全国の暑さ指数(WBGT)
暑さ指数の実況と予測地図表示・グラフや日表
暑さ指数メール配信サービス個人向けのメール通知
暑さ指数電子情報提供サービス事業者向けのCSVファイル提供
暑さ指数と熱中症救急搬送人員速報毎週木曜更新
熱中症リスクカレンダー過去5年間の日別暑さ指数一覧表
暑さ指数の実況値・予測値ダウンロード
過去の傾向から見る熱中症リスクカレンダー
熱中症リスクカレンダーについて
熱中症リスクカレンダーは、暑さ指数(WBGT)を提供している全国約840地点を対象に、過去5年間の値について、昼間の日最高値と夜間の日最低値をカレンダー形式にまとめたもので、熱中症が発生する危険度（リスク）の目安を示しています。
特に、夏期に屋外でイベントなどを計画するときや、夜も暑さが収まらず室内の熱中症に注意が必要となる時期を調べるときなどに、ご活用ください。
※地点を選択して、表示に追加することができます
【留意事項】
※本サイトに掲載している熱中症リスクカレンダーは、あくまで過去5年間の暑さ指数(WBGT)の観測データを統計処理して表示したものであり、気象庁による長期間の予報などに基づくものではありません。
直近の暑さ指数については本サイトの「全国の暑さ指数(WBGT)」を、中・長期間の天候予測については気象庁発表の「季節予報」や「早期天候情報」などを参照し、常に最新のデータを確認するようにしてください。
全国11都市における過去5年間の昼間の日最高暑さ指数（WBGT）
| 年 | 月 | 日 | 札幌 | 仙台 | 東京 | 名古屋 | 新潟 | 大阪 | 広島 | 高知 | 福岡 | 鹿児島 | 那覇 |
| 2021 | 5 | 1 | 8.6 | 15.7 | 20.3 | 19.5 | 16.9 | 21.2 | 19.0 | - | 18.9 | 23.3 | 26.6 |
| 2021 | 5 | 2 | 7.3 | 15.5 | 20.2 | 14.6 | 13.3 | 14.7 | 14.2 | - | 14.0 | 15.0 | 23.4 |
| 2021 | 5 | 3 | 8.8 | 13.6 | 18.1 | 16.6 | 14.8 | 15.8 | 17.2 | - | 19.2 | 18.6 | 22.9 |
| 2021 | 5 | 4 | 10.6 | 16.8 | 19.2 | 19.7 | 16.5 | 18.6 | 18.4 | - | 18.7 | 22.0 | 24.2 |
| 2021 | 5 | 5 | 13.4 | 16.7 | 19.4 | 17.4 | 15.2 | 17.3 | 21.2 | - | 20.7 | 21.6 | 26.1 |
| 2021 | 5 | 6 | 15.4 | 19.6 | 22.3 | 20.4 | 18.7 | 20.2 | 17.4 | - | 20.2 | 23.3 | 28.8 |
| 2021 | 5 | 7 | 15.5 | 17.6 | 18.9 | 16.1 | 19.1 | 17.0 | 16.9 | - | 21.6 | 21.5 | 28.1 |
| 2021 | 5 | 8 | 15.9 | 20.0 | 24.4 | 20.5 | 18.7 | 19.9 | 19.0 | - | 19.8 | 22.6 | 27.9 |
| 2021 | 5 | 9 | 15.4 | 19.8 | 24.2 | 23.0 | 16.4 | 21.4 | 19.6 | - | 20.8 | 24.7 | 28.2 |
| 2021 | 5 | 10 | 12.5 | 15.4 | 21.7 | 18.7 | 15.0 | 17.1 | 17.1 | - | 21.7 | 25.0 | 25.5 |
| 2021 | 5 | 11 | 11.3 | 17.5 | 16.4 | 19.3 | 16.3 | 20.5 | 19.5 | - | 21.4 | 24.5 | 28.3 |
| 2021 | 5 | 12 | 14.7 | 16.2 | 18.0 | 19.5 | 16.4 | 18.4 | 16.3 | - | 18.9 | 22.1 | 28.9 |
| 2021 | 5 | 13 | 13.8 | 19.5 | 16.6 | 23.6 | 21.0 | 24.1 | 22.9 | - | 25.6 | 23.5 | 29.1 |
| 2021 | 5 | 14 | 17.0 | 21.5 | 24.6 | 25.8 | 20.2 | 25.7 | 23.7 | - | 26.7 | 23.4 | 30.1 |
| 2021 | 5 | 15 | 15.7 | 18.3 | 24.3 | 23.2 | 24.8 | 24.3 | 22.7 | - | 23.1 | 23.1 | 28.7 |
| 2021 | 5 | 16 | 13.5 | 21.8 | 20.7 | 18.2 | 21.9 | 22.5 | 21.1 | - | 28.0 | 28.9 | 29.1 |
| 2021 | 5 | 17 | 18.8 | 23.4 | 24.2 | 23.8 | 20.3 | 25.0 | 23.3 | - | 23.7 | 25.1 | 29.4 |
| 2021 | 5 | 18 | 19.2 | 19.6 | 22.2 | 26.5 | 18.1 | 24.6 | 21.9 | - | 20.5 | 22.3 | 29.0 |
| 2021 | 5 | 19 | 18.9 | 16.5 | 18.3 | 23.0 | 18.5 | 21.0 | 22.4 | - | 24.0 | 25.8 | 29.3 |
| 2021 | 5 | 20 | 22.5 | 21.8 | 22.2 | 22.2 | 21.5 | 22.7 | 20.6 | - | 23.4 | 26.7 | 30.2 |
| 2021 | 5 | 21 | 16.6 | 16.5 | 25.1 | 23.8 | 20.6 | 22.5 | 20.8 | - | 20.2 | 23.0 | 29.7 |
| 2021 | 5 | 22 | 17.6 | 17.4 | 24.5 | 21.3 | 20.1 | 21.4 | 20.8 | - | 21.8 | 20.8 | 28.6 |
| 2021 | 5 | 23 | 18.5 | 18.0 | 23.3 | 22.1 | 17.6 | 22.3 | 22.4 | - | 25.0 | 24.6 | 30.7 |
| 2021 | 5 | 24 | 15.2 | 20.8 | 24.8 | 22.4 | 23.4 | 21.7 | 19.1 | - | 20.4 | 22.5 | 30.4 |
| 2021 | 5 | 25 | 18.0 | 21.5 | 25.5 | 23.8 | 19.0 | 21.5 | 21.0 | - | 22.8 | 25.2 | 26.1 |
| 2021 | 5 | 26 | 15.8 | 17.0 | 21.8 | 18.8 | 17.2 | 17.7 | 19.6 | - | 20.4 | 21.5 | 29.6 |
| 2021 | 5 | 27 | 14.3 | 15.9 | 17.9 | 16.6 | 17.4 | 17.9 | 20.4 | - | 22.5 | 24.3 | 31.0 |
| 2021 | 5 | 28 | 14.6 | 21.8 | 24.3 | 23.2 | 21.8 | 21.3 | 21.1 | - | 22.2 | 22.8 | 29.3 |
| 2021 | 5 | 29 | 16.6 | 22.0 | 24.0 | 23.8 | 20.4 | 22.8 | 21.9 | - | 23.0 | 23.3 | 24.5 |
| 2021 | 5 | 30 | 15.9 | 19.3 | 23.2 | 21.5 | 18.8 | 21.3 | 20.9 | - | 24.6 | 24.5 | 23.3 |
| 2021 | 5 | 31 | 13.0 | 20.3 | 23.4 | 23.8 | 18.9 | 21.2 | 21.0 | - | 25.2 | 25.5 | 27.0 |
| 2021 | 6 | 1 | 15.7 | 19.6 | 22.9 | 25.2 | 19.3 | 22.6 | 22.9 | - | 26.6 | 26.3 | 27.6 |
| 2021 | 6 | 2 | 19.1 | 23.2 | 24.5 | 24.2 | 22.5 | 23.8 | 23.1 | - | 25.4 | 23.5 | 29.1 |
| 2021 | 6 | 3 | 20.7 | 22.8 | 24.1 | 23.6 | 25.4 | 23.6 | 20.1 | - | 22.9 | 23.3 | 30.5 |
| 2021 | 6 | 4 | 17.4 | 18.9 | 23.4 | 22.9 | 20.4 | 21.8 | 21.8 | - | 22.7 | 24.8 | 31.3 |
| 2021 | 6 | 5 | 20.8 | 22.7 | 24.9 | 21.8 | 20.9 | 21.0 | 19.8 | - | 20.6 | 21.7 | 30.4 |
| 2021 | 6 | 6 | 21.3 | 25.3 | 24.1 | 24.0 | 22.6 | 23.3 | 23.0 | - | 24.2 | 24.3 | 29.8 |
| 2021 | 6 | 7 | 20.6 | 22.6 | 25.5 | 27.1 | 23.6 | 25.9 | 24.0 | - | 27.2 | 27.8 | 28.3 |
| 2021 | 6 | 8 | 20.6 | 22.8 | 27.5 | 26.4 | 22.6 | 26.0 | 25.7 | - | 27.5 | 26.9 | 31.1 |
| 2021 | 6 | 9 | 19.5 | 24.3 | 24.8 | 25.5 | 22.3 | 24.6 | 24.9 | - | 28.3 | 28.5 | 29.9 |
| 2021 | 6 | 10 | 23.7 | 24.3 | 26.7 | 26.1 | 24.2 | 25.5 | 24.6 | - | 28.4 | 27.2 | 29.6 |
| 2021 | 6 | 11 | 25.2 | 24.5 | 25.2 | 25.2 | 24.5 | 24.1 | 22.9 | - | 22.3 | 26.5 | 29.6 |
| 2021 | 6 | 12 | 21.8 | 24.1 | 25.8 | 25.3 | 25.0 | 23.9 | 23.1 | - | 26.0 | 27.1 | 31.0 |
| 2021 | 6 | 13 | 25.2 | 25.4 | 24.6 | 24.1 | 22.9 | 25.0 | 26.1 | - | 26.9 | 26.8 | 29.8 |
| 2021 | 6 | 14 | 21.1 | 24.7 | 24.3 | 26.7 | 22.3 | 26.8 | 25.5 | - | 27.2 | 27.9 | 25.9 |
| 2021 | 6 | 15 | 21.0 | 23.8 | 26.6 | 27.9 | 22.7 | 27.4 | 25.1 | - | 25.5 | 25.7 | 31.0 |
| 2021 | 6 | 16 | 23.5 | 23.6 | 24.0 | 24.3 | 23.8 | 22.1 | 22.3 | - | 23.2 | 24.3 | 31.1 |
| 2021 | 6 | 17 | 22.7 | 22.0 | 24.1 | 26.1 | 24.4 | 26.0 | 25.0 | - | 27.1 | 26.2 | 29.8 |
| 2021 | 6 | 18 | 20.8 | 22.2 | 25.0 | 23.9 | 24.7 | 22.7 | 21.0 | - | 22.8 | 27.0 | 31.4 |
| 2021 | 6 | 19 | 17.4 | 20.2 | 21.5 | 20.5 | 20.7 | 21.9 | 26.1 | - | 26.6 | 28.1 | 31.0 |
| 2021 | 6 | 20 | 21.3 | 25.2 | 27.2 | 24.0 | 23.0 | 24.7 | 23.9 | - | 26.9 | 27.4 | 31.5 |
| 2021 | 6 | 21 | 20.6 | 22.2 | 25.9 | 26.4 | 22.5 | 25.2 | 24.8 | - | 27.1 | 27.7 | 28.8 |
| 2021 | 6 | 22 | 21.4 | 21.8 | 25.8 | 25.1 | 25.0 | 24.0 | 24.7 | - | 26.0 | 27.2 | 27.0 |
| 2021 | 6 | 23 | 21.0 | 20.0 | 24.6 | 26.7 | 23.9 | 25.5 | 24.8 | - | 26.5 | 27.9 | 25.1 |
| 2021 | 6 | 24 | 19.4 | 22.1 | 26.5 | 25.8 | 24.3 | 25.7 | 25.1 | - | 26.1 | 27.8 | 24.7 |
| 2021 | 6 | 25 | 22.3 | 24.7 | 26.1 | 25.9 | 24.4 | 26.6 | 26.2 | - | 26.3 | 26.8 | 29.2 |
| 2021 | 6 | 26 | 24.8 | 25.7 | 25.1 | 25.4 | 25.9 | 23.4 | 23.1 | - | 25.8 | 25.6 | 30.7 |
| 2021 | 6 | 27 | 24.0 | 24.9 | 25.4 | 24.4 | 24.9 | 23.9 | 25.7 | - | 28.6 | 24.4 | 30.1 |
| 2021 | 6 | 28 | 22.9 | 25.1 | 26.7 | 27.6 | 26.5 | 26.6 | 25.6 | - | 28.0 | 23.9 | 28.7 |
| 2021 | 6 | 29 | 22.9 | 20.1 | 25.5 | 28.5 | 25.2 | 27.3 | 26.4 | - | 27.8 | 29.1 | 26.7 |
| 2021 | 6 | 30 | 23.3 | 24.0 | 21.9 | 26.8 | 26.9 | 28.2 | 26.4 | - | 29.5 | 30.0 | 27.5 |
| 2021 | 7 | 1 | 22.3 | 21.8 | 22.9 | 23.8 | 25.9 | 23.6 | 26.7 | - | 29.2 | 29.1 | 29.8 |
| 2021 | 7 | 2 | 21.9 | 23.3 | 22.3 | 26.3 | 27.3 | 26.5 | 28.3 | - | 29.0 | 30.4 | 30.0 |
| 2021 | 7 | 3 | 24.2 | 22.5 | 25.3 | 30.4 | 28.6 | 27.8 | 27.7 | - | 26.3 | 28.2 | 31.3 |
| 2021 | 7 | 4 | 22.3 | 19.2 | 20.9 | 29.2 | 24.1 | 28.4 | 27.4 | - | 29.5 | 30.5 | 31.4 |
| 2021 | 7 | 5 | 20.6 | 25.9 | 25.3 | 28.6 | 24.3 | 27.9 | 27.5 | - | 30.3 | 30.6 | 30.8 |
| 2021 | 7 | 6 | 22.2 | 26.4 | 30.0 | 27.3 | 25.5 | 30.0 | 26.0 | - | 28.8 | 31.3 | 31.1 |
| 2021 | 7 | 7 | 21.0 | 22.0 | 29.1 | 26.0 | 23.9 | 26.3 | 29.0 | - | 30.0 | 31.7 | 31.6 |
| 2021 | 7 | 8 | 23.9 | 22.3 | 24.7 | 25.4 | 26.5 | 27.4 | 27.5 | - | 28.9 | 31.0 | 30.3 |
| 2021 | 7 | 9 | 22.1 | 21.8 | 24.9 | 31.5 | 26.5 | 28.6 | 24.0 | - | 28.1 | 31.3 | 30.8 |
| 2021 | 7 | 10 | 22.0 | 23.7 | 31.4 | 30.5 | 27.4 | 27.8 | 25.9 | - | 27.4 | 27.6 | 31.0 |
| 2021 | 7 | 11 | 23.4 | 25.1 | 31.5 | 30.6 | 27.4 | 28.4 | 27.7 | - | 30.4 | 29.4 | 31.7 |
| 2021 | 7 | 12 | 25.6 | 27.7 | 30.5 | 29.2 | 26.9 | 28.6 | 27.6 | - | 31.4 | 31.0 | 31.5 |
| 2021 | 7 | 13 | 26.6 | 27.3 | 28.9 | 30.4 | 28.2 | 29.0 | 29.1 | - | 31.5 | 30.2 | 31.1 |
| 2021 | 7 | 14 | 25.4 | 24.8 | 28.0 | 30.3 | 28.8 | 29.7 | 29.7 | - | 31.8 | 31.1 | 31.5 |
| 2021 | 7 | 15 | 26.7 | 24.8 | 30.2 | 27.8 | 28.6 | 28.5 | 28.2 | - | 31.7 | 30.4 | 31.0 |
| 2021 | 7 | 16 | 28.3 | 29.5 | 30.5 | 30.2 | 29.2 | 27.8 | 25.0 | - | 27.9 | 26.9 | 30.0 |
| 2021 | 7 | 17 | 28.2 | 30.2 | 30.1 | 29.2 | 29.8 | 29.9 | 27.4 | - | 27.1 | 24.2 | 31.6 |
| 2021 | 7 | 18 | 29.0 | 30.7 | 31.5 | 30.3 | 30.0 | 31.4 | 25.8 | - | 30.1 | 29.3 | 31.6 |
| 2021 | 7 | 19 | 29.2 | 31.0 | 32.9 | 32.4 | 29.9 | 30.2 | 29.8 | - | 32.0 | 30.2 | 30.4 |
| 2021 | 7 | 20 | 27.7 | 32.1 | 31.8 | 31.8 | 30.2 | 30.7 | 28.9 | - | 30.2 | 30.0 | 26.2 |
| 2021 | 7 | 21 | 28.9 | 30.0 | 30.5 | 31.7 | 29.6 | 29.5 | 28.4 | - | 29.0 | 29.2 | 27.1 |
| 2021 | 7 | 22 | 28.4 | 25.7 | 31.0 | 31.4 | 29.6 | 30.2 | 28.3 | - | 28.7 | 29.6 | 27.7 |
| 2021 | 7 | 23 | 27.5 | 28.0 | 30.8 | 31.0 | 29.7 | 29.9 | 28.5 | - | 29.8 | 29.0 | 26.9 |
| 2021 | 7 | 24 | 28.8 | 29.1 | 30.0 | 31.1 | 29.9 | 30.1 | 29.9 | - | 30.1 | 29.5 | 27.3 |
| 2021 | 7 | 25 | 28.0 | 28.3 | 31.3 | 30.6 | 29.6 | 29.9 | 28.4 | - | 30.0 | 27.3 | 30.5 |
| 2021 | 7 | 26 | 25.4 | 26.2 | 29.0 | 30.7 | 28.9 | 29.2 | 28.4 | - | 30.8 | 29.5 | 30.2 |
| 2021 | 7 | 27 | 28.9 | 27.4 | 26.8 | 27.4 | 28.3 | 29.8 | 28.8 | - | 31.8 | 30.5 | 30.3 |
| 2021 | 7 | 28 | 29.7 | 27.1 | 31.2 | 30.6 | 29.3 | 29.1 | 28.2 | - | 31.0 | 30.6 | 31.2 |
| 2021 | 7 | 29 | 28.0 | 28.8 | 30.8 | 30.6 | 30.8 | 29.5 | 29.3 | - | 30.3 | 30.5 | 30.4 |
| 2021 | 7 | 30 | 28.5 | 28.2 | 29.2 | 30.6 | 30.1 | 30.2 | 27.9 | - | 30.4 | 31.3 | 30.9 |
| 2021 | 7 | 31 | 29.6 | 29.3 | 30.8 | 31.5 | 30.0 | 30.7 | 28.7 | - | 32.6 | 32.5 | 32.2 |
| 2021 | 8 | 1 | 28.4 | 30.1 | 32.0 | 30.8 | 29.9 | 30.3 | 29.3 | - | 31.5 | 31.1 | 30.9 |
| 2021 | 8 | 2 | 27.7 | 30.1 | 31.5 | 30.7 | 30.3 | 29.7 | 29.7 | - | 32.9 | 31.2 | 30.5 |
| 2021 | 8 | 3 | 31.1 | 30.4 | 31.5 | 29.9 | 32.0 | 28.9 | 28.6 | - | 32.6 | 31.2 | 30.6 |
| 2021 | 8 | 4 | 30.0 | 31.8 | 32.6 | 31.6 | 32.1 | 32.3 | 29.8 | - | 32.5 | 31.2 | 29.7 |
| 2021 | 8 | 5 | 30.7 | 31.5 | 32.6 | 32.0 | 31.2 | 32.5 | 31.6 | - | 32.5 | 30.6 | 28.1 |
| 2021 | 8 | 6 | 31.2 | 30.4 | 31.8 | 31.0 | 32.1 | 30.7 | 29.9 | - | 31.6 | 31.0 | 31.1 |
| 2021 | 8 | 7 | 29.8 | 28.7 | 29.9 | 31.4 | 31.6 | 31.1 | 29.9 | - | 32.2 | 31.9 | 29.7 |
| 2021 | 8 | 8 | 27.6 | 29.4 | 27.3 | 32.6 | 31.3 | 31.2 | 29.7 | - | 30.2 | 28.4 | 31.0 |
| 2021 | 8 | 9 | 23.8 | 27.1 | 30.7 | 29.7 | 30.2 | 27.4 | 27.1 | - | 28.5 | 30.7 | 30.7 |
| 2021 | 8 | 10 | 17.3 | 28.5 | 33.4 | 28.9 | 26.5 | 27.7 | 28.0 | - | 31.2 | 29.7 | 31.7 |
| 2021 | 8 | 11 | 19.6 | 23.4 | 29.9 | 28.2 | 26.3 | 28.4 | 25.7 | - | 23.6 | 25.9 | 30.1 |
| 2021 | 8 | 12 | 20.2 | 20.8 | 28.6 | 26.5 | 26.6 | 24.9 | 22.8 | - | 25.1 | 28.1 | 29.6 |
| 2021 | 8 | 13 | 21.4 | 19.1 | 25.0 | 25.5 | 23.9 | 25.8 | 25.2 | - | 25.0 | 26.4 | 30.2 |
| 2021 | 8 | 14 | 19.5 | 18.5 | 25.3 | 26.3 | 23.3 | 27.0 | 24.2 | - | 24.3 | 28.2 | 30.9 |
| 2021 | 8 | 15 | 20.5 | 19.7 | 20.1 | 28.0 | 26.2 | 27.1 | 25.3 | - | 28.0 | 27.0 | 31.0 |
| 2021 | 8 | 16 | 20.1 | 20.4 | 22.0 | 24.8 | 25.2 | 25.6 | 24.4 | - | 24.6 | 26.8 | 30.5 |
| 2021 | 8 | 17 | 21.9 | 22.1 | 26.7 | 26.4 | 23.7 | 24.3 | 24.1 | - | 24.5 | 25.6 | 30.7 |
| 2021 | 8 | 18 | 18.1 | 28.8 | 30.1 | 29.1 | 29.0 | 28.9 | 24.5 | - | 25.9 | 25.6 | 28.7 |
| 2021 | 8 | 19 | 22.4 | 28.9 | 31.2 | 26.5 | 30.0 | 23.7 | 27.1 | - | 29.5 | 29.6 | 29.6 |
| 2021 | 8 | 20 | 24.5 | 28.4 | 31.6 | 28.9 | 29.8 | 29.5 | 25.4 | - | 29.3 | 23.8 | 32.4 |
| 2021 | 8 | 21 | 24.9 | 26.1 | 31.0 | 28.2 | 29.9 | 28.3 | 26.9 | - | 28.3 | 29.8 | 30.3 |
| 2021 | 8 | 22 | 23.1 | 26.9 | 30.9 | 31.4 | 30.0 | 29.7 | 26.1 | - | 27.6 | 31.2 | 30.3 |
| 2021 | 8 | 23 | 24.9 | 27.8 | 28.9 | 30.1 | 27.9 | 29.5 | 28.4 | - | 30.5 | 30.9 | 30.5 |
| 2021 | 8 | 24 | 24.6 | 25.1 | 29.5 | 28.9 | 26.9 | 28.4 | 25.9 | - | 28.4 | 30.8 | 30.9 |
| 2021 | 8 | 25 | 21.0 | 30.4 | 32.7 | 31.4 | 26.3 | 30.4 | 28.6 | - | 30.3 | 31.0 | 31.8 |
| 2021 | 8 | 26 | 26.7 | 29.5 | 33.6 | 31.7 | 30.0 | 29.7 | 28.2 | - | 30.2 | 29.8 | 30.4 |
| 2021 | 8 | 27 | 24.5 | 30.4 | 32.5 | 30.0 | 28.3 | 30.1 | 29.2 | - | 32.0 | 31.1 | 30.0 |
| 2021 | 8 | 28 | 27.0 | 29.6 | 33.3 | 30.0 | 28.6 | 29.5 | 28.4 | - | 30.4 | 31.1 | 30.7 |
| 2021 | 8 | 29 | 23.4 | 26.6 | 29.3 | 30.2 | 27.2 | 30.3 | 29.2 | - | 31.2 | 30.5 | 31.9 |
| 2021 | 8 | 30 | 24.8 | 27.9 | 32.0 | 30.9 | 25.4 | 30.1 | 29.1 | - | 31.5 | 30.7 | 30.9 |
| 2021 | 8 | 31 | 21.4 | 24.3 | 29.6 | 28.4 | 25.6 | 29.6 | 28.4 | - | 31.5 | 30.4 | 29.8 |
| 2021 | 9 | 1 | 22.4 | 19.6 | 22.8 | 27.5 | 20.2 | 29.3 | 28.4 | - | 29.5 | 28.8 | 29.5 |
| 2021 | 9 | 2 | 21.8 | 21.4 | 20.1 | 26.3 | 24.8 | 24.9 | 25.8 | - | 30.4 | 30.7 | 30.8 |
| 2021 | 9 | 3 | 23.2 | 24.3 | 21.1 | 23.6 | 24.1 | 23.1 | 22.7 | - | 27.5 | 28.8 | 30.8 |
| 2021 | 9 | 4 | 23.0 | 20.7 | 22.5 | 25.4 | 23.1 | 25.8 | 25.6 | - | 29.8 | 31.4 | 30.6 |
| 2021 | 9 | 5 | 22.9 | 22.0 | 24.7 | 28.7 | 26.1 | 27.1 | 24.8 | - | 27.4 | 30.0 | 31.6 |
| 2021 | 9 | 6 | 22.3 | 17.6 | 19.9 | 27.8 | 22.6 | 27.1 | 26.4 | - | 29.2 | 29.2 | 30.2 |
| 2021 | 9 | 7 | 22.0 | 20.1 | 22.5 | 25.3 | 22.4 | 26.1 | 23.2 | - | 29.0 | 29.9 | 30.8 |
| 2021 | 9 | 8 | 17.7 | 18.9 | 22.2 | 21.2 | 18.5 | 25.5 | 26.6 | - | 27.8 | 30.4 | 30.4 |
| 2021 | 9 | 9 | 22.1 | 25.5 | 22.7 | 28.3 | 26.7 | 27.7 | 26.8 | - | 28.2 | 28.6 | 31.6 |
| 2021 | 9 | 10 | 23.1 | 26.7 | 29.5 | 27.4 | 26.2 | 27.4 | 26.1 | - | 27.7 | 28.2 | 31.7 |
| 2021 | 9 | 11 | 24.0 | 24.9 | 26.9 | 26.3 | 25.2 | 27.0 | 25.4 | - | 26.3 | 29.9 | 30.5 |
| 2021 | 9 | 12 | 22.3 | 26.3 | 26.2 | 25.6 | 26.2 | 24.4 | 25.4 | - | 27.9 | 25.8 | 30.5 |
| 2021 | 9 | 13 | 18.4 | 22.4 | 25.9 | 25.8 | 23.3 | 25.1 | 24.8 | - | 25.0 | 27.0 | 30.3 |
| 2021 | 9 | 14 | 17.6 | 20.8 | 25.1 | 23.7 | 22.9 | 21.2 | 21.5 | - | 22.9 | 24.0 | 30.9 |
| 2021 | 9 | 15 | 18.1 | 23.6 | 27.5 | 27.3 | 23.4 | 25.2 | 23.7 | - | 25.8 | 31.3 | 30.2 |
| 2021 | 9 | 16 | 19.0 | 20.2 | 23.5 | 26.9 | 23.8 | 24.9 | 23.5 | - | 31.0 | 30.8 | 29.9 |
| 2021 | 9 | 17 | 20.2 | 21.2 | 24.1 | 22.9 | 23.5 | 23.9 | 25.7 | - | 25.9 | 28.0 | 31.0 |
| 2021 | 9 | 18 | 20.7 | 22.8 | 26.2 | 26.4 | 23.4 | 28.1 | 26.1 | - | 27.3 | 28.9 | 29.6 |
| 2021 | 9 | 19 | 21.2 | 23.3 | 25.7 | 26.5 | 23.9 | 26.4 | 24.5 | - | 27.0 | 27.8 | 28.9 |
| 2021 | 9 | 20 | 18.2 | 23.2 | 25.7 | 27.0 | 23.4 | 27.4 | 25.2 | - | 29.0 | 28.2 | 28.3 |
| 2021 | 9 | 21 | 21.1 | 23.0 | 23.9 | 24.7 | 24.9 | 27.2 | 25.4 | - | 28.1 | 29.4 | 30.3 |
| 2021 | 9 | 22 | 22.7 | 26.2 | 27.9 | 27.2 | 25.9 | 29.4 | 27.1 | - | 28.1 | 29.5 | 30.7 |
| 2021 | 9 | 23 | 24.2 | 26.0 | 29.2 | 27.1 | 24.7 | 26.6 | 26.2 | - | 28.5 | 29.2 | 30.2 |
| 2021 | 9 | 24 | 16.5 | 25.1 | 25.8 | 25.9 | 22.9 | 25.3 | 24.2 | - | 24.9 | 27.5 | 28.5 |
| 2021 | 9 | 25 | 17.0 | 20.6 | 21.1 | 26.8 | 22.7 | 27.4 | 23.8 | - | 27.3 | 27.9 | 32.0 |
| 2021 | 9 | 26 | 18.2 | 18.2 | 19.5 | 20.1 | 21.2 | 21.3 | 25.1 | - | 27.4 | 28.4 | 31.2 |
| 2021 | 9 | 27 | 19.8 | 21.0 | 21.3 | 24.3 | 23.2 | 25.5 | 24.8 | - | 28.0 | 27.8 | 30.0 |
| 2021 | 9 | 28 | 18.6 | 21.9 | 23.2 | 26.0 | 24.7 | 24.7 | 24.3 | - | 27.5 | 28.4 | 28.4 |
| 2021 | 9 | 29 | 20.5 | 22.6 | 23.8 | 25.7 | 24.3 | 26.5 | 25.8 | - | 29.9 | 29.1 | 30.0 |
| 2021 | 9 | 30 | 20.2 | 25.5 | 27.2 | 25.8 | 26.5 | 25.2 | 26.5 | - | 28.0 | 28.0 | 29.0 |
| 2021 | 10 | 1 | 21.5 | 20.7 | 19.9 | 23.5 | 21.1 | 23.3 | 24.7 | - | 27.3 | 27.8 | 27.6 |
| 2021 | 10 | 2 | 20.6 | 22.4 | 24.5 | 24.1 | 24.1 | 25.4 | 23.1 | - | 27.5 | 26.9 | 27.2 |
| 2021 | 10 | 3 | 17.3 | 22.3 | 24.6 | 24.6 | 24.4 | 24.3 | 24.2 | - | 27.9 | 27.1 | 29.9 |
| 2021 | 10 | 4 | 22.9 | 24.6 | 26.5 | 26.5 | 25.4 | 26.4 | 23.8 | - | 26.5 | 27.5 | 28.7 |
| 2021 | 10 | 5 | 14.7 | 22.8 | 26.4 | 26.0 | 25.3 | 25.2 | 24.2 | - | 27.6 | 27.9 | 30.4 |
| 2021 | 10 | 6 | 15.8 | 19.3 | 26.5 | 26.8 | 19.9 | 25.0 | 25.7 | - | 27.4 | 26.6 | 29.7 |
| 2021 | 10 | 7 | 13.7 | 19.4 | 22.0 | 25.0 | 23.3 | 26.8 | 24.9 | - | 26.4 | 27.1 | 28.2 |
| 2021 | 10 | 8 | 17.8 | 21.9 | 27.4 | 26.7 | 24.3 | 26.1 | 25.8 | - | 28.6 | 28.2 | 29.6 |
| 2021 | 10 | 9 | 17.6 | 18.6 | 26.5 | 27.1 | 23.2 | 26.7 | 26.1 | - | 28.7 | 28.1 | 29.7 |
| 2021 | 10 | 10 | 19.9 | 23.9 | 25.3 | 27.4 | 25.8 | 26.4 | 24.9 | - | 29.5 | 28.0 | 28.9 |
| 2021 | 10 | 11 | 18.7 | 25.9 | 27.0 | 26.6 | 22.6 | 25.8 | 25.9 | - | 28.6 | 30.1 | 28.3 |
| 2021 | 10 | 12 | 16.5 | 16.2 | 22.1 | 26.7 | 18.5 | 27.1 | 24.0 | - | 27.5 | 28.8 | 26.9 |
| 2021 | 10 | 13 | 15.7 | 16.0 | 18.0 | 24.9 | 20.7 | 24.8 | 25.6 | - | 26.2 | 28.2 | 29.5 |
| 2021 | 10 | 14 | 18.3 | 20.4 | 22.8 | 23.2 | 21.8 | 24.9 | 23.2 | - | 25.6 | 29.3 | 29.0 |
| 2021 | 10 | 15 | 15.5 | 21.6 | 23.1 | 23.6 | 21.4 | 24.1 | 23.1 | - | 25.7 | 27.6 | 29.1 |
| 2021 | 10 | 16 | 13.5 | 14.7 | 21.3 | 25.6 | 19.0 | 25.2 | 22.5 | - | 22.3 | 27.7 | 28.4 |
| 2021 | 10 | 17 | 7.9 | 14.3 | 20.2 | 17.6 | 16.4 | 19.0 | 17.9 | - | 19.2 | 19.3 | 24.2 |
| 2021 | 10 | 18 | 8.4 | 12.6 | 15.0 | 13.4 | 15.9 | 17.1 | 17.0 | - | 18.7 | 19.2 | 24.3 |
| 2021 | 10 | 19 | 14.0 | 14.3 | 12.7 | 18.5 | 17.1 | 17.5 | 17.4 | - | 19.7 | 21.4 | 25.5 |
| 2021 | 10 | 20 | 8.9 | 15.2 | 16.8 | 15.1 | 14.3 | 15.1 | 14.5 | - | 16.1 | 18.5 | 24.4 |
| 2021 | 10 | 21 | 8.4 | 12.8 | 16.2 | 13.9 | 13.2 | 14.2 | 13.9 | - | 15.4 | 14.8 | 26.0 |
| 2021 | 10 | 22 | 9.5 | 16.0 | 11.3 | 17.4 | 15.2 | 16.9 | 16.3 | - | 19.5 | 19.8 | 21.0 |
| 2021 | 10 | 23 | 10.2 | 12.1 | 15.4 | 14.6 | 11.7 | 14.8 | 14.4 | - | 18.0 | 18.9 | 20.8 |
| 2021 | 10 | 24 | 15.0 | 16.9 | 16.6 | 16.0 | 16.3 | 16.7 | 14.9 | - | 17.2 | 20.3 | 24.8 |
| 2021 | 10 | 25 | 15.2 | 15.6 | 15.4 | 14.6 | 13.9 | 14.3 | 12.4 | - | 19.2 | 18.5 | 25.4 |
| 2021 | 10 | 26 | 15.6 | 13.4 | 19.0 | 19.8 | 17.4 | 19.9 | 19.3 | - | 21.2 | 20.7 | 23.2 |
| 2021 | 10 | 27 | 15.4 | 18.0 | 15.8 | 18.3 | 17.0 | 19.5 | 18.3 | - | 20.2 | 19.8 | 23.0 |
| 2021 | 10 | 28 | 13.2 | 16.6 | 20.0 | 18.5 | 17.4 | 18.8 | 18.6 | - | 21.6 | 18.6 | 22.4 |
| 2021 | 10 | 29 | 9.9 | 15.1 | 15.6 | 16.0 | 14.7 | 17.7 | 16.0 | - | 17.2 | 19.3 | 23.8 |
| 2021 | 10 | 30 | 12.6 | 15.4 | 16.3 | 18.6 | 18.0 | 17.9 | 17.7 | - | 19.6 | 20.0 | 25.0 |
| 2021 | 10 | 31 | 12.7 | 16.3 | 13.6 | 19.7 | 18.1 | 19.0 | 20.4 | - | 21.7 | 22.5 | 23.8 |
昼間の日最高暑さ指数(WBGT)とは？*1
上の図は、各観測地点における、5月から10月までの毎日の暑さ指数（WBGT）の最高値（毎時の24個の値の最高）を表にまとめたもので、昼間の熱中症のおおよその危険度を確認することができます。
期間は2021年から2025年までの過去5年間で、一番左の列に5年間の最高値（各地点における5個の値のうちの最高）を掲載しています。（※それぞれの列をクリックすると拡大して閲覧できます）
*1 日最高暑さ指数が主に日中に記録されることが多いため、「昼間の～」と表記しています。まれに夜間に記録されることもあります。
昼間の日最高暑さ指数(WBGT)の活用例
夏期に屋外でイベントなどを計画する際の目安としてご活用下さい。チェックポイントの例を以下に示します。
(1) 赤色 の期間（暑さ指数が31以上）をチェックする
赤色 は、熱中症の発生が危険なレベルとなっていた期間です。
暑さ指数（WBGT）がこのような高温になった場合は、屋外での活動をなるべく避けることが必要です。また、イベントの中止なども想定した準備体制が必要になります。可能であれば、事前にこの時期の開催を避けるようにしましょう。
(2) オレンジ色 の期間（暑さ指数が28以上）をチェックする
オレンジ色 は、熱中症の発生に厳重な警戒が必要なレベルとなっていた期間です。
強い日射を防ぐ対策や水分補給、適切な休憩などを考慮するとともに、熱中症が発生した場合の応急処置や連絡体制の確立など、十分な準備を行う必要があります。
(3) 黄色 の期間（暑さ指数が25以上）をチェックする
黄色 は、熱中症の発生に警戒が必要なレベルとなっていた期間です。
激しい運動や作業を行う場合は定期的に休息をとり、水分を十分に補給することが必要となりますので、それらに配慮したイベントの運営計画が必要になります。
(4) 急に暑くなっている期間がないかチェックする
暑くなりはじめる時期や、急に暑くなった場合は、身体が暑さに慣れていないため、熱中症の発生件数が増加する傾向にあります。
このカレンダーで、青色や水色から黄色やオレンジ色に変わっているかどうかチェックしてください。
全国11都市における過去5年間の夜間の日最低暑さ指数（WBGT）
| 年 | 月 | 日 | 札幌 | 仙台 | 東京 | 名古屋 | 新潟 | 大阪 | 広島 | 高知 | 福岡 | 鹿児島 | 那覇 |
| 2021 | 5 | 1 | 4.7 | 8.4 | 11.3 | 10.2 | 10.5 | 11.9 | 9.1 | - | 10.6 | 11.0 | 19.5 |
| 2021 | 5 | 2 | 3.6 | 6.4 | 8.1 | 8.0 | 6.8 | 8.9 | 8.3 | - | 9.6 | 9.6 | 16.3 |
| 2021 | 5 | 3 | 2.7 | 6.1 | 7.3 | 7.1 | 7.5 | 8.9 | 6.4 | - | 8.6 | 8.8 | 15.6 |
| 2021 | 5 | 4 | 5.2 | 6.3 | 7.9 | 8.3 | 10.5 | 9.6 | 9.3 | - | 11.4 | 11.9 | 18.5 |
| 2021 | 5 | 5 | 6.4 | 9.5 | 11.8 | 14.1 | 10.0 | 14.6 | 11.4 | - | 12.5 | 13.1 | 22.0 |
| 2021 | 5 | 6 | 7.1 | 10.3 | 13.4 | 12.6 | 11.1 | 12.7 | 8.5 | - | 10.0 | 9.4 | 21.5 |
| 2021 | 5 | 7 | 7.6 | 9.5 | 13.2 | 12.6 | 10.9 | 12.9 | 11.8 | - | 16.2 | 16.9 | 23.5 |
| 2021 | 5 | 8 | 8.1 | 10.8 | 12.6 | 11.9 | 13.2 | 13.6 | 14.9 | - | 15.3 | 16.9 | 22.2 |
| 2021 | 5 | 9 | 6.4 | 9.6 | 13.6 | 9.4 | 11.8 | 10.3 | 9.0 | - | 12.2 | 17.1 | 21.3 |
| 2021 | 5 | 10 | 6.0 | 9.3 | 10.3 | 8.1 | 10.4 | 9.6 | 7.7 | - | 11.9 | 15.8 | 21.9 |
| 2021 | 5 | 11 | 4.4 | 8.0 | 11.4 | 13.0 | 8.4 | 12.5 | 12.2 | - | 15.6 | 18.2 | 23.2 |
| 2021 | 5 | 12 | 3.8 | 7.3 | 11.0 | 13.7 | 7.6 | 12.2 | 13.2 | - | 16.3 | 19.7 | 24.3 |
| 2021 | 5 | 13 | 7.8 | 11.4 | 14.1 | 14.5 | 12.0 | 15.0 | 15.8 | - | 16.9 | 20.0 | 24.9 |
| 2021 | 5 | 14 | 7.9 | 12.9 | 16.1 | 16.3 | 13.6 | 17.6 | 17.2 | - | 18.4 | 19.9 | 24.2 |
| 2021 | 5 | 15 | 6.6 | 10.7 | 16.1 | 17.9 | 12.4 | 18.3 | 17.9 | - | 20.3 | 20.9 | 25.0 |
| 2021 | 5 | 16 | 11.6 | 16.1 | 16.0 | 16.9 | 16.9 | 18.6 | 19.3 | - | 22.7 | 21.7 | 24.9 |
| 2021 | 5 | 17 | 11.7 | 16.4 | 19.7 | 17.7 | 14.6 | 19.3 | 18.6 | - | 18.5 | 20.1 | 25.1 |
| 2021 | 5 | 18 | 10.7 | 13.6 | 16.4 | 18.8 | 13.4 | 19.5 | 17.7 | - | 17.2 | 19.2 | 25.3 |
| 2021 | 5 | 19 | 10.2 | 13.5 | 15.9 | 18.5 | 13.2 | 18.9 | 17.3 | - | 17.0 | 19.0 | 25.3 |
| 2021 | 5 | 20 | 13.0 | 13.8 | 15.6 | 16.5 | 13.9 | 17.4 | 16.6 | - | 18.0 | 20.2 | 25.2 |
| 2021 | 5 | 21 | 12.1 | 14.2 | 16.9 | 17.1 | 16.2 | 17.2 | 14.4 | - | 15.2 | 17.0 | 25.4 |
| 2021 | 5 | 22 | 13.1 | 13.6 | 17.2 | 14.6 | 14.8 | 15.5 | 14.3 | - | 15.8 | 15.1 | 25.0 |
| 2021 | 5 | 23 | 12.8 | 13.6 | 15.0 | 14.5 | 14.0 | 16.2 | 13.4 | - | 15.1 | 13.5 | 24.9 |
| 2021 | 5 | 24 | 12.2 | 12.8 | 14.7 | 15.2 | 12.5 | 15.8 | 16.5 | - | 16.1 | 17.4 | 24.3 |
| 2021 | 5 | 25 | 9.9 | 13.7 | 16.0 | 13.2 | 13.0 | 13.7 | 15.1 | - | 14.5 | 16.8 | 22.7 |
| 2021 | 5 | 26 | 8.5 | 11.5 | 14.6 | 11.7 | 12.7 | 12.2 | 13.9 | - | 13.8 | 17.2 | 23.2 |
| 2021 | 5 | 27 | 8.4 | 12.0 | 15.7 | 12.9 | 12.8 | 13.8 | 14.0 | - | 14.7 | 18.1 | 25.3 |
| 2021 | 5 | 28 | 10.5 | 13.9 | 14.7 | 15.1 | 15.1 | 16.7 | 14.2 | - | 16.1 | 17.8 | 24.5 |
| 2021 | 5 | 29 | 10.3 | 14.4 | 17.2 | 15.2 | 14.1 | 16.0 | 13.9 | - | 15.2 | 16.6 | 20.7 |
| 2021 | 5 | 30 | 8.4 | 11.9 | 15.1 | 14.0 | 12.3 | 14.7 | 12.7 | - | 12.7 | 16.6 | 20.5 |
| 2021 | 5 | 31 | 7.2 | 10.5 | 15.2 | 13.2 | 10.9 | 13.5 | 12.6 | - | 15.7 | 16.0 | 23.0 |
| 2021 | 6 | 1 | 7.4 | 13.4 | 15.1 | 17.1 | 13.2 | 15.3 | 13.7 | - | 15.9 | 18.8 | 22.9 |
| 2021 | 6 | 2 | 9.4 | 15.6 | 17.9 | 17.4 | 14.3 | 17.6 | 16.9 | - | 19.1 | 19.2 | 23.8 |
| 2021 | 6 | 3 | 11.6 | 16.1 | 17.5 | 16.8 | 16.4 | 17.0 | 15.8 | - | 18.7 | 20.9 | 25.5 |
| 2021 | 6 | 4 | 11.5 | 16.3 | 19.5 | 15.7 | 15.5 | 16.9 | 16.4 | - | 16.1 | 18.5 | 27.0 |
| 2021 | 6 | 5 | 10.0 | 14.5 | 18.8 | 14.2 | 15.0 | 15.9 | 13.4 | - | 14.9 | 15.5 | 25.9 |
| 2021 | 6 | 6 | 13.1 | 15.4 | 18.6 | 16.8 | 14.4 | 16.5 | 14.9 | - | 15.9 | 16.5 | 23.9 |
| 2021 | 6 | 7 | 12.9 | 17.1 | 17.8 | 18.3 | 16.9 | 19.3 | 16.5 | - | 17.8 | 19.1 | 23.3 |
| 2021 | 6 | 8 | 12.8 | 16.3 | 18.0 | 17.9 | 16.3 | 18.1 | 17.5 | - | 19.8 | 19.9 | 23.9 |
| 2021 | 6 | 9 | 12.8 | 15.1 | 16.1 | 16.5 | 15.9 | 17.8 | 17.3 | - | 20.9 | 21.7 | 23.9 |
| 2021 | 6 | 10 | 13.0 | 15.6 | 16.4 | 17.8 | 16.9 | 20.4 | 17.5 | - | 20.3 | 21.0 | 23.8 |
| 2021 | 6 | 11 | 13.8 | 16.8 | 18.7 | 18.2 | 17.4 | 18.0 | 18.3 | - | 20.7 | 22.1 | 24.7 |
| 2021 | 6 | 12 | 16.9 | 16.8 | 18.3 | 19.0 | 18.4 | 19.2 | 19.0 | - | 21.3 | 23.0 | 25.6 |
| 2021 | 6 | 13 | 15.7 | 18.9 | 19.3 | 19.8 | 17.9 | 20.2 | 20.0 | - | 22.1 | 22.7 | 25.0 |
| 2021 | 6 | 14 | 13.8 | 19.1 | 18.8 | 19.8 | 18.7 | 20.4 | 20.3 | - | 21.6 | 21.8 | 24.3 |
| 2021 | 6 | 15 | 13.4 | 18.8 | 18.7 | 19.7 | 18.1 | 20.6 | 20.6 | - | 20.4 | 21.7 | 24.3 |
| 2021 | 6 | 16 | 13.6 | 18.3 | 19.6 | 19.8 | 17.6 | 19.3 | 19.5 | - | 20.0 | 20.6 | 27.0 |
| 2021 | 6 | 17 | 12.8 | 17.2 | 17.1 | 18.1 | 17.8 | 19.0 | 18.4 | - | 19.6 | 20.7 | 26.5 |
| 2021 | 6 | 18 | 13.6 | 15.9 | 16.3 | 17.6 | 17.5 | 19.9 | 20.1 | - | 21.4 | 21.8 | 26.6 |
| 2021 | 6 | 19 | 12.0 | 18.2 | 19.4 | 19.1 | 19.1 | 19.7 | 18.7 | - | 20.2 | 21.1 | 26.0 |
| 2021 | 6 | 20 | 12.0 | 16.0 | 18.0 | 17.0 | 16.9 | 17.7 | 16.4 | - | 18.0 | 20.4 | 25.6 |
| 2021 | 6 | 21 | 13.5 | 14.9 | 17.9 | 16.1 | 17.3 | 17.1 | 16.7 | - | 17.7 | 19.0 | 25.5 |
| 2021 | 6 | 22 | 12.3 | 17.9 | 18.5 | 18.5 | 17.3 | 19.5 | 17.8 | - | 20.1 | 21.6 | 23.9 |
| 2021 | 6 | 23 | 10.9 | 16.8 | 19.6 | 19.9 | 18.6 | 18.9 | 17.9 | - | 19.1 | 20.2 | 22.4 |
| 2021 | 6 | 24 | 15.2 | 17.4 | 18.6 | 19.4 | 18.0 | 18.7 | 18.3 | - | 20.0 | 21.6 | 22.6 |
| 2021 | 6 | 25 | 15.7 | 17.8 | 19.7 | 19.2 | 17.7 | 20.7 | 18.8 | - | 20.1 | 20.8 | 23.9 |
| 2021 | 6 | 26 | 14.2 | 19.0 | 19.6 | 20.5 | 19.7 | 20.8 | 19.6 | - | 20.8 | 20.4 | 26.1 |
| 2021 | 6 | 27 | 15.8 | 19.5 | 20.1 | 20.9 | 19.8 | 20.0 | 20.4 | - | 21.6 | 19.7 | 24.4 |
| 2021 | 6 | 28 | 16.8 | 19.4 | 18.6 | 21.1 | 20.0 | 19.8 | 19.6 | - | 21.4 | 21.6 | 24.7 |
| 2021 | 6 | 29 | 15.7 | 17.6 | 18.8 | 20.7 | 19.5 | 20.1 | 20.3 | - | 21.8 | 22.3 | 23.6 |
| 2021 | 6 | 30 | 16.7 | 16.7 | 18.5 | 20.0 | 19.0 | 20.2 | 20.3 | - | 21.0 | 23.1 | 23.6 |
| 2021 | 7 | 1 | 16.2 | 18.6 | 20.3 | 21.2 | 19.8 | 21.2 | 21.6 | - | 22.8 | 23.1 | 24.6 |
| 2021 | 7 | 2 | 16.2 | 18.6 | 20.5 | 21.9 | 20.9 | 21.8 | 22.4 | - | 23.7 | 23.7 | 26.5 |
| 2021 | 7 | 3 | 14.9 | 17.8 | 19.8 | 23.8 | 22.1 | 24.0 | 22.3 | - | 23.6 | 23.1 | 26.0 |
| 2021 | 7 | 4 | 14.7 | 17.7 | 19.4 | 24.0 | 20.9 | 24.0 | 22.8 | - | 25.0 | 25.4 | 26.9 |
| 2021 | 7 | 5 | 15.6 | 18.8 | 20.0 | 23.8 | 21.2 | 24.8 | 23.7 | - | 25.4 | 25.6 | 26.6 |
| 2021 | 7 | 6 | 17.9 | 20.3 | 21.9 | 23.6 | 20.9 | 24.5 | 23.8 | - | 25.2 | 25.5 | 26.7 |
| 2021 | 7 | 7 | 18.1 | 20.8 | 22.8 | 23.6 | 20.7 | 23.2 | 22.3 | - | 25.9 | 26.2 | 27.1 |
| 2021 | 7 | 8 | 17.3 | 20.5 | 22.3 | 23.4 | 20.8 | 23.4 | 22.6 | - | 24.9 | 26.1 | 26.0 |
| 2021 | 7 | 9 | 16.7 | 20.3 | 22.3 | 23.8 | 21.9 | 24.6 | 22.3 | - | 24.6 | 25.8 | 25.8 |
| 2021 | 7 | 10 | 16.0 | 19.8 | 22.7 | 24.0 | 22.6 | 23.9 | 21.3 | - | 23.2 | 22.5 | 26.0 |
| 2021 | 7 | 11 | 17.1 | 19.8 | 21.0 | 23.7 | 21.0 | 23.0 | 20.8 | - | 23.0 | 22.6 | 26.6 |
| 2021 | 7 | 12 | 18.9 | 20.6 | 20.9 | 21.5 | 21.5 | 22.1 | 22.2 | - | 24.7 | 23.8 | 26.3 |
| 2021 | 7 | 13 | 18.5 | 21.1 | 22.4 | 20.6 | 21.6 | 21.7 | 21.7 | - | 24.8 | 23.8 | 25.7 |
| 2021 | 7 | 14 | 17.1 | 20.5 | 22.1 | 21.0 | 21.1 | 21.1 | 23.5 | - | 23.9 | 23.7 | 25.8 |
| 2021 | 7 | 15 | 17.2 | 20.6 | 22.1 | 21.5 | 21.7 | 20.5 | 21.1 | - | 21.8 | 22.7 | 26.2 |
| 2021 | 7 | 16 | 18.2 | 21.9 | 23.2 | 22.7 | 22.0 | 22.2 | 20.7 | - | 22.6 | 23.1 | 25.6 |
| 2021 | 7 | 17 | 19.9 | 22.2 | 22.1 | 22.1 | 24.1 | 22.8 | 21.6 | - | 22.6 | 22.7 | 25.3 |
| 2021 | 7 | 18 | 20.2 | 22.3 | 22.9 | 22.8 | 23.0 | 22.8 | 22.9 | - | 23.1 | 23.4 | 26.4 |
| 2021 | 7 | 19 | 20.8 | 22.6 | 23.7 | 23.7 | 23.8 | 23.6 | 22.5 | - | 24.2 | 23.7 | 26.0 |
| 2021 | 7 | 20 | 22.4 | 23.2 | 23.6 | 24.4 | 23.3 | 24.3 | 22.3 | - | 23.0 | 24.2 | 24.5 |
| 2021 | 7 | 21 | 21.4 | 23.2 | 23.3 | 24.0 | 24.0 | 22.5 | 22.5 | - | 23.0 | 23.9 | 25.6 |
| 2021 | 7 | 22 | 20.3 | 23.3 | 23.3 | 24.2 | 23.8 | 22.2 | 21.0 | - | 23.1 | 24.9 | 25.3 |
| 2021 | 7 | 23 | 20.1 | 23.0 | 23.4 | 24.4 | 24.5 | 23.2 | 22.1 | - | 23.2 | 24.8 | 25.5 |
| 2021 | 7 | 24 | 21.4 | 23.0 | 23.6 | 22.9 | 23.2 | 24.7 | 23.0 | - | 23.1 | 25.1 | 26.0 |
| 2021 | 7 | 25 | 20.8 | 22.7 | 23.3 | 23.2 | 23.1 | 23.7 | 22.1 | - | 22.0 | 24.2 | 26.2 |
| 2021 | 7 | 26 | 19.6 | 21.4 | 22.3 | 24.0 | 23.2 | 24.0 | 22.0 | - | 22.2 | 24.1 | 26.4 |
| 2021 | 7 | 27 | 18.4 | 20.9 | 21.0 | 23.6 | 23.4 | 23.6 | 22.3 | - | 23.4 | 23.5 | 26.4 |
| 2021 | 7 | 28 | 20.9 | 21.3 | 22.4 | 23.8 | 23.2 | 22.8 | 22.6 | - | 23.3 | 23.6 | 26.5 |
| 2021 | 7 | 29 | 22.6 | 22.5 | 23.3 | 24.1 | 22.7 | 24.3 | 22.5 | - | 23.8 | 24.3 | 25.9 |
| 2021 | 7 | 30 | 21.7 | 23.1 | 23.6 | 24.0 | 22.4 | 23.7 | 23.6 | - | 22.5 | 24.2 | 26.2 |
| 2021 | 7 | 31 | 21.0 | 23.0 | 23.1 | 23.9 | 23.1 | 23.8 | 21.8 | - | 23.8 | 24.9 | 26.6 |
| 2021 | 8 | 1 | 22.9 | 23.4 | 23.5 | 24.1 | 24.2 | 24.1 | 23.1 | - | 25.6 | 24.8 | 26.3 |
| 2021 | 8 | 2 | 22.8 | 23.3 | 24.4 | 23.8 | 24.1 | 24.1 | 23.7 | - | 25.3 | 25.2 | 26.1 |
| 2021 | 8 | 3 | 22.4 | 24.2 | 25.1 | 25.1 | 25.2 | 24.8 | 23.8 | - | 24.8 | 24.7 | 25.9 |
| 2021 | 8 | 4 | 23.8 | 24.9 | 24.4 | 24.3 | 26.2 | 24.6 | 23.8 | - | 24.2 | 25.4 | 25.5 |
| 2021 | 8 | 5 | 22.9 | 24.5 | 23.2 | 25.6 | 26.1 | 25.5 | 24.2 | - | 23.9 | 24.5 | 25.8 |
| 2021 | 8 | 6 | 23.6 | 24.5 | 23.7 | 25.3 | 25.3 | 22.6 | 24.2 | - | 22.6 | 23.9 | 26.1 |
| 2021 | 8 | 7 | 23.5 | 24.0 | 25.2 | 24.6 | 24.1 | 25.1 | 24.3 | - | 25.7 | 24.8 | 26.7 |
| 2021 | 8 | 8 | 22.7 | 25.0 | 24.5 | 24.0 | 25.0 | 25.3 | 24.0 | - | 23.3 | 25.0 | 24.9 |
| 2021 | 8 | 9 | 17.8 | 24.6 | 25.3 | 23.6 | 25.0 | 24.1 | 22.3 | - | 23.6 | 23.7 | 26.2 |
| 2021 | 8 | 10 | 13.2 | 20.9 | 23.5 | 22.6 | 22.7 | 22.9 | 21.5 | - | 22.8 | 23.4 | 26.4 |
| 2021 | 8 | 11 | 12.3 | 17.8 | 22.8 | 22.1 | 21.6 | 22.1 | 21.2 | - | 20.7 | 24.1 | 26.4 |
| 2021 | 8 | 12 | 12.2 | 17.4 | 23.2 | 22.7 | 21.2 | 22.8 | 21.2 | - | 22.9 | 24.7 | 25.6 |
| 2021 | 8 | 13 | 13.6 | 17.1 | 20.4 | 22.5 | 20.3 | 23.0 | 22.7 | - | 22.9 | 25.4 | 25.7 |
| 2021 | 8 | 14 | 13.2 | 16.6 | 20.0 | 24.1 | 19.4 | 22.7 | 20.9 | - | 22.5 | 25.6 | 26.3 |
| 2021 | 8 | 15 | 15.3 | 16.6 | 18.5 | 22.7 | 19.2 | 21.6 | 20.8 | - | 22.2 | 25.2 | 25.9 |
| 2021 | 8 | 16 | 15.8 | 17.4 | 19.1 | 22.0 | 19.3 | 21.8 | 20.8 | - | 22.6 | 23.1 | 26.1 |
| 2021 | 8 | 17 | 16.0 | 17.8 | 20.7 | 22.0 | 19.6 | 22.8 | 22.2 | - | 22.5 | 23.7 | 26.3 |
| 2021 | 8 | 18 | 16.4 | 21.7 | 23.7 | 23.5 | 22.0 | 22.5 | 21.5 | - | 22.2 | 23.0 | 24.9 |
| 2021 | 8 | 19 | 16.4 | 21.4 | 23.7 | 21.9 | 21.1 | 21.4 | 21.5 | - | 21.2 | 22.6 | 25.6 |
| 2021 | 8 | 20 | 13.4 | 22.1 | 23.6 | 22.2 | 22.4 | 21.5 | 22.4 | - | 22.4 | 22.7 | 25.8 |
| 2021 | 8 | 21 | 14.9 | 22.2 | 23.5 | 22.3 | 23.1 | 21.8 | 22.8 | - | 23.1 | 22.2 | 25.7 |
| 2021 | 8 | 22 | 16.8 | 23.0 | 24.4 | 23.9 | 22.6 | 23.7 | 23.7 | - | 24.8 | 25.1 | 24.6 |
| 2021 | 8 | 23 | 18.2 | 20.7 | 21.3 | 23.5 | 23.0 | 24.8 | 23.8 | - | 24.4 | 25.4 | 24.9 |
| 2021 | 8 | 24 | 19.0 | 20.1 | 23.2 | 23.1 | 22.2 | 24.5 | 24.0 | - | 24.8 | 25.9 | 26.0 |
| 2021 | 8 | 25 | 18.6 | 22.0 | 24.8 | 24.3 | 23.2 | 25.6 | 24.4 | - | 25.3 | 25.4 | 25.4 |
| 2021 | 8 | 26 | 19.7 | 24.0 | 25.5 | 25.2 | 24.8 | 25.6 | 24.2 | - | 23.9 | 24.4 | 25.6 |
| 2021 | 8 | 27 | 18.2 | 23.3 | 25.6 | 20.6 | 22.5 | 21.2 | 23.2 | - | 24.7 | 24.8 | 25.2 |
| 2021 | 8 | 28 | 19.3 | 20.9 | 24.4 | 20.9 | 21.9 | 25.3 | 23.2 | - | 23.5 | 23.7 | 24.7 |
| 2021 | 8 | 29 | 18.2 | 19.1 | 24.1 | 23.5 | 21.1 | 24.7 | 22.3 | - | 23.4 | 23.2 | 25.7 |
| 2021 | 8 | 30 | 17.5 | 20.6 | 24.8 | 23.3 | 21.5 | 25.0 | 22.3 | - | 24.1 | 23.6 | 25.6 |
| 2021 | 8 | 31 | 16.3 | 18.7 | 20.8 | 22.5 | 19.5 | 21.5 | 22.9 | - | 24.3 | 24.1 | 24.9 |
| 2021 | 9 | 1 | 14.4 | 16.8 | 17.9 | 22.2 | 17.9 | 21.5 | 23.8 | - | 24.2 | 23.9 | 24.4 |
| 2021 | 9 | 2 | 14.2 | 16.2 | 18.2 | 22.9 | 17.8 | 21.7 | 22.3 | - | 23.1 | 24.0 | 25.5 |
| 2021 | 9 | 3 | 14.3 | 17.2 | 18.7 | 22.0 | 18.2 | 21.4 | 21.5 | - | 23.4 | 24.1 | 25.1 |
| 2021 | 9 | 4 | 14.5 | 16.8 | 19.1 | 21.9 | 18.5 | 21.5 | 20.7 | - | 22.3 | 24.7 | 25.4 |
| 2021 | 9 | 5 | 15.4 | 16.2 | 18.6 | 21.5 | 18.2 | 20.6 | 20.1 | - | 21.9 | 25.1 | 26.6 |
| 2021 | 9 | 6 | 14.5 | 15.4 | 17.4 | 20.6 | 16.6 | 20.1 | 19.7 | - | 20.8 | 24.4 | 26.1 |
| 2021 | 9 | 7 | 13.2 | 13.7 | 15.8 | 19.9 | 14.7 | 19.5 | 19.3 | - | 22.3 | 23.3 | 25.2 |
| 2021 | 9 | 8 | 16.1 | 15.3 | 15.5 | 19.1 | 16.0 | 21.1 | 22.1 | - | 22.1 | 22.3 | 25.3 |
| 2021 | 9 | 9 | 16.4 | 17.2 | 18.1 | 20.1 | 18.5 | 20.5 | 20.4 | - | 20.9 | 21.4 | 25.0 |
| 2021 | 9 | 10 | 16.9 | 18.4 | 20.6 | 18.8 | 20.3 | 19.6 | 19.6 | - | 21.7 | 21.6 | 26.1 |
| 2021 | 9 | 11 | 15.0 | 20.7 | 22.1 | 20.9 | 19.4 | 21.5 | 21.8 | - | 21.4 | 23.0 | 25.1 |
| 2021 | 9 | 12 | 14.5 | 18.0 | 22.5 | 22.2 | 18.5 | 22.3 | 21.3 | - | 22.2 | 23.3 | 26.7 |
| 2021 | 9 | 13 | 12.0 | 15.9 | 20.2 | 19.9 | 16.4 | 19.2 | 21.4 | - | 22.7 | 23.1 | 24.1 |
| 2021 | 9 | 14 | 10.2 | 14.7 | 20.1 | 19.3 | 15.2 | 18.7 | 18.2 | - | 21.7 | 23.0 | 25.4 |
| 2021 | 9 | 15 | 10.7 | 17.3 | 19.2 | 19.6 | 16.0 | 19.2 | 18.7 | - | 21.9 | 23.6 | 25.8 |
| 2021 | 9 | 16 | 9.3 | 16.2 | 17.9 | 20.0 | 15.7 | 19.1 | 17.8 | - | 22.3 | 24.1 | 26.0 |
| 2021 | 9 | 17 | 13.0 | 16.3 | 17.0 | 20.3 | 17.1 | 21.4 | 20.5 | - | 23.0 | 23.6 | 25.7 |
| 2021 | 9 | 18 | 15.9 | 19.3 | 21.9 | 21.7 | 19.7 | 21.3 | 19.7 | - | 21.1 | 21.4 | 24.7 |
| 2021 | 9 | 19 | 12.1 | 16.8 | 17.8 | 20.5 | 18.0 | 20.5 | 19.0 | - | 20.7 | 20.0 | 23.8 |
| 2021 | 9 | 20 | 11.0 | 14.5 | 16.6 | 20.0 | 16.0 | 20.4 | 17.6 | - | 20.1 | 22.2 | 22.6 |
| 2021 | 9 | 21 | 12.0 | 15.2 | 17.6 | 18.2 | 16.1 | 19.4 | 18.6 | - | 21.2 | 22.9 | 24.2 |
| 2021 | 9 | 22 | 18.4 | 17.6 | 19.3 | 20.8 | 18.6 | 21.4 | 18.8 | - | 21.5 | 21.5 | 25.7 |
| 2021 | 9 | 23 | 15.4 | 17.9 | 21.4 | 19.4 | 17.4 | 20.5 | 17.1 | - | 18.6 | 19.7 | 25.3 |
| 2021 | 9 | 24 | 11.5 | 15.1 | 18.7 | 17.9 | 16.2 | 18.5 | 16.1 | - | 17.8 | 20.4 | 23.9 |
| 2021 | 9 | 25 | 10.0 | 15.2 | 17.9 | 18.6 | 13.3 | 18.4 | 16.8 | - | 17.9 | 20.0 | 23.9 |
| 2021 | 9 | 26 | 9.6 | 16.1 | 16.7 | 18.5 | 15.7 | 18.1 | 19.0 | - | 20.1 | 21.9 | 26.4 |
| 2021 | 9 | 27 | 11.3 | 14.7 | 16.2 | 17.8 | 15.7 | 17.6 | 18.6 | - | 20.3 | 21.9 | 25.1 |
| 2021 | 9 | 28 | 12.5 | 14.3 | 15.6 | 17.6 | 15.6 | 18.9 | 20.6 | - | 21.1 | 23.2 | 24.2 |
| 2021 | 9 | 29 | 15.5 | 16.1 | 16.2 | 18.6 | 16.9 | 20.3 | 20.5 | - | 22.0 | 23.4 | 26.0 |
| 2021 | 9 | 30 | 15.5 | 18.2 | 18.4 | 19.6 | 17.9 | 20.1 | 19.9 | - | 21.2 | 22.7 | 25.6 |
| 2021 | 10 | 1 | 13.5 | 13.5 | 15.9 | 19.5 | 17.9 | 18.5 | 18.2 | - | 21.1 | 20.7 | 24.8 |
| 2021 | 10 | 2 | 12.8 | 14.6 | 14.3 | 17.4 | 16.7 | 17.6 | 16.5 | - | 19.2 | 19.3 | 23.3 |
| 2021 | 10 | 3 | 11.2 | 15.0 | 18.0 | 15.3 | 15.8 | 17.2 | 15.4 | - | 17.2 | 19.4 | 23.2 |
| 2021 | 10 | 4 | 15.3 | 14.2 | 17.3 | 18.8 | 15.0 | 16.8 | 15.4 | - | 17.4 | 20.4 | 23.4 |
| 2021 | 10 | 5 | 11.3 | 15.8 | 18.2 | 18.2 | 16.4 | 19.9 | 16.6 | - | 18.4 | 21.0 | 23.7 |
| 2021 | 10 | 6 | 8.6 | 14.8 | 18.1 | 17.4 | 15.3 | 18.2 | 16.6 | - | 17.2 | 19.1 | 25.1 |
| 2021 | 10 | 7 | 7.3 | 13.2 | 17.7 | 20.0 | 13.7 | 18.2 | 19.0 | - | 18.3 | 19.2 | 24.7 |
| 2021 | 10 | 8 | 9.5 | 16.7 | 19.2 | 20.4 | 18.7 | 20.8 | 18.0 | - | 19.1 | 22.0 | 23.8 |
| 2021 | 10 | 9 | 9.0 | 16.8 | 18.9 | 19.9 | 18.0 | 20.0 | 19.0 | - | 20.8 | 22.4 | 24.1 |
| 2021 | 10 | 10 | 9.9 | 16.8 | 18.2 | 19.0 | 18.1 | 19.8 | 18.3 | - | 21.3 | 23.1 | 25.3 |
| 2021 | 10 | 11 | 9.1 | 16.0 | 18.5 | 18.4 | 16.3 | 20.0 | 18.7 | - | 20.3 | 24.0 | 25.6 |
| 2021 | 10 | 12 | 7.2 | 13.8 | 17.4 | 21.2 | 16.4 | 20.8 | 21.1 | - | 22.4 | 23.9 | 24.8 |
| 2021 | 10 | 13 | 7.8 | 13.8 | 16.3 | 20.1 | 15.3 | 18.7 | 19.8 | - | 21.0 | 24.0 | 24.4 |
| 2021 | 10 | 14 | 6.7 | 12.7 | 15.5 | 17.7 | 13.9 | 17.2 | 17.5 | - | 17.8 | 22.0 | 24.0 |
| 2021 | 10 | 15 | 8.1 | 12.5 | 15.9 | 15.7 | 15.7 | 16.4 | 15.6 | - | 16.8 | 19.9 | 23.3 |
| 2021 | 10 | 16 | 6.9 | 13.3 | 18.2 | 16.8 | 15.6 | 16.2 | 14.4 | - | 15.8 | 19.1 | 23.7 |
| 2021 | 10 | 17 | 3.2 | 6.6 | 9.1 | 9.6 | 8.5 | 11.4 | 10.3 | - | 13.1 | 13.5 | 19.2 |
| 2021 | 10 | 18 | 2.7 | 5.3 | 7.3 | 8.4 | 7.5 | 10.1 | 8.8 | - | 12.3 | 12.2 | 18.9 |
| 2021 | 10 | 19 | 2.8 | 8.7 | 10.2 | 12.5 | 9.0 | 13.1 | 10.2 | - | 11.7 | 13.6 | 20.4 |
| 2021 | 10 | 20 | 7.7 | 8.8 | 9.5 | 8.9 | 9.5 | 10.0 | 9.3 | - | 11.9 | 11.9 | 19.5 |
| 2021 | 10 | 21 | 4.1 | 7.6 | 8.7 | 7.6 | 8.5 | 9.3 | 8.6 | - | 11.2 | 13.4 | 20.6 |
| 2021 | 10 | 22 | 3.0 | 6.4 | 10.0 | 9.6 | 8.8 | 10.7 | 10.5 | - | 12.2 | 11.1 | 18.3 |
| 2021 | 10 | 23 | 3.5 | 6.7 | 6.4 | 8.3 | 9.1 | 9.0 | 8.3 | - | 10.5 | 11.0 | 18.2 |
| 2021 | 10 | 24 | 3.5 | 5.6 | 5.5 | 7.9 | 8.4 | 8.2 | 7.4 | - | 9.4 | 12.9 | 18.9 |
| 2021 | 10 | 25 | 4.1 | 6.9 | 9.1 | 12.3 | 7.1 | 12.5 | 9.2 | - | 11.7 | 12.8 | 20.2 |
| 2021 | 10 | 26 | 6.5 | 9.2 | 10.9 | 11.5 | 11.9 | 11.8 | 8.5 | - | 11.4 | 10.3 | 18.2 |
| 2021 | 10 | 27 | 7.2 | 7.6 | 11.5 | 11.2 | 10.2 | 11.8 | 11.1 | - | 11.8 | 11.8 | 17.9 |
| 2021 | 10 | 28 | 7.6 | 8.7 | 10.1 | 10.0 | 9.9 | 11.2 | 9.9 | - | 11.3 | 10.4 | 17.7 |
| 2021 | 10 | 29 | 7.0 | 6.5 | 8.6 | 8.2 | 10.2 | 9.9 | 8.7 | - | 11.6 | 12.5 | 16.7 |
| 2021 | 10 | 30 | 3.3 | 6.1 | 6.8 | 8.2 | 9.7 | 9.5 | 7.9 | - | 10.9 | 12.8 | 18.2 |
| 2021 | 10 | 31 | 4.4 | 8.1 | 9.9 | 12.1 | 9.3 | 13.8 | 13.2 | - | 13.0 | 16.6 | 19.1 |
夜間の日最低暑さ指数(WBGT)とは？*2
上の図は、各観測地点における、5月から10月までの毎日の暑さ指数（WBGT）の最低値（毎時の24個の値の最低）を表にまとめたもので、夜間の熱中症のおおよその危険度を確認することができます。
期間は2021年から2025年までの過去5年間で、一番左の列に5年間の最高値（各観測地点の5個の値の最高）を掲載しています。（※それぞれの列をクリックすると拡大して閲覧できます）
*2 日最低暑さ指数が主に早朝に記録されることが多いため、「夜間の～」と表記しています。まれに昼間に記録されることもあります。
夜間の日最低暑さ指数(WBGT)の活用例
夜間でも暑さ指数(WBGT)が高いと、特に高齢者を中心として、室内での熱中症発生の危険性が高くなります。チェックポイントの例を以下に示します。
(1) 黄色 の期間（暑さ指数が25以上）をチェックする
黄色 は、夜間でも熱中症の発生に警戒が必要となった期間です。
このような期間には、朝方など涼しい時間帯に換気を行い室内の温度を下げることや、暑さを我慢せず積極的に空調設備を使うことなどの、対処方法が推奨されています。
暑くなる前から、十分に換気が行えるように、また、すぐに空調設備が使用できるように、準備してください。
暑さ指数が高い期間は、こまめに室内の温度をチェックし、換気や空調を行ってください。
参考
本サイトに掲載している対処方法等は、以下の資料に基づいています。あわせてご参照ください。