Heat Stress Index: WBGT
Current WBGT and Forecast
| Hokkaido | Tohoku | Kanto | Koshin |
| Tokai | Hokuriku | Kinki | Chugoku |
| Shikoku | Kyushu | Okinawa |
| (Blue) Almost safe | (Sky) Caution | (Yellow) Warning | (Orange) Severe Warning | (Red) Danger |
|---|---|---|---|---|
| < 21 appropriate water replenishment suggested |
21 - 25 water should be replenished often |
25 - 28 rests should be provided often |
28 - 31 heavy exercise prohibited |
≥ 31 exercise prohibited |
WBGT monitoring
As of May 16 4:00
Sapporo
10.3
Aomori
9.9
Akita
9.9
Morioka
9.7
Sendai
12.3
Yamagata
10.3
Fukushima
11.6
Mito
10.7
Utsunomiya
12.1
Maebashi
11.7
Kumagaya
12.9
Tokyo
14.8
Choshi
13.9
Yokohama
15.8
Nagano
10.4
Kofu
11.2
Shizuoka
13.3
Nagoya
14.9
Gifu
15.6
Tsu
17.0
Niigata
13.7
Toyama
12.8
Kanazawa
13.0
Fukui
13.3
Hikone
14.7
Kyoto
16.0
Osaka
16.7
Kobe
17.4
Nara
15.6
Wakayama
15.8
Okayama
13.5
Hiroshima
12.7
Matsue
14.3
Tottori
12.0
Shimonoseki
16.6
Tokushima
15.8
Takamatsu
14.7
Matsuyama
14.1
Kochi
16.6
Fukuoka
15.4
Oita
14.3
Nagasaki
16.3
Saga
15.5
Kumamoto
15.8
Miyazaki
17.1
Kagoshima
18.7
Naha
20.5
Daily Maximum WBGT and Forecast
| 05/16 | 05/17 | 05/18 | 05/16 06 | 05/16 09 | 05/16 12 | 05/16 15 | 05/16 18 | 05/16 21 | 05/16 24 | 05/17 03 | 05/17 06 | 05/17 09 | 05/17 12 | 05/17 15 | 05/17 18 | 05/17 21 | 05/17 24 | 05/18 03 | 05/18 06 | 05/18 09 | 05/18 12 | 05/18 15 | 05/18 18 | 05/18 21 | 05/18 24 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sapporo | 22 | 17 | 20 | 12 | 17 | 22 | 20 | 15 | 12 | 12 | 11 | 11 | 14 | 17 | 17 | 14 | 12 | 11 | 11 | 11 | 15 | 18 | 20 | 16 | 14 | 13 |
| Kushiro | 12 | 15 | 13 | 9 | 11 | 12 | 11 | 10 | 10 | 10 | 8 | 10 | 12 | 15 | 12 | 8 | 6 | 7 | 6 | 7 | 8 | 9 | 13 | 9 | 9 | 10 |
| Aomori | 20 | 21 | 22 | 11 | 17 | 18 | 20 | 15 | 12 | 11 | 9 | 11 | 18 | 21 | 18 | 15 | 15 | 15 | 13 | 13 | 17 | 20 | 22 | 18 | 16 | 13 |
| Sendai | 21 | 23 | 20 | 13 | 18 | 21 | 18 | 15 | 14 | 14 | 12 | 14 | 20 | 23 | 18 | 13 | 12 | 12 | 12 | 14 | 17 | 20 | 19 | 17 | 17 | 15 |
| Tokyo | 23 | 24 | 25 | 16 | 21 | 23 | 21 | 18 | 16 | 15 | 15 | 16 | 21 | 23 | 24 | 20 | 18 | 17 | 14 | 14 | 19 | 25 | 24 | 20 | 17 | 16 |
| Nagano | 23 | 21 | 23 | 12 | 18 | 20 | 23 | 18 | 14 | 12 | 10 | 11 | 17 | 19 | 21 | 18 | 16 | 14 | 12 | 13 | 19 | 22 | 23 | 20 | 18 | 16 |
| Nagoya | 24 | 23 | 26 | 17 | 22 | 23 | 24 | 19 | 18 | 18 | 17 | 17 | 21 | 22 | 23 | 19 | 19 | 19 | 18 | 18 | 22 | 26 | 23 | 20 | 20 | 18 |
| Niigata | 23 | 21 | 23 | 14 | 21 | 23 | 20 | 17 | 16 | 15 | 13 | 14 | 18 | 21 | 20 | 16 | 14 | 14 | 14 | 15 | 20 | 23 | 22 | 18 | 17 | 17 |
| Kanazawa | 25 | 24 | 25 | 14 | 20 | 25 | 23 | 20 | 18 | 16 | 15 | 15 | 21 | 24 | 22 | 18 | 18 | 16 | 16 | 16 | 23 | 25 | 22 | 20 | 18 | 16 |
| Osaka | 24 | 25 | 25 | 18 | 22 | 24 | 24 | 22 | 20 | 19 | 18 | 17 | 22 | 24 | 25 | 17 | 15 | 16 | 16 | 17 | 20 | 25 | 24 | 20 | 20 | 20 |
| Hiroshima | 25 | 24 | 22 | 15 | 21 | 25 | 24 | 19 | 20 | 17 | 15 | 11 | 17 | 22 | 24 | 21 | 22 | 19 | 16 | 15 | 19 | 20 | 22 | 22 | 22 | 20 |
| Matsue | 23 | 23 | 25 | 14 | 19 | 23 | 22 | 19 | 17 | 13 | 8 | 10 | 19 | 23 | 22 | 19 | 17 | 14 | 12 | 13 | 21 | 24 | 25 | 20 | 18 | 16 |
| Kochi | 26 | 26 | 26 | 16 | 21 | 26 | 25 | 22 | 20 | 18 | 15 | 14 | 23 | 26 | 25 | 23 | 20 | 18 | 15 | 14 | 21 | 26 | 24 | 22 | 20 | 18 |
| Fukuoka | 27 | 26 | 24 | 16 | 21 | 25 | 27 | 22 | 20 | 18 | 18 | 17 | 23 | 26 | 26 | 21 | 19 | 16 | 12 | 12 | 20 | 24 | 24 | 20 | 19 | 19 |
| Kagoshima | 26 | 28 | 24 | 19 | 22 | 24 | 26 | 22 | 19 | 19 | 17 | 17 | 22 | 25 | 28 | 24 | 21 | 18 | 17 | 17 | 21 | 24 | 24 | 22 | 21 | 20 |
| Naze | 23 | 25 | 24 | 19 | 22 | 22 | 23 | 20 | 18 | 18 | 17 | 18 | 23 | 24 | 25 | 22 | 19 | 19 | 18 | 18 | 23 | 24 | 23 | 21 | 19 | 19 |
| Naha | 25 | 24 | 25 | 20 | 22 | 24 | 25 | 20 | 20 | 19 | 19 | 19 | 21 | 23 | 24 | 21 | 20 | 20 | 20 | 20 | 23 | 24 | 25 | 22 | 21 | 21 |
| Ishigakijima | 28 | 28 | 28 | 21 | 24 | 26 | 28 | 25 | 22 | 22 | 21 | 21 | 25 | 26 | 28 | 25 | 21 | 21 | 21 | 22 | 25 | 27 | 28 | 26 | 24 | 24 |
Note
WBGT index is one of the empirical indices representing the heat stress to which an individual is exposed. (ISO7243)
WBGT varies depending on environmental situation and condition.
