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Heat Stress Index: WBGT
Current WBGT and Forecast
Select the location
| (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 Aug 9 21:00
Sapporo
17.9
Aomori
20.9
Akita
24.1
Morioka
20.9
Sendai
23.5
Yamagata
21.2
Fukushima
23.8
Mito
23.6
Utsunomiya
22.2
Maebashi
22.3
Kumagaya
22.2
Tokyo
23.9
Choshi
24.1
Yokohama
24.8
Nagano
23.1
Kofu
24.4
Shizuoka
26.0
Nagoya
24.8
Gifu
25.0
Tsu
25.3
Niigata
24.5
Toyama
24.4
Kanazawa
23.8
Fukui
24.9
Hikone
26.2
Kyoto
25.7
Osaka
26.0
Kobe
26.3
Nara
25.5
Wakayama
26.1
Okayama
26.4
Hiroshima
25.3
Matsue
26.2
Tottori
25.9
Shimonoseki
25.6
Tokushima
25.8
Takamatsu
25.0
Matsuyama
25.2
Kochi
26.0
Fukuoka
26.0
Oita
25.2
Nagasaki
23.5
Saga
25.7
Kumamoto
24.3
Miyazaki
25.4
Kagoshima
25.0
Naha
27.8
Daily Maximum WBGT and Forecast
| 08/09 | 08/10 | 08/11 | 08/09 24 | 08/10 03 | 08/10 06 | 08/10 09 | 08/10 12 | 08/10 15 | 08/10 18 | 08/10 21 | 08/10 24 | 08/11 03 | 08/11 06 | 08/11 09 | 08/11 12 | 08/11 15 | 08/11 18 | 08/11 21 | 08/11 24 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sapporo | 23 | 23 | 26 | 19 | 18 | 18 | 21 | 23 | 21 | 19 | 18 | 16 | 15 | 16 | 21 | 23 | 26 | 24 | 22 | 22 |
| Kushiro | 24 | 21 | 26 | 16 | 15 | 16 | 19 | 21 | 19 | 16 | 15 | 16 | 17 | 18 | 21 | 26 | 22 | 20 | 19 | 20 |
| Aomori | 27 | 25 | 24 | 21 | 21 | 21 | 24 | 25 | 24 | 20 | 18 | 18 | 19 | 20 | 22 | 23 | 24 | 24 | 23 | 22 |
| Sendai | 28 | 26 | 24 | 22 | 22 | 22 | 24 | 26 | 25 | 21 | 19 | 20 | 18 | 18 | 20 | 21 | 23 | 24 | 22 | 20 |
| Tokyo | 31 | 29 | 27 | 24 | 23 | 24 | 27 | 28 | 29 | 23 | 21 | 21 | 21 | 22 | 27 | 25 | 21 | 23 | 22 | 22 |
| Nagano | 28 | 29 | 27 | 23 | 23 | 23 | 26 | 29 | 26 | 22 | 20 | 19 | 18 | 18 | 24 | 27 | 24 | 21 | 21 | 21 |
| Nagoya | 30 | 31 | 28 | 26 | 25 | 26 | 29 | 30 | 31 | 28 | 25 | 23 | 21 | 21 | 26 | 27 | 28 | 25 | 22 | 21 |
| Niigata | 29 | 28 | 25 | 23 | 22 | 22 | 25 | 28 | 27 | 24 | 21 | 21 | 20 | 21 | 25 | 22 | 24 | 24 | 23 | 23 |
| Kanazawa | 28 | 29 | 28 | 24 | 24 | 24 | 27 | 29 | 29 | 24 | 23 | 22 | 22 | 21 | 25 | 28 | 27 | 23 | 24 | 24 |
| Osaka | 30 | 32 | 28 | 27 | 26 | 26 | 29 | 31 | 32 | 25 | 24 | 24 | 24 | 23 | 27 | 27 | 28 | 25 | 22 | 22 |
| Hiroshima | 28 | 30 | 27 | 27 | 27 | 26 | 27 | 28 | 30 | 29 | 26 | 23 | 22 | 22 | 27 | 26 | 26 | 26 | 25 | 24 |
| Matsue | 29 | 28 | 29 | 26 | 26 | 25 | 27 | 28 | 27 | 24 | 23 | 24 | 23 | 22 | 26 | 28 | 29 | 22 | 20 | 22 |
| Kochi | 31 | 29 | 29 | 25 | 24 | 22 | 26 | 29 | 28 | 27 | 27 | 25 | 22 | 20 | 26 | 29 | 25 | 25 | 25 | 23 |
| Fukuoka | 29 | 30 | 30 | 26 | 26 | 25 | 27 | 30 | 29 | 28 | 28 | 27 | 26 | 25 | 28 | 30 | 30 | 26 | 25 | 24 |
| Kagoshima | 29 | 29 | 29 | 25 | 24 | 24 | 28 | 29 | 29 | 26 | 26 | 25 | 24 | 24 | 28 | 28 | 29 | 28 | 26 | 26 |
| Naze | 30 | 31 | 29 | 27 | 27 | 26 | 29 | 31 | 30 | 27 | 27 | 27 | 27 | 26 | 28 | 29 | 29 | 27 | 27 | 26 |
| Naha | 30 | 30 | 29 | 27 | 27 | 26 | 30 | 30 | 30 | 28 | 27 | 27 | 26 | 26 | 29 | 29 | 29 | 28 | 28 | 27 |
| Ishigakijima | 30 | 32 | 30 | 28 | 28 | 27 | 29 | 31 | 32 | 28 | 26 | 27 | 27 | 27 | 30 | 30 | 30 | 28 | 28 | 28 |
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.
