Climate at a glance · Hiroshima
Annual mean16°day and night
Precipitation1582 mma year
Warmest monthAugustavg high 31°
Coldest monthJanuaryavg low 0°
Average temperature by month
High · lowJanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation by month
1582 mm a yearJanFebMarAprMayJunJulAugSepOctNovDec
Monthly averages
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 9° | 10° | 14° | 19° | 22° | 25° | 30° | 31° | 29° | 23° | 17° | 11° |
| Avg low | 0° | 1° | 4° | 9° | 13° | 18° | 23° | 24° | 21° | 14° | 8° | 2° |
| Precip, mm | 42 | 71 | 131 | 149 | 177 | 208 | 182 | 289 | 157 | 60 | 87 | 29 |
| Wet days | 6 | 7 | 10 | 10 | 10 | 14 | 13 | 15 | 13 | 8 | 5 | 5 |
| Sunshine | 7.5 h | 7.8 h | 7.8 h | 8.6 h | 9 h | 8.5 h | 10.1 h | 10 h | 8.9 h | 8.3 h | 8.4 h | 7.8 h |
| Humidity | 70% | 70% | 73% | 73% | 76% | 83% | 83% | 80% | 79% | 74% | 74% | 71% |
| Sea temperature | 11° | 9° | 10° | 14° | 18° | 22° | 28° | 29° | 28° | 25° | 19° | 15° |
| Daylight | 10 h 09 | 10 h 57 | 11 h 59 | 13 h 03 | 13 h 57 | 14 h 25 | 14 h 12 | 13 h 25 | 12 h 23 | 11 h 19 | 10 h 23 | 9 h 54 |
| UV index (clear sky) | 4 | 6 | 8 | 10 | 11 | 12 | 11 | 11 | 9 | 6 | 4 | 4 |
5-year averages (2021–2025) · Open-Meteo historical weather (ERA5)
34.4000°N, 132.4500°E