Click on a day for an hourly weather forecast
The weather in Hiroshima in August is very hot. The average temperatures are between 23°C and 30°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Hiroshima during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Hiroshima in August 2025.
If you’re planning to visit Hiroshima in the near future, we highly recommend that you review the 14 day weather forecast for Hiroshima before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 3° | 9 | 17 | 6 | 66 mm | Awful | Hiroshima in January |
| February | 9° / 3° | 6 | 18 | 4 | 87 mm | Bad | Hiroshima in February |
| March | 13° / 6° | 7 | 24 | 0 | 119 mm | Bad | Hiroshima in March |
| April | 17° / 9° | 6 | 24 | 0 | 121 mm | Good | Hiroshima in April |
| May | 22° / 14° | 6 | 25 | 0 | 142 mm | Good | Hiroshima in May |
| June | 25° / 18° | 9 | 21 | 0 | 232 mm | Good | Hiroshima in June |
| July | 28° / 22° | 10 | 21 | 0 | 283 mm | Good | Hiroshima in July |
| August | 30° / 23° | 7 | 24 | 0 | 193 mm | Ok | Hiroshima in August |
| September | 27° / 20° | 7 | 23 | 0 | 160 mm | Good | Hiroshima in September |
| October | 22° / 15° | 5 | 26 | 0 | 104 mm | Good | Hiroshima in October |
| November | 16° / 10° | 5 | 25 | 0 | 74 mm | Good | Hiroshima in November |
| December | 10° / 5° | 7 | 21 | 3 | 83 mm | Awful | Hiroshima in December |