The weather in Hiroshima in September is hot. The average temperatures are between 20°C and 27°C.
You can expect about 3 to 8 days of rain in Hiroshima during the month of September. 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 September 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.
Temperatures
27° / 20°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
160
mm
Sun Hours
10.5
Hrs
