Climate of Hiroshima Prefecture, Japan
Area-weighted average across Hiroshima Prefecture. For where people actually live and travel, see the cities below.
Hiroshima Prefecture, a subdivision of Japan, has a seasonal climate on average. Area-weighted monthly temperatures across the whole territory range from 2.6°C / 36.7°F in January to 25.5°C / 77.9°F in August, with rainfall from 60 mm / 2.4 in to 267 mm / 10.5 in depending on the season (1735 mm / 68.3 in total across the year). See the city listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 2.6°C36.7°F | 73 mm2.9″ | — |
| February | 2.9°C37.2°F | 81 mm3.2″ | — |
| March | 6.2°C43.2°F | 112 mm4.4″ | — |
| April | 11.9°C53.4°F | 152 mm6″ | — |
| May | 16.5°C61.7°F | 158 mm6.2″ | — |
| June | 20.4°C68.7°F | 267 mm10.5″ | — |
| July | 24.5°C76.1°F | 261 mm10.3″ | — |
| August | 25.5°C77.9°F | 161 mm6.3″ | — |
| September | 21.4°C70.5°F | 211 mm8.3″ | — |
| October | 15.6°C60.1°F | 119 mm4.7″ | — |
| November | 10.1°C50.2°F | 80 mm3.1″ | — |
| December | 5.1°C41.2°F | 60 mm2.4″ | — |
Frequently asked questions
What is the best time to visit Hiroshima Prefecture?
Hiroshima Prefecture, Japan does not have a clear sunny-and-dry window by our cutoffs. The warmest month is August at 25.5°C / 77.9°F, and the driest is December at 60 mm / 2.4 in — likely your best travel window. For city-level detail, see the cities section below.
What is the climate of Hiroshima Prefecture?
Hiroshima Prefecture, Japan has area-weighted monthly average temperatures ranging from 2.6°C / 36.7°F in January to 25.5°C / 77.9°F in August. Annual rainfall averages about 1735 mm / 68.3 in, with the wettest month being June (267 mm / 10.5 in) and the driest December (60 mm / 2.4 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Hiroshima Prefecture?
The hottest month in Hiroshima Prefecture is August, with an area-wide average temperature of 25.5°C / 77.9°F.
What is the coldest month in Hiroshima Prefecture?
The coldest month in Hiroshima Prefecture is January, with an area-wide average temperature of 2.6°C / 36.7°F.
When does it rain most in Hiroshima Prefecture?
The wettest month in Hiroshima Prefecture is June, averaging about 267 mm / 10.5 in of rainfall. The driest is December with about 60 mm / 2.4 in.