Yearly weather and climate in Hiroshima, Japan
The yearly weather in Hiroshima runs from around 1°C in January to 31°C in August. December is the driest month at 4 rainy days; July the wettest at 17. Here is the annual climate data, so you know what you are packing for.
Best time to visit
The best weather is typically in Oct, with mild temperatures and lower rainfall.
Sunshine
Expect up to 10.1 hours of clear skies in Aug, but only 7.1 hours in Jan. Pack sunglasses and SPF accordingly.
Rainfall
It rains the most in Jul (306mm over 17 days). A reliable rain jacket is a must-have if visiting then.
Day-to-night swings
Temperatures typically drop by 8°C from day to night. Make sure to pack layers for the evenings.
Average temperatures and rainfall
Daily highs and lows in Hiroshima, averaged over 10 years of recorded weather, with the number of days it typically rains.
- 949°133°7Jan
- 1051°134°7Feb
- 1458°440°11Mar
- 1864°847°9Apr
- 2271°1355°10May
- 2578°1864°14Jun
- 2984°2373°17Jul
- 3188°2475°13Aug
- 2983°2170°12Sep
- 2272°1356°7Oct
- 1763°846°6Nov
- 1151°236°4Dec
Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Dec is typically driest at 4 days (31mm); Jul the wettest at 17 days (306mm).
| Month | Average high | Average low | Rainy days | Total rainfall |
|---|---|---|---|---|
| Jan | 9°C | 1°C | 7 | 60mm |
| Feb | 10°C | 1°C | 7 | 79mm |
| Mar | 14°C | 4°C | 11 | 137mm |
| Apr | 18°C | 8°C | 9 | 162mm |
| May | 22°C | 13°C | 10 | 165mm |
| Jun | 25°C | 18°C | 14 | 221mm |
| Jul | 29°C | 23°C | 17 | 306mm |
| Aug | 31°C | 24°C | 13 | 253mm |
| Sep | 29°C | 21°C | 12 | 161mm |
| Oct | 22°C | 13°C | 7 | 61mm |
| Nov | 17°C | 8°C | 6 | 89mm |
| Dec | 11°C | 2°C | 4 | 31mm |
Weather data by Open-Meteo.com
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