Hiroshima weather by month
Hiroshima's warmest month is August (average high 32.8°C) and coldest is January (9.9°C). Monthly temperature, rain, sunshine and flower seasons from Japan Meteorological Agency 1991–2020 normals.
| Month | High / low | Rain | In bloom |
|---|---|---|---|
| January | 10° / 2°C (50° / 36°F) | 46 mm (6 days) | — |
| February | 11° / 2°C (52° / 36°F) | 64 mm (7 days) | Plum blossoms |
| March | 15° / 5°C (58° / 41°F) | 118 mm (9 days) | Cherry blossoms |
| April | 20° / 10°C (68° / 50°F) | 141 mm (9 days) | Cherry blossoms |
| May | 24° / 15°C (76° / 59°F) | 170 mm (9 days) | — |
| June | 27° / 20°C (81° / 68°F) | 227 mm (11 days) | — |
| July | 31° / 24°C (88° / 75°F) | 280 mm (11 days) | — |
| August | 33° / 25°C (91° / 77°F) | 131 mm (8 days) | — |
| September | 29° / 21°C (84° / 70°F) | 163 mm (9 days) | — |
| October | 24° / 15°C (75° / 59°F) | 109 mm (6 days) | — |
| November | 18° / 9°C (64° / 48°F) | 69 mm (6 days) | Autumn colors |
| December | 12° / 4°C (54° / 39°F) | 54 mm (6 days) | Autumn colors |
See Hiroshima cherry blossom dates and autumn leaves.
Source: Japan Meteorological Agency climate normals 1991–2020 (processed by Japan Bloom Calendar). Averages, not a forecast.