Temperature
Hot by day, warm at night.
Heavier storm-season rain and humid air are the main limitations.
Hot by day, warm at night.
Rain is frequent. About 15 wet days, more than in most months.
Cloudier spells limit sunshine.
Very hot days with very humid air.
In August, afternoons feel about 97° and nights feel near 87°.
Mostly cloudy skies this month.
Calm winds are typical in August.
August late afternoons are around 90°F, easing to about 84°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 50 | 36 | 2.2 | 9 | 7.4 | 70 |
| Feb | 52 | 38 | 2.7 | 10 | 8.2 | 68 |
| Mar | 59 | 43 | 4.4 | 12 | 8.6 | 66 |
| Apr | 69 | 52 | 5.0 | 11 | 9.2 | 65 |
| May | 77 | 61 | 5.8 | 11 | 9.7 | 68 |
| Jun | 82 | 69 | 8.6 | 15 | 8.4 | 75 |
| Jul | 89 | 77 | 9.4 | 17 | 9.5 | 78 |
| Aug | 92 | 78 | 7.1 | 15 | 10.4 | 75 |
| Sep | 85 | 71 | 7.4 | 14 | 8.9 | 75 |
| Oct | 75 | 59 | 4.3 | 9 | 8.4 | 73 |
| Nov | 65 | 49 | 2.9 | 8 | 8.0 | 72 |
| Dec | 54 | 40 | 2.5 | 10 | 7.5 | 72 |
Similar climates
Want a side-by-side climate view? Compare Hiroshima with Suzhou.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology