Onomichi Climate by Month
Onomichi, Hiroshima, Japan
Hot summers and cool winters, with rain spread through the year.
Hot summers and cool winters, with rain spread through the year: that's Onomichi's climate in short. Expect highs of 90°F (32°C) in August and 49°F (9°C) in January, with the coldest nights (January) near 33°F (1°C). About 51 in (1308 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 90°F(32°C)
- Average high, August
- Coldest nights
- 33°F(1°C)
- Average low, January
- Rain per year
- 51 in(1308 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: August
Best and worst months in Onomichi
Best for weatherThe most comfortable weather comes in May and October, with highs around 74°F (23°C) and about 5.0 in (126 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 49°F (9°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Onomichi weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 49°F(9°C) | 33°F(1°C) | 1.7 in(42 mm) | 69% | 2.4 |
| FebFebruary | 50°F(10°C) | 34°F(1°C) | 2.0 in(51 mm) | 66% | 3.0 |
| MarMarch | 56°F(14°C) | 39°F(4°C) | 3.4 in(86 mm) | 71% | 3.9 |
| AprApril | 66°F(19°C) | 48°F(9°C) | 4.5 in(114 mm) | 63% | 4.8 |
| MayMayBest | 74°F(24°C) | 57°F(14°C) | 5.0 in(126 mm) | 69% | 5.2 |
| JunJune | 80°F(27°C) | 66°F(19°C) | 7.4 in(189 mm) | 76% | 4.7 |
| JulJuly | 87°F(31°C) | 74°F(23°C) | 7.9 in(200 mm) | 76% | 5.1 |
| AugAugust | 90°F(32°C) | 76°F(24°C) | 3.7 in(95 mm) | 73% | 5.3 |
| SepSeptember | 83°F(28°C) | 68°F(20°C) | 6.8 in(172 mm) | 73% | 4.2 |
| OctOctoberBest | 73°F(23°C) | 57°F(14°C) | 5.0 in(126 mm) | 71% | 3.4 |
| NovNovember | 63°F(17°C) | 46°F(8°C) | 2.4 in(61 mm) | 70% | 2.6 |
| DecDecember | 53°F(12°C) | 36°F(2°C) | 1.8 in(46 mm) | 70% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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