Kumamoto Climate by Month
Kumamoto, Japan
Hot summers and cool winters, with rain spread through the year.
Kumamoto has hot summers and cool winters, with rain spread through the year. Afternoon highs range from 51°F (11°C) in January to 90°F (32°C) in August, and January nights average 35°F (2°C). About 78 in (1990 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 90°F(32°C)
- Average high, August
- Coldest nights
- 35°F(2°C)
- Average low, January
- Rain per year
- 78 in(1990 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: August
Best and worst months in Kumamoto
Best for weatherThe most comfortable weather comes in October, with highs around 76°F (24°C) and about 3.6 in (91 mm) of rain a month.
Least pleasantJuly is the least pleasant month: it's the wettest, with 17 in (422 mm) of rain.
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 October.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Kumamoto weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 51°F(11°C) | 35°F(2°C) | 2.3 in(58 mm) | 64% | 2.3 |
| FebFebruary | 54°F(12°C) | 37°F(3°C) | 3.2 in(81 mm) | 68% | 3.0 |
| MarMarch | 60°F(16°C) | 42°F(6°C) | 4.7 in(119 mm) | 70% | 3.9 |
| AprApril | 69°F(21°C) | 51°F(10°C) | 5.5 in(140 mm) | 68% | 4.6 |
| MayMay | 78°F(25°C) | 59°F(15°C) | 6.8 in(173 mm) | 68% | 5.0 |
| JunJune | 82°F(28°C) | 67°F(20°C) | 16 in(412 mm) | 76% | 4.3 |
| JulJuly | 88°F(31°C) | 74°F(24°C) | 17 in(422 mm) | 77% | 4.8 |
| AugAugust | 90°F(32°C) | 75°F(24°C) | 6.9 in(175 mm) | 73% | 5.0 |
| SepSeptember | 85°F(29°C) | 69°F(20°C) | 6.7 in(169 mm) | 73% | 4.2 |
| OctOctoberBest | 76°F(24°C) | 58°F(15°C) | 3.6 in(91 mm) | 71% | 3.5 |
| NovNovember | 65°F(19°C) | 48°F(9°C) | 3.3 in(85 mm) | 71% | 2.6 |
| DecDecember | 55°F(13°C) | 38°F(3°C) | 2.6 in(65 mm) | 75% | 2.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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