Kōshū Climate by Month
Kōshū, Yamanashi, Japan
Warm summers and cold winters, with rain spread through the year.
The climate in Kōshū is one of warm summers and cold winters, with rain spread through the year. Afternoon highs range from 45°F (7°C) in January to 83°F (28°C) in August, and January nights average 26°F (-3°C). It gets 51 in (1293 mm) of rain a year, spread across the months.
- Warmest month
- 83°F(28°C)
- Average high, August
- Coldest nights
- 26°F(-3°C)
- Average low, January
- Rain per year
- 51 in(1293 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: May
Best and worst months in Kōshū
Best for weatherThe most comfortable weather comes in May, June and September, with highs around 73°F (23°C) and about 5.7 in (145 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 45°F (7°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 June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Kōshū weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 45°F(7°C) | 26°F(-3°C) | 1.5 in(39 mm) | 58% | 2.6 |
| FebFebruary | 46°F(8°C) | 27°F(-3°C) | 1.9 in(47 mm) | 54% | 3.2 |
| MarMarch | 53°F(11°C) | 32°F(0°C) | 3.1 in(80 mm) | 55% | 3.9 |
| AprApril | 61°F(16°C) | 40°F(4°C) | 3.7 in(95 mm) | 64% | 4.8 |
| MayMayBest | 70°F(21°C) | 49°F(9°C) | 4.3 in(109 mm) | 64% | 5.2 |
| JunJuneBest | 74°F(23°C) | 57°F(14°C) | 5.7 in(146 mm) | 76% | 4.7 |
| JulJuly | 80°F(27°C) | 64°F(18°C) | 5.9 in(150 mm) | 78% | 5.0 |
| AugAugust | 83°F(28°C) | 66°F(19°C) | 6.9 in(174 mm) | 76% | 5.2 |
| SepSeptemberBest | 75°F(24°C) | 60°F(15°C) | 7.1 in(180 mm) | 79% | 3.9 |
| OctOctober | 65°F(19°C) | 49°F(9°C) | 7.0 in(179 mm) | 76% | 3.0 |
| NovNovember | 57°F(14°C) | 37°F(3°C) | 2.3 in(58 mm) | 72% | 2.4 |
| DecDecember | 49°F(9°C) | 28°F(-2°C) | 1.4 in(36 mm) | 63% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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