Average annual temperature is 13.5 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: -11 °C
Number of sunny days: 115
Number of rainy days: 229
Number of snow days: 21
Average annual precipitation: 1678 mm
Look at detailed online map of Kōshū
* Weather data for Kōshū Japan is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 14.2 | 13.4 | 21.2 | 24.5 | 28.7 | 29.1 | 33.2 | 30.9 | 30.1 | 24.3 | 22.7 | 18.4 |
| Average daytime temperature (°C) | 6.7 | 7.9 | 13.7 | 17.7 | 20.2 | 23.8 | 28.8 | 28.8 | 26.8 | 19 | 15.3 | 10.2 |
| Average temperature (°C) | 1.9 | 2.9 | 8.6 | 12.3 | 15.3 | 19.8 | 24.3 | 24.4 | 22.4 | 13.9 | 10.1 | 5.2 |
| Average night temperature (°C) | -1.3 | -1.2 | 4.6 | 8.1 | 11.4 | 16.6 | 20.5 | 20.9 | 19.3 | 10.2 | 6.5 | 1.6 |
| Absolute minimum temperature (°C) | -11 | -8.6 | -2.9 | 1.7 | 4.1 | 12.4 | 16.5 | 18.9 | 12.9 | 4.1 | 1 | -6.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.4 | 11.4 | 12.5 | 13.6 | 14.4 | 14.6 | 14.5 | 14 | 12.9 | 11.8 | 10.7 | 9.9 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12 | 13.1 | 14.1 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.8 | 10.5 | 11.4 | 12.6 | 13.6 | 14.4 | 14 | 13 | 11.9 | 10.8 | 9.9 | 9.7 |
| Sunshine mean duration (h) | 7.7 | 8 | 8.5 | 9.3 | 9.1 | 8.2 | 10.1 | 11 | 9.4 | 8.7 | 7.9 | 7.8 |
| Precipitation (mm) | 46 | 76 | 165 | 112 | 260 | 371 | 72 | 168 | 166 | 131 | 70 | 42 |
| Sunny days | 14 | 14 | 9 | 9 | 9 | 2 | 5 | 1 | 5 | 11 | 17 | 19 |
| Rainy days | 4 | 9 | 22 | 21 | 22 | 28 | 26 | 30 | 25 | 20 | 13 | 9 |
| Snow days | 13 | 5 | 3 |
The largest precipitation sum in Kōshū is at