Average annual temperature is 8.6 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -13.4 °C
Number of sunny days: 124 days
Number of rainy days: 176 days
Number of snow days: 65 days
Look at detailed online map of Koshikawa
* Weather data for Koshikawa Japan is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 5.5 | 6.2 | 12.0 | 18.7 | 25.2 | 26.7 | 30.6 | 32.7 | 30.4 | 23.1 | 18.6 | 10.4 |
| Average daytime temperature (°C) | -4.3 | -3.4 | 5.3 | 10.2 | 16.1 | 20.6 | 23.9 | 26.7 | 23.3 | 15.8 | 9.3 | 0.6 |
| Average temperature (°C) | -6.7 | -6.0 | 1.8 | 6.3 | 11.1 | 16.7 | 20.7 | 23.4 | 19.9 | 12.1 | 5.7 | -2.9 |
| Average night temperature (°C) | -9.2 | -8.8 | -1.6 | 3.4 | 7.7 | 13.7 | 17.9 | 20.9 | 16.9 | 9.0 | 2.1 | -5.8 |
| Absolute minimum temperature (°C) | -13.4 | -12.6 | -7.2 | -2.8 | 0.4 | 7.0 | 12.3 | 13.9 | 10.9 | 3.6 | -5.9 | -13.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 5.8 | 6.9 | 7.8 | 7.3 | 10.1 | 9.3 | 9.1 | 9.0 | 8.3 | 7.4 | 5.7 | 5.5 |
| Precipitation (mm) | 75 | 58 | 94 | 147 | 38 | 107 | 112 | 98 | 144 | 171 | 142 | 76 |
| Sunny days | 5 | 9 | 16 | 6 | 16 | 12 | 11 | 11 | 8 | 11 | 10 | 9 |
| Rainy days | 3 | 0 | 12 | 22 | 15 | 18 | 20 | 20 | 22 | 20 | 17 | 7 |
| Snow days | 23 | 19 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 15 |
The best time to visit Koshikawa during the most sunny months:
Months with the longest average daylight duration in Koshikawa:
The largest precipitation sum in Koshikawa is at