Average annual temperature is 9.7 °C
Absolute maximum temperature: 30.4 °C
Absolute minimum temperature: -14.0 °C
Number of sunny days: 109 days
Number of rainy days: 215 days
Number of snow days: 41 days
Look at detailed online map of Kojohama
* Weather data for Kojohama 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) | 9.1 | 7.8 | 12.1 | 15.5 | 21.2 | 25.4 | 30.4 | 30.2 | 27.5 | 22.1 | 19.1 | 11.5 |
| Average daytime temperature (°C) | -1.1 | 0.2 | 7.1 | 11.6 | 15.8 | 19.3 | 24.7 | 26.9 | 23.4 | 16.5 | 9.7 | 2.0 |
| Average temperature (°C) | -4.6 | -3.1 | 2.9 | 7.9 | 11.9 | 16.4 | 21.9 | 24.6 | 20.3 | 12.5 | 6.2 | -0.9 |
| Average night temperature (°C) | -7.7 | -7.2 | -0.6 | 4.7 | 8.2 | 14.0 | 19.6 | 22.7 | 17.7 | 9.2 | 3.0 | -3.6 |
| Absolute minimum temperature (°C) | -13.8 | -14.0 | -6.9 | -1.2 | 3.0 | 7.8 | 15.6 | 20.2 | 10.2 | 3.6 | -4.4 | -10.1 |
| 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) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.0 | 7.5 | 8.8 | 8.6 | 9.6 | 8.7 | 9.6 | 8.5 | 6.7 | 8.2 | 6.6 | 5.8 |
| Precipitation (mm) | 50 | 57 | 80 | 119 | 81 | 230 | 141 | 231 | 311 | 93 | 172 | 55 |
| Sunny days | 14 | 7 | 16 | 11 | 8 | 8 | 6 | 1 | 4 | 8 | 9 | 17 |
| Rainy days | 5 | 3 | 13 | 19 | 23 | 22 | 25 | 30 | 26 | 23 | 19 | 7 |
| Snow days | 12 | 18 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 7 |
The largest precipitation sum in Kojohama is at