Average annual temperature is 13.1 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -14.7 °C
Number of sunny days: 151 days
Number of rainy days: 186 days
Number of snow days: 28 days
Look at detailed online map of Koiwadake
* Weather data for Koiwadake 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) | 13.5 | 14.3 | 21.8 | 26.6 | 30.2 | 29.1 | 33.7 | 34.6 | 34.9 | 23.3 | 23.9 | 18.4 |
| Average daytime temperature (°C) | 5.4 | 7.0 | 13.9 | 17.6 | 21.3 | 24.9 | 30.1 | 32.4 | 29.2 | 18.9 | 15.2 | 9.5 |
| Average temperature (°C) | -0.2 | 1.7 | 7.4 | 11.0 | 15.2 | 19.9 | 24.8 | 26.6 | 23.4 | 13.1 | 9.3 | 4.2 |
| Average night temperature (°C) | -5.0 | -2.5 | 2.4 | 5.7 | 10.0 | 16.0 | 20.6 | 21.8 | 19.2 | 8.6 | 4.7 | 0.3 |
| Absolute minimum temperature (°C) | -14.7 | -6.5 | -4.7 | -4.7 | 1.5 | 9.7 | 17.2 | 20.2 | 12.2 | 3.4 | -4.5 | -5.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.0 | 7.1 | 8.7 | 8.8 | 9.3 | 8.1 | 9.8 | 11.3 | 9.3 | 8.7 | 7.6 | 6.6 |
| Precipitation (mm) | 62 | 87 | 108 | 137 | 203 | 207 | 101 | 49 | 104 | 68 | 104 | 71 |
| Sunny days | 11 | 10 | 19 | 17 | 19 | 9 | 6 | 6 | 7 | 19 | 16 | 12 |
| Rainy days | 6 | 12 | 12 | 13 | 12 | 21 | 25 | 25 | 23 | 12 | 12 | 13 |
| Snow days | 14 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 |
The best time to visit Koiwadake during the most sunny months:
The largest precipitation sum in Koiwadake is at