Average annual temperature is 8.3 °C
Absolute maximum temperature: 28.8 °C
Absolute minimum temperature: -19.0 °C
Number of sunny days: 164 days
Number of rainy days: 166 days
Number of snow days: 35 days
Look at detailed online map of Koitoi
* Weather data for Koitoi 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) | 5.6 | 5.5 | 10.7 | 14.2 | 20.8 | 23.8 | 28.8 | 27.8 | 26.3 | 21.1 | 17.0 | 10.5 |
| Average daytime temperature (°C) | -2.8 | -1.5 | 5.9 | 10.4 | 14.1 | 17.6 | 22.9 | 24.5 | 22.5 | 15.5 | 9.7 | 1.9 |
| Average temperature (°C) | -7.1 | -5.4 | 1.8 | 6.5 | 10.0 | 14.7 | 19.5 | 22.0 | 19.6 | 12.1 | 6.4 | -1.7 |
| Average night temperature (°C) | -11.5 | -10.1 | -2.5 | 3.1 | 6.9 | 12.3 | 17.1 | 20.1 | 17.0 | 8.9 | 3.2 | -4.8 |
| Absolute minimum temperature (°C) | -19.0 | -17.8 | -12.5 | -4.8 | 1.2 | 7.4 | 12.5 | 14.6 | 11.3 | 3.3 | -4.8 | -9.3 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 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) | 7.4 | 7.7 | 8.6 | 8.5 | 9.9 | 7.7 | 9.3 | 7.8 | 7.6 | 8.0 | 6.6 | 6.5 |
| Precipitation (mm) | 28 | 41 | 98 | 153 | 64 | 78 | 73 | 92 | 191 | 102 | 94 | 45 |
| Sunny days | 18 | 14 | 17 | 11 | 12 | 10 | 18 | 8 | 11 | 17 | 10 | 18 |
| Rainy days | 3 | 0 | 10 | 19 | 19 | 20 | 13 | 23 | 19 | 14 | 19 | 7 |
| Snow days | 10 | 14 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 |
Months with the longest average daylight duration in Koitoi:
The largest precipitation sum in Koitoi is at