Average annual temperature is 11.6 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -10.7 °C
Number of sunny days: 73 days
Number of rainy days: 246 days
Number of snow days: 46 days
Look at detailed online map of Iritazawa
* Weather data for Iritazawa 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) | 9.3 | 8.0 | 17.3 | 23.4 | 28.3 | 26.6 | 31.8 | 35.1 | 34.3 | 23.3 | 22.6 | 14.4 |
| Average daytime temperature (°C) | 1.2 | 2.0 | 9.7 | 15.0 | 18.8 | 22.8 | 27.6 | 31.7 | 26.5 | 17.0 | 12.3 | 6.1 |
| Average temperature (°C) | -1.3 | -0.7 | 4.5 | 9.4 | 13.6 | 18.6 | 23.2 | 26.1 | 21.9 | 12.5 | 7.8 | 2.4 |
| Average night temperature (°C) | -3.5 | -3.3 | 0.6 | 5.3 | 9.3 | 15.2 | 19.7 | 22.0 | 18.8 | 9.1 | 4.5 | -0.4 |
| Absolute minimum temperature (°C) | -10.7 | -7.1 | -5.2 | -1.4 | 1.3 | 9.6 | 15.2 | 20.1 | 11.9 | 5.7 | -3.3 | -10.0 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.7 | 5.4 | 8.0 | 8.2 | 8.4 | 7.7 | 9.5 | 11.6 | 7.7 | 8.1 | 5.5 | 4.1 |
| Precipitation (mm) | 205 | 175 | 88 | 96 | 149 | 225 | 149 | 76 | 177 | 124 | 203 | 202 |
| Sunny days | 2 | 5 | 14 | 13 | 13 | 4 | 1 | 3 | 7 | 6 | 5 | 0 |
| Rainy days | 9 | 11 | 12 | 17 | 18 | 26 | 30 | 28 | 23 | 25 | 24 | 23 |
| Snow days | 20 | 12 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 8 |
The best time to visit Iritazawa during the most sunny months:
The largest precipitation sum in Iritazawa is at