Average annual temperature is 12.2 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -10.6 °C
Number of sunny days: 98 days
Number of rainy days: 243 days
Number of snow days: 24 days
Look at detailed online map of Irisawa
* Weather data for Irisawa 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) | 12.7 | 12.0 | 18.9 | 21.5 | 29.9 | 28.5 | 34.0 | 34.2 | 31.0 | 24.1 | 21.7 | 15.0 |
| Average daytime temperature (°C) | 2.7 | 3.6 | 12.1 | 15.9 | 19.5 | 23.4 | 28.0 | 30.4 | 26.4 | 18.5 | 12.4 | 6.6 |
| Average temperature (°C) | -0.7 | -0.2 | 6.1 | 10.1 | 14.3 | 19.1 | 23.7 | 26.0 | 22.1 | 13.6 | 8.3 | 2.9 |
| Average night temperature (°C) | -3.4 | -3.5 | 1.5 | 5.6 | 10.1 | 15.9 | 20.4 | 23.1 | 19.3 | 10.0 | 5.2 | 0.1 |
| Absolute minimum temperature (°C) | -10.2 | -10.6 | -5.5 | -0.7 | 3.6 | 9.9 | 15.7 | 21.2 | 12.0 | 4.7 | -1.4 | -4.4 |
| 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) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 5.9 | 6.8 | 8.4 | 9.0 | 8.5 | 7.7 | 8.8 | 10.9 | 7.2 | 8.7 | 6.1 | 4.6 |
| Precipitation (mm) | 51 | 77 | 89 | 90 | 174 | 176 | 145 | 125 | 268 | 57 | 129 | 123 |
| Sunny days | 6 | 8 | 17 | 15 | 10 | 5 | 7 | 0 | 4 | 10 | 11 | 5 |
| Rainy days | 11 | 13 | 14 | 15 | 21 | 25 | 24 | 31 | 26 | 21 | 19 | 23 |
| Snow days | 14 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Irisawa during the most sunny months:
The largest precipitation sum in Irisawa is at