Average annual temperature is 12.5 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: -10.3 °C
Number of sunny days: 69 days
Number of rainy days: 256 days
Number of snow days: 40 days
Look at detailed online map of Isekizawa
* Weather data for Isekizawa 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) | 11.3 | 9.0 | 20.6 | 20.8 | 24.4 | 27.2 | 31.1 | 35.5 | 32.4 | 22.6 | 22.5 | 13.4 |
| Average daytime temperature (°C) | 1.6 | 2.2 | 10.8 | 14.0 | 18.5 | 23.1 | 26.5 | 32.6 | 26.8 | 17.8 | 11.9 | 5.2 |
| Average temperature (°C) | -0.9 | -0.2 | 6.4 | 10.0 | 14.4 | 19.7 | 23.5 | 28.3 | 22.8 | 13.9 | 8.9 | 2.5 |
| Average night temperature (°C) | -3.4 | -2.7 | 2.6 | 6.7 | 10.9 | 16.8 | 21.0 | 25.2 | 19.9 | 10.9 | 6.2 | 0.1 |
| Absolute minimum temperature (°C) | -10.3 | -8.0 | -5.0 | 0.3 | 3.5 | 10.6 | 16.0 | 22.2 | 11.5 | 5.5 | -1.8 | -5.7 |
| 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) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 5.2 | 6.0 | 8.2 | 8.6 | 8.9 | 7.9 | 8.6 | 11.9 | 7.7 | 7.6 | 5.0 | 3.9 |
| Precipitation (mm) | 111 | 101 | 117 | 184 | 235 | 295 | 517 | 97 | 274 | 262 | 332 | 153 |
| Sunny days | 0 | 2 | 14 | 10 | 10 | 5 | 4 | 7 | 5 | 6 | 4 | 2 |
| Rainy days | 14 | 13 | 17 | 20 | 21 | 25 | 27 | 24 | 25 | 25 | 25 | 20 |
| Snow days | 17 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 9 |
The best time to visit Isekizawa during the most sunny months:
The largest precipitation sum in Isekizawa is at