Average annual temperature is 7.4 °C
Absolute maximum temperature: 27.6 °C
Absolute minimum temperature: -15.5 °C
Number of sunny days: 106 days
Number of rainy days: 228 days
Number of snow days: 31 days
Look at detailed online map of Isshinden
* Weather data for Isshinden 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) | 7.0 | 5.8 | 14.7 | 17.7 | 21.3 | 22.6 | 27.6 | 26.9 | 26.3 | 17.4 | 15.8 | 10.3 |
| Average daytime temperature (°C) | -1.8 | -0.7 | 7.3 | 10.1 | 14.4 | 17.9 | 22.9 | 23.0 | 21.1 | 12.4 | 7.4 | 1.9 |
| Average temperature (°C) | -5.1 | -4.1 | 2.8 | 5.5 | 10.0 | 14.2 | 18.6 | 19.1 | 17.1 | 8.2 | 3.8 | -1.5 |
| Average night temperature (°C) | -8.1 | -7.1 | -0.8 | 1.9 | 6.7 | 11.4 | 15.6 | 16.7 | 14.5 | 5.3 | 0.9 | -4.3 |
| Absolute minimum temperature (°C) | -15.5 | -11.8 | -7.8 | -3.9 | 0.7 | 6.6 | 13.6 | 15.3 | 9.8 | -0.5 | -6.5 | -10.9 |
| 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 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.9 | 6.5 | 8.2 | 7.7 | 8.9 | 7.5 | 9.2 | 9.1 | 8.9 | 8.5 | 6.6 | 5.4 |
| Precipitation (mm) | 111 | 118 | 161 | 360 | 312 | 362 | 228 | 326 | 130 | 82 | 188 | 158 |
| Sunny days | 7 | 8 | 16 | 12 | 10 | 9 | 7 | 1 | 5 | 14 | 10 | 7 |
| Rainy days | 7 | 11 | 14 | 18 | 21 | 21 | 24 | 30 | 25 | 17 | 20 | 20 |
| Snow days | 17 | 9 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
The largest precipitation sum in Isshinden is at