Average annual temperature is 11.4 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -12.6 °C
Number of sunny days: 82 days
Number of rainy days: 223 days
Number of snow days: 60 days
Look at detailed online map of Isoya
* Weather data for Isoya 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) | 10.0 | 8.6 | 20.7 | 21.9 | 24.9 | 28.6 | 32.8 | 35.8 | 29.7 | 22.3 | 21.3 | 13.0 |
| Average daytime temperature (°C) | -0.3 | 1.0 | 8.8 | 13.3 | 18.0 | 23.2 | 26.9 | 30.6 | 25.5 | 17.4 | 10.9 | 3.0 |
| Average temperature (°C) | -2.7 | -1.2 | 4.7 | 9.2 | 13.3 | 19.2 | 23.3 | 26.5 | 21.7 | 13.7 | 7.5 | 0.4 |
| Average night temperature (°C) | -4.8 | -3.4 | 1.5 | 6.3 | 10.0 | 16.1 | 20.5 | 23.8 | 18.9 | 11.0 | 4.7 | -1.9 |
| Absolute minimum temperature (°C) | -12.6 | -9.8 | -4.9 | 0.2 | 3.9 | 11.5 | 15.4 | 20.2 | 12.3 | 4.3 | -3.6 | -7.6 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| 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) | 6.4 | 6.5 | 9.0 | 9.4 | 9.8 | 8.8 | 10.2 | 10.2 | 7.5 | 8.2 | 5.9 | 5.2 |
| Precipitation (mm) | 98 | 84 | 74 | 141 | 110 | 192 | 169 | 115 | 144 | 123 | 162 | 113 |
| Sunny days | 2 | 2 | 15 | 7 | 16 | 8 | 5 | 4 | 7 | 10 | 5 | 1 |
| Rainy days | 9 | 8 | 12 | 23 | 15 | 22 | 26 | 27 | 23 | 21 | 20 | 17 |
| Snow days | 20 | 18 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 13 |
The best time to visit Isoya during the most sunny months:
The largest precipitation sum in Isoya is at