Average annual temperature is 11.5 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -12.4 °C
Number of sunny days: 84 days
Number of rainy days: 237 days
Number of snow days: 44 days
Look at detailed online map of Iwaka
* Weather data for Iwaka 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) | 8.6 | 9.4 | 21.6 | 22.1 | 26.5 | 30.1 | 33.6 | 36.5 | 31.3 | 22.9 | 21.6 | 13.4 |
| Average daytime temperature (°C) | 0.5 | 1.9 | 11.3 | 15.0 | 19.5 | 24.6 | 28.0 | 32.3 | 26.3 | 18.1 | 11.6 | 3.6 |
| Average temperature (°C) | -2.5 | -0.9 | 4.8 | 9.7 | 13.7 | 19.5 | 23.7 | 27.4 | 21.6 | 12.7 | 7.6 | 0.1 |
| Average night temperature (°C) | -5.4 | -3.7 | -0.7 | 5.3 | 8.4 | 15.5 | 19.9 | 23.2 | 17.6 | 8.4 | 4.1 | -3.4 |
| Absolute minimum temperature (°C) | -12.4 | -9.2 | -7.2 | -2.0 | 0.3 | 10.3 | 15.2 | 20.2 | 9.2 | 2.8 | -6.3 | -11.9 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 4.9 | 5.6 | 8.2 | 8.4 | 9.7 | 8.3 | 9.9 | 11.6 | 7.8 | 7.9 | 4.9 | 3.6 |
| Precipitation (mm) | 110 | 97 | 105 | 135 | 117 | 116 | 192 | 80 | 123 | 140 | 205 | 103 |
| Sunny days | 1 | 1 | 17 | 8 | 11 | 8 | 5 | 5 | 8 | 13 | 5 | 2 |
| Rainy days | 13 | 14 | 13 | 22 | 20 | 22 | 26 | 26 | 22 | 18 | 23 | 18 |
| Snow days | 17 | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 11 |
The best time to visit Iwaka during the most sunny months:
The largest precipitation sum in Iwaka is at