Average annual temperature is 9.4 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -13.4 °C
Number of sunny days: 75 days
Number of rainy days: 236 days
Number of snow days: 54 days
Look at detailed online map of Iwasaka
* Weather data for Iwasaka 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) | 8.2 | 6.4 | 18.1 | 18.5 | 22.8 | 25.8 | 29.0 | 33.5 | 29.0 | 19.8 | 21.2 | 11.2 |
| Average daytime temperature (°C) | -2.2 | -1.1 | 6.8 | 11.1 | 16.1 | 21.0 | 24.7 | 29.4 | 23.6 | 15.4 | 9.0 | 1.2 |
| Average temperature (°C) | -4.2 | -3.1 | 2.5 | 7.0 | 11.6 | 17.3 | 21.4 | 25.1 | 19.4 | 11.1 | 5.6 | -1.3 |
| Average night temperature (°C) | -6.1 | -4.9 | -1.2 | 4.0 | 8.0 | 14.4 | 18.4 | 21.8 | 16.2 | 7.7 | 2.5 | -4.0 |
| Absolute minimum temperature (°C) | -13.4 | -10.1 | -5.9 | -1.3 | 0.3 | 9.2 | 12.7 | 18.5 | 8.2 | 2.7 | -5.2 | -11.2 |
| 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 | 8.1 | 8.6 | 9.8 | 8.5 | 9.6 | 11.9 | 7.6 | 7.7 | 5.0 | 3.4 |
| Precipitation (mm) | 148 | 120 | 107 | 173 | 143 | 153 | 267 | 173 | 169 | 208 | 220 | 161 |
| Sunny days | 1 | 1 | 14 | 11 | 14 | 7 | 5 | 7 | 6 | 7 | 2 | 0 |
| Rainy days | 7 | 11 | 14 | 19 | 17 | 23 | 26 | 24 | 24 | 24 | 25 | 22 |
| Snow days | 23 | 16 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 9 |
The best time to visit Iwasaka during the most sunny months:
The largest precipitation sum in Iwasaka is at