Average annual temperature is 8.2 °C
Absolute maximum temperature: 30.8 °C
Absolute minimum temperature: -20.9 °C
Number of sunny days: 96 days
Number of rainy days: 209 days
Number of snow days: 60 days
Look at detailed online map of Iwashimizu
* Weather data for Iwashimizu 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) | 8.0 | 6.3 | 14.8 | 17.8 | 21.9 | 25.3 | 28.2 | 30.8 | 27.1 | 20.9 | 16.9 | 9.8 |
| Average daytime temperature (°C) | -3.0 | -1.5 | 7.0 | 11.0 | 15.9 | 20.9 | 24.4 | 27.5 | 23.0 | 15.1 | 8.3 | 0.6 |
| Average temperature (°C) | -8.2 | -6.0 | 2.1 | 6.7 | 11.2 | 16.7 | 20.7 | 24.0 | 19.0 | 10.5 | 4.4 | -3.0 |
| Average night temperature (°C) | -13.1 | -11.1 | -2.2 | 2.9 | 7.0 | 13.2 | 17.7 | 21.4 | 15.8 | 6.5 | 1.1 | -6.2 |
| Absolute minimum temperature (°C) | -20.9 | -18.6 | -10.6 | -3.3 | 0.2 | 6.2 | 13.6 | 17.9 | 6.9 | 0.6 | -8.1 | -11.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.0 | 7.4 | 8.4 | 8.2 | 9.6 | 9.5 | 9.8 | 9.4 | 7.6 | 8.1 | 6.1 | 5.8 |
| Precipitation (mm) | 33 | 49 | 113 | 199 | 85 | 122 | 96 | 198 | 277 | 153 | 190 | 52 |
| Sunny days | 12 | 6 | 15 | 6 | 9 | 6 | 9 | 2 | 6 | 8 | 7 | 10 |
| Rainy days | 2 | 2 | 12 | 24 | 22 | 24 | 22 | 29 | 24 | 23 | 18 | 7 |
| Snow days | 17 | 20 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 14 |
The largest precipitation sum in Iwashimizu is at