Average annual temperature is 12.5 °C
Absolute maximum temperature: 33.9 °C
Absolute minimum temperature: -16.1 °C
Number of sunny days: 132 days
Number of rainy days: 213 days
Number of snow days: 20 days
Look at detailed online map of Iwashita
* Weather data for Iwashita 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) | 13.2 | 14.6 | 18.7 | 22.7 | 29.5 | 28.4 | 33.9 | 33.3 | 31.0 | 23.2 | 22.5 | 17.1 |
| Average daytime temperature (°C) | 5.3 | 6.4 | 13.1 | 16.9 | 20.1 | 23.8 | 29.4 | 29.6 | 26.9 | 18.7 | 13.8 | 9.3 |
| Average temperature (°C) | -0.1 | 1.2 | 7.2 | 10.6 | 14.6 | 19.4 | 24.2 | 25.0 | 22.4 | 13.1 | 8.3 | 3.4 |
| Average night temperature (°C) | -4.0 | -2.4 | 2.4 | 5.2 | 9.5 | 15.6 | 19.9 | 21.5 | 18.9 | 8.7 | 4.0 | -0.4 |
| Absolute minimum temperature (°C) | -16.1 | -7.5 | -4.2 | -1.5 | 1.1 | 7.5 | 16.8 | 18.0 | 11.7 | 3.9 | -2.6 | -5.4 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 7.2 | 7.4 | 8.2 | 9.0 | 8.6 | 7.8 | 9.9 | 10.0 | 8.5 | 8.7 | 7.8 | 7.6 |
| Precipitation (mm) | 33 | 53 | 95 | 77 | 180 | 296 | 151 | 156 | 229 | 78 | 59 | 65 |
| Sunny days | 15 | 11 | 14 | 15 | 14 | 6 | 5 | 1 | 2 | 16 | 16 | 17 |
| Rainy days | 7 | 8 | 17 | 15 | 17 | 24 | 26 | 30 | 28 | 15 | 14 | 12 |
| Snow days | 9 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The largest precipitation sum in Iwashita is at