Average annual temperature is 9.8 °C
Absolute maximum temperature: 30.9 °C
Absolute minimum temperature: -13.9 °C
Number of sunny days: 90 days
Number of rainy days: 230 days
Number of snow days: 45 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) | 11.2 | 9.2 | 15.8 | 23.9 | 27.0 | 25.5 | 30.9 | 30.1 | 29.6 | 21.7 | 21.9 | 15.1 |
| Average daytime temperature (°C) | 0.6 | 1.5 | 8.9 | 14.9 | 18.2 | 21.6 | 26.9 | 28.4 | 24.8 | 16.0 | 11.4 | 6.1 |
| Average temperature (°C) | -3.4 | -2.5 | 3.2 | 7.8 | 12.2 | 17.1 | 21.7 | 23.3 | 20.3 | 10.6 | 5.9 | 1.2 |
| Average night temperature (°C) | -6.9 | -5.9 | -1.6 | 2.2 | 6.9 | 13.3 | 17.0 | 19.4 | 16.9 | 6.4 | 1.7 | -2.3 |
| Absolute minimum temperature (°C) | -13.8 | -13.9 | -11.2 | -4.1 | -2.4 | 3.9 | 11.0 | 15.6 | 8.7 | 0.0 | -6.8 | -13.3 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 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) | 4.2 | 5.6 | 8.0 | 8.7 | 8.7 | 7.9 | 10.0 | 11.8 | 8.5 | 7.9 | 5.5 | 5.2 |
| Precipitation (mm) | 132 | 112 | 87 | 88 | 126 | 232 | 112 | 51 | 141 | 104 | 148 | 109 |
| Sunny days | 5 | 8 | 11 | 12 | 11 | 7 | 3 | 6 | 3 | 10 | 10 | 4 |
| Rainy days | 6 | 9 | 16 | 17 | 20 | 23 | 28 | 25 | 27 | 21 | 20 | 18 |
| Snow days | 20 | 11 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 |
The best time to visit Iwashita during the most sunny months:
The largest precipitation sum in Iwashita is at