Average annual temperature is 10.2 °C
Absolute maximum temperature: 31.6 °C
Absolute minimum temperature: -16.0 °C
Number of sunny days: 132 days
Number of rainy days: 199 days
Number of snow days: 34 days
Look at detailed online map of Iwaimachi
* Weather data for Iwaimachi 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) | 10.4 | 9.8 | 19.5 | 22.4 | 26.1 | 25.2 | 29.6 | 31.6 | 29.1 | 21.4 | 20.9 | 14.6 |
| Average daytime temperature (°C) | 1.6 | 3.2 | 11.6 | 14.4 | 18.4 | 21.9 | 26.8 | 28.6 | 25.3 | 16.0 | 11.7 | 6.2 |
| Average temperature (°C) | -3.3 | -1.7 | 5.2 | 8.5 | 12.8 | 17.3 | 21.9 | 22.9 | 20.4 | 10.5 | 6.3 | 1.1 |
| Average night temperature (°C) | -7.8 | -6.2 | -0.1 | 3.6 | 7.9 | 13.1 | 17.7 | 18.3 | 16.5 | 6.4 | 2.2 | -3.3 |
| Absolute minimum temperature (°C) | -16.0 | -13.5 | -6.4 | -3.8 | 0.3 | 5.3 | 14.8 | 15.8 | 8.9 | 0.1 | -6.8 | -9.4 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.3 | 6.7 | 8.1 | 8.0 | 9.5 | 8.3 | 9.6 | 11.1 | 9.1 | 8.7 | 7.0 | 5.6 |
| Precipitation (mm) | 96 | 93 | 161 | 230 | 260 | 256 | 198 | 73 | 140 | 103 | 150 | 142 |
| Sunny days | 7 | 7 | 16 | 14 | 17 | 10 | 8 | 9 | 7 | 16 | 13 | 8 |
| Rainy days | 8 | 9 | 15 | 16 | 14 | 20 | 23 | 22 | 23 | 15 | 17 | 17 |
| Snow days | 16 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
The best time to visit Iwaimachi during the most sunny months:
The largest precipitation sum in Iwaimachi is at