Average annual temperature is 12.8 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: -8.8 °C
Number of sunny days: 87 days
Number of rainy days: 239 days
Number of snow days: 39 days
Look at detailed online map of Iwao
* Weather data for Iwao 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) | 11.1 | 9.7 | 19.0 | 23.9 | 29.7 | 27.8 | 33.7 | 35.6 | 34.5 | 24.0 | 22.1 | 13.4 |
| Average daytime temperature (°C) | 2.4 | 3.4 | 11.8 | 16.2 | 20.1 | 24.1 | 28.6 | 32.7 | 27.3 | 18.0 | 12.6 | 6.9 |
| Average temperature (°C) | -0.5 | 0.4 | 6.7 | 10.8 | 15.0 | 19.9 | 24.3 | 27.3 | 23.0 | 13.6 | 8.8 | 3.3 |
| Average night temperature (°C) | -3.0 | -2.5 | 2.3 | 6.6 | 10.8 | 16.5 | 20.9 | 23.5 | 20.1 | 10.2 | 5.7 | 0.6 |
| Absolute minimum temperature (°C) | -8.8 | -7.7 | -4.1 | 0.5 | 3.1 | 12.1 | 16.6 | 21.8 | 12.3 | 5.5 | -1.8 | -5.2 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 4.6 | 5.7 | 8.1 | 8.2 | 8.8 | 7.7 | 9.8 | 11.7 | 7.8 | 8.3 | 5.9 | 4.4 |
| Precipitation (mm) | 131 | 120 | 89 | 78 | 136 | 215 | 128 | 56 | 158 | 90 | 196 | 168 |
| Sunny days | 2 | 6 | 13 | 15 | 14 | 3 | 2 | 7 | 5 | 8 | 9 | 3 |
| Rainy days | 10 | 12 | 15 | 15 | 17 | 27 | 29 | 24 | 25 | 23 | 21 | 21 |
| Snow days | 19 | 10 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
The best time to visit Iwao during the most sunny months:
The largest precipitation sum in Iwao is at