Average annual temperature is 13.1 °C
Absolute maximum temperature: 34.7 °C
Absolute minimum temperature: -9.4 °C
Number of sunny days: 121 days
Number of rainy days: 227 days
Number of snow days: 17 days
Look at detailed online map of Iwakura
* Weather data for Iwakura 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) | 13.1 | 13.8 | 18.1 | 21.3 | 28.6 | 28.3 | 34.7 | 33.3 | 30.7 | 25.8 | 23.0 | 15.7 |
| Average daytime temperature (°C) | 4.4 | 5.4 | 12.2 | 16.1 | 18.9 | 23.0 | 28.4 | 29.7 | 26.3 | 19.8 | 14.4 | 8.0 |
| Average temperature (°C) | 0.7 | 1.0 | 7.0 | 11.1 | 14.6 | 19.7 | 24.4 | 26.7 | 22.9 | 14.8 | 9.7 | 3.8 |
| Average night temperature (°C) | -2.1 | -2.5 | 2.4 | 6.8 | 11.1 | 17.0 | 21.0 | 24.2 | 20.1 | 10.8 | 6.0 | 0.6 |
| Absolute minimum temperature (°C) | -9.4 | -7.8 | -2.8 | 0.8 | 4.9 | 11.5 | 16.7 | 21.7 | 12.0 | 5.7 | -1.1 | -3.2 |
| 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) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 6.5 | 7.6 | 8.7 | 9.1 | 8.7 | 8.1 | 9.8 | 11.4 | 7.7 | 8.7 | 6.8 | 6.3 |
| Precipitation (mm) | 28 | 49 | 146 | 96 | 124 | 169 | 145 | 129 | 223 | 87 | 86 | 69 |
| Sunny days | 14 | 13 | 20 | 18 | 11 | 6 | 5 | 1 | 3 | 10 | 10 | 10 |
| Rainy days | 9 | 11 | 11 | 12 | 20 | 24 | 26 | 30 | 27 | 21 | 18 | 18 |
| Snow days | 8 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
The best time to visit Iwakura during the most sunny months:
The largest precipitation sum in Iwakura is at