Average annual temperature is 16.6 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: -6.0 °C
Number of sunny days: 171 days
Number of rainy days: 192 days
Number of snow days: 2 days
Look at detailed online map of Iwadominami
* Weather data for Iwadominami 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 | 18.1 | 24.6 | 24.5 | 30.3 | 31.6 | 38.8 | 36.7 | 34.8 | 28.0 | 26.3 | 22.0 |
| Average daytime temperature (°C) | 8.9 | 11.0 | 16.9 | 20.2 | 22.5 | 26.4 | 33.3 | 33.1 | 30.1 | 22.6 | 18.2 | 13.4 |
| Average temperature (°C) | 4.1 | 5.9 | 12.1 | 15.3 | 17.9 | 22.5 | 28.1 | 28.5 | 26.0 | 17.7 | 13.0 | 7.9 |
| Average night temperature (°C) | 0.0 | 1.8 | 7.7 | 11.1 | 13.8 | 19.3 | 23.9 | 25.0 | 22.8 | 13.3 | 8.8 | 3.1 |
| Absolute minimum temperature (°C) | -6.0 | -3.2 | 1.0 | 4.1 | 7.6 | 14.4 | 21.0 | 23.3 | 16.8 | 9.3 | 3.6 | -2.3 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.1 | 7.4 | 7.5 | 8.6 | 8.5 | 7.5 | 10.7 | 11.2 | 8.8 | 8.8 | 7.1 | 7.7 |
| Precipitation (mm) | 28 | 39 | 141 | 132 | 163 | 297 | 63 | 134 | 188 | 108 | 59 | 32 |
| Sunny days | 19 | 18 | 13 | 13 | 13 | 9 | 13 | 5 | 10 | 18 | 17 | 23 |
| Rainy days | 11 | 9 | 18 | 17 | 18 | 21 | 18 | 26 | 20 | 13 | 13 | 8 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Iwadominami during the most sunny months:
The largest precipitation sum in Iwadominami is at