Average annual temperature is 13.1 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -9.5 °C
Number of sunny days: 111 days
Number of rainy days: 230 days
Number of snow days: 24 days
Look at detailed online map of Nishiiwai Gun
* Weather data for Nishiiwai Gun 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) | 11.8 | 13.6 | 20.3 | 22.3 | 31.2 | 31.7 | 35.9 | 35.0 | 32.9 | 25.2 | 22.7 | 14.8 |
| Average daytime temperature (°C) | 4.2 | 5.1 | 13.3 | 17.1 | 20.8 | 25.0 | 29.7 | 32.3 | 27.8 | 19.6 | 13.7 | 7.2 |
| Average temperature (°C) | 0.5 | 0.5 | 6.9 | 10.8 | 14.8 | 20.3 | 24.8 | 27.8 | 23.3 | 14.2 | 9.0 | 3.4 |
| Average night temperature (°C) | -2.7 | -3.6 | 1.5 | 5.4 | 9.9 | 16.5 | 20.8 | 24.7 | 20.2 | 10.0 | 5.4 | -0.1 |
| Absolute minimum temperature (°C) | -9.1 | -9.5 | -4.2 | -1.2 | 1.4 | 10.6 | 16.8 | 22.3 | 12.7 | 5.6 | -1.2 | -3.7 |
| 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) | 5.7 | 6.9 | 8.3 | 8.8 | 8.4 | 7.8 | 9.2 | 10.5 | 7.2 | 8.6 | 5.8 | 4.6 |
| Precipitation (mm) | 28 | 54 | 98 | 100 | 146 | 178 | 138 | 96 | 158 | 42 | 109 | 83 |
| Sunny days | 8 | 9 | 20 | 16 | 15 | 4 | 3 | 2 | 5 | 14 | 9 | 6 |
| Rainy days | 12 | 10 | 11 | 14 | 16 | 26 | 28 | 29 | 25 | 17 | 20 | 22 |
| Snow days | 11 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The best time to visit Nishiiwai Gun during the most sunny months:
The largest precipitation sum in Nishiiwai Gun is at