Average annual temperature is 15.3 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: -5.3 °C
Number of sunny days: 96 days
Number of rainy days: 260 days
Number of snow days: 9 days
Look at detailed online map of Nii
* Weather data for Nii 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) | 15.1 | 15.4 | 21.8 | 24.5 | 28.9 | 31.3 | 34.9 | 37.2 | 32.5 | 25.7 | 25.2 | 19.4 |
| Average daytime temperature (°C) | 6.7 | 7.7 | 14.2 | 16.7 | 21.5 | 25.6 | 30.6 | 33.0 | 28.6 | 20.4 | 15.9 | 10.5 |
| Average temperature (°C) | 3.3 | 4.3 | 9.4 | 12.5 | 16.8 | 21.2 | 26.1 | 28.4 | 24.7 | 16.8 | 12.0 | 7.1 |
| Average night temperature (°C) | 0.5 | 1.2 | 5.4 | 8.8 | 12.8 | 17.8 | 22.7 | 25.0 | 22.0 | 13.8 | 9.0 | 4.5 |
| Absolute minimum temperature (°C) | -5.3 | -4.2 | -2.1 | 2.2 | 5.6 | 12.5 | 19.2 | 23.0 | 18.1 | 9.2 | 3.5 | -2.9 |
| 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) | 5.5 | 5.4 | 8.2 | 8.0 | 8.9 | 7.7 | 9.2 | 10.4 | 8.8 | 8.4 | 7.1 | 5.9 |
| Precipitation (mm) | 171 | 73 | 129 | 275 | 277 | 240 | 183 | 143 | 153 | 75 | 173 | 170 |
| Sunny days | 3 | 8 | 15 | 14 | 15 | 7 | 5 | 3 | 4 | 9 | 8 | 5 |
| Rainy days | 24 | 16 | 16 | 16 | 16 | 23 | 26 | 28 | 26 | 22 | 22 | 25 |
| Snow days | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Nii during the most sunny months:
The largest precipitation sum in Nii is at