Average annual temperature is 9.4 °C
Absolute maximum temperature: 32.2 °C
Absolute minimum temperature: -17.9 °C
Number of sunny days: 101 days
Number of rainy days: 206 days
Number of snow days: 58 days
Look at detailed online map of Nishiōnuma
* Weather data for Nishiōnuma 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) | 7.6 | 7.4 | 16.2 | 18.6 | 25.2 | 26.4 | 30.0 | 32.2 | 27.0 | 22.0 | 19.9 | 12.0 |
| Average daytime temperature (°C) | -2.7 | -0.8 | 7.6 | 12.1 | 17.4 | 22.0 | 26.1 | 28.3 | 23.3 | 16.2 | 9.1 | 1.1 |
| Average temperature (°C) | -6.1 | -3.9 | 3.0 | 7.8 | 12.4 | 17.8 | 22.4 | 24.9 | 19.8 | 11.3 | 5.2 | -2.3 |
| Average night temperature (°C) | -9.5 | -7.5 | -0.8 | 4.4 | 8.4 | 14.6 | 19.3 | 22.4 | 16.7 | 7.6 | 1.5 | -5.7 |
| Absolute minimum temperature (°C) | -17.9 | -14.0 | -9.7 | -0.8 | 1.5 | 9.3 | 14.2 | 19.0 | 10.2 | 0.6 | -8.3 | -13.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 13.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.6 | 6.8 | 8.6 | 8.5 | 9.4 | 8.9 | 9.2 | 8.6 | 6.6 | 8.2 | 6.2 | 5.1 |
| Precipitation (mm) | 66 | 59 | 53 | 122 | 53 | 122 | 88 | 98 | 135 | 96 | 115 | 63 |
| Sunny days | 10 | 5 | 16 | 7 | 10 | 8 | 7 | 0 | 7 | 12 | 8 | 11 |
| Rainy days | 3 | 3 | 11 | 22 | 21 | 22 | 24 | 31 | 23 | 19 | 19 | 8 |
| Snow days | 18 | 20 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 12 |
The largest precipitation sum in Nishiōnuma is at