Average annual temperature is 13.2 °C
Absolute maximum temperature: 33.4 °C
Absolute minimum temperature: -9.5 °C
Number of sunny days: 145 days
Number of rainy days: 210 days
Number of snow days: 10 days
Look at detailed online map of Ōshiozawa
* Weather data for Ōshiozawa 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) | 12.8 | 15.5 | 21.1 | 27.2 | 29.5 | 28.7 | 33.4 | 32.8 | 31.0 | 22.5 | 23.2 | 17.4 |
| Average daytime temperature (°C) | 6.7 | 7.8 | 14.2 | 18.6 | 20.8 | 23.7 | 29.4 | 29.8 | 26.6 | 19.2 | 14.8 | 10.1 |
| Average temperature (°C) | 1.0 | 2.1 | 8.3 | 12.0 | 15.4 | 19.6 | 24.5 | 25.0 | 22.5 | 13.9 | 9.3 | 4.3 |
| Average night temperature (°C) | -2.8 | -2.1 | 3.3 | 6.4 | 10.7 | 16.2 | 20.2 | 21.7 | 19.7 | 9.5 | 5.1 | 0.2 |
| Absolute minimum temperature (°C) | -9.5 | -5.4 | -3.1 | 0.8 | 4.1 | 11.7 | 16.5 | 17.8 | 12.5 | 5.9 | -3.3 | -5.5 |
| 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) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.6 | 8.1 | 8.5 | 9.3 | 9.2 | 7.9 | 9.8 | 10.0 | 8.8 | 9.0 | 8.0 | 7.8 |
| Precipitation (mm) | 19 | 44 | 98 | 83 | 182 | 352 | 106 | 164 | 208 | 83 | 64 | 22 |
| Sunny days | 19 | 17 | 12 | 14 | 14 | 3 | 8 | 0 | 3 | 13 | 21 | 21 |
| Rainy days | 6 | 7 | 19 | 16 | 17 | 27 | 23 | 31 | 27 | 18 | 9 | 10 |
| Snow days | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ōshiozawa is at