Average annual temperature is 12.4 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -10.9 °C
Number of sunny days: 84 days
Number of rainy days: 247 days
Number of snow days: 34 days
Look at detailed online map of Ōsawa
* Weather data for Ōsawa 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) | 11.1 | 9.0 | 21.2 | 24.3 | 28.9 | 29.4 | 32.9 | 36.5 | 35.7 | 23.1 | 24.5 | 15.1 |
| Average daytime temperature (°C) | 1.9 | 2.6 | 12.6 | 15.9 | 20.4 | 25.0 | 28.5 | 33.3 | 28.0 | 18.6 | 12.9 | 5.7 |
| Average temperature (°C) | -1.3 | -0.7 | 5.6 | 10.1 | 14.6 | 20.2 | 24.1 | 28.2 | 23.1 | 13.5 | 8.6 | 2.3 |
| Average night temperature (°C) | -4.5 | -4.0 | -0.1 | 5.1 | 9.4 | 16.2 | 20.4 | 24.1 | 19.9 | 9.6 | 5.2 | -0.9 |
| Absolute minimum temperature (°C) | -10.9 | -8.5 | -6.1 | -1.9 | 0.7 | 10.6 | 16.2 | 20.0 | 11.1 | 3.7 | -3.9 | -6.4 |
| 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 | 10.0 | 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) | 4.7 | 5.4 | 8.2 | 8.2 | 8.7 | 8.1 | 9.1 | 11.6 | 7.5 | 7.6 | 5.0 | 3.2 |
| Precipitation (mm) | 141 | 99 | 86 | 129 | 150 | 191 | 254 | 75 | 242 | 178 | 273 | 186 |
| Sunny days | 0 | 4 | 18 | 12 | 11 | 6 | 7 | 6 | 5 | 6 | 5 | 4 |
| Rainy days | 17 | 12 | 12 | 18 | 20 | 24 | 24 | 25 | 25 | 25 | 24 | 21 |
| Snow days | 14 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 |
The best time to visit Ōsawa during the most sunny months:
The largest precipitation sum in Ōsawa is at