Average annual temperature is 13.0 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -8.9 °C
Number of sunny days: 66 days
Number of rainy days: 265 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) | 12.4 | 10.8 | 21.2 | 20.0 | 23.9 | 28.0 | 30.4 | 35.7 | 32.6 | 23.1 | 22.9 | 14.4 |
| Average daytime temperature (°C) | 2.8 | 3.0 | 11.1 | 13.8 | 18.2 | 23.0 | 26.6 | 32.8 | 27.0 | 18.5 | 12.9 | 6.0 |
| Average temperature (°C) | 0.4 | 0.7 | 6.7 | 10.2 | 14.2 | 19.8 | 23.7 | 28.5 | 23.2 | 14.6 | 9.9 | 3.4 |
| Average night temperature (°C) | -2.0 | -2.2 | 3.1 | 7.2 | 10.8 | 17.1 | 21.3 | 25.3 | 20.4 | 11.7 | 7.1 | 1.0 |
| Absolute minimum temperature (°C) | -8.8 | -8.9 | -2.9 | 0.6 | 3.9 | 12.7 | 16.9 | 22.2 | 12.3 | 7.4 | -0.1 | -5.8 |
| 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) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 5.0 | 5.7 | 8.1 | 8.5 | 8.9 | 8.0 | 8.8 | 11.9 | 7.7 | 7.3 | 4.8 | 3.5 |
| Precipitation (mm) | 122 | 83 | 118 | 153 | 201 | 230 | 350 | 86 | 291 | 266 | 291 | 155 |
| Sunny days | 1 | 3 | 14 | 10 | 9 | 4 | 4 | 8 | 3 | 5 | 4 | 1 |
| Rainy days | 16 | 13 | 17 | 20 | 22 | 26 | 27 | 23 | 27 | 26 | 26 | 22 |
| Snow days | 14 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
The best time to visit Ōsawa during the most sunny months:
The largest precipitation sum in Ōsawa is at