Average annual temperature is 11.6 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -11.0 °C
Number of sunny days: 88 days
Number of rainy days: 232 days
Number of snow days: 45 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) | 8.7 | 10.0 | 21.6 | 22.4 | 27.1 | 29.2 | 33.7 | 36.9 | 30.9 | 22.6 | 21.6 | 13.7 |
| Average daytime temperature (°C) | 0.6 | 1.9 | 10.6 | 14.7 | 19.3 | 24.3 | 27.9 | 32.3 | 26.2 | 17.9 | 11.4 | 3.5 |
| Average temperature (°C) | -1.9 | -0.4 | 4.6 | 9.5 | 13.6 | 19.3 | 23.6 | 27.3 | 21.6 | 13.0 | 7.7 | 0.5 |
| Average night temperature (°C) | -4.3 | -2.8 | -0.7 | 5.3 | 8.4 | 15.4 | 19.9 | 23.3 | 17.9 | 8.9 | 4.6 | -2.4 |
| Absolute minimum temperature (°C) | -11.0 | -8.9 | -7.5 | -0.9 | 0.5 | 9.9 | 15.8 | 20.3 | 10.4 | 3.5 | -2.4 | -9.5 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.7 | 11.9 | 13.3 | 14.5 | 15.0 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 4.9 | 5.5 | 8.2 | 8.4 | 9.7 | 8.1 | 9.8 | 11.6 | 7.7 | 7.7 | 4.9 | 3.3 |
| Precipitation (mm) | 112 | 85 | 103 | 127 | 132 | 149 | 234 | 86 | 142 | 201 | 215 | 110 |
| Sunny days | 1 | 2 | 18 | 9 | 13 | 8 | 5 | 5 | 8 | 10 | 6 | 3 |
| Rainy days | 11 | 12 | 13 | 21 | 18 | 22 | 26 | 26 | 22 | 21 | 21 | 19 |
| Snow days | 19 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 9 |
The best time to visit Ōsawa during the most sunny months:
The largest precipitation sum in Ōsawa is at