Average annual temperature is 12.3 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -10.5 °C
Number of sunny days: 91 days
Number of rainy days: 220 days
Number of snow days: 54 days
Look at detailed online map of Ōyasawa
* Weather data for Ōyasawa 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) | 9.6 | 9.1 | 17.1 | 21.0 | 26.5 | 28.6 | 33.3 | 36.9 | 31.8 | 23.2 | 22.7 | 13.7 |
| Average daytime temperature (°C) | 0.5 | 1.6 | 10.0 | 14.2 | 18.6 | 23.7 | 27.5 | 31.7 | 26.3 | 18.1 | 11.8 | 4.1 |
| Average temperature (°C) | -1.4 | -0.3 | 5.5 | 10.1 | 14.2 | 19.7 | 24.2 | 27.9 | 22.6 | 14.4 | 8.6 | 1.7 |
| Average night temperature (°C) | -3.3 | -2.2 | 2.0 | 6.9 | 10.9 | 16.7 | 21.5 | 25.0 | 19.7 | 11.6 | 5.7 | -0.6 |
| Absolute minimum temperature (°C) | -10.5 | -6.5 | -3.1 | -0.5 | 4.0 | 12.3 | 15.6 | 22.7 | 11.8 | 5.1 | -2.3 | -6.3 |
| 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 | 10.6 | 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) | 4.8 | 5.8 | 8.7 | 8.6 | 9.8 | 8.4 | 9.7 | 11.1 | 7.9 | 8.3 | 4.9 | 3.9 |
| Precipitation (mm) | 150 | 130 | 82 | 135 | 135 | 116 | 186 | 53 | 119 | 145 | 216 | 128 |
| Sunny days | 1 | 1 | 18 | 10 | 15 | 9 | 6 | 7 | 7 | 9 | 6 | 2 |
| Rainy days | 8 | 11 | 12 | 20 | 16 | 21 | 25 | 24 | 23 | 22 | 22 | 16 |
| Snow days | 22 | 16 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 13 |
The best time to visit Ōyasawa during the most sunny months:
The largest precipitation sum in Ōyasawa is at