Average annual temperature is 16.7 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -3.8 °C
Number of sunny days: 104 days
Number of rainy days: 254 days
Number of snow days: 7 days
Look at detailed online map of Onyū
* Weather data for Onyū 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) | 16.6 | 15.7 | 22.0 | 25.1 | 30.3 | 31.9 | 35.5 | 36.9 | 34.8 | 25.8 | 26.1 | 20.8 |
| Average daytime temperature (°C) | 7.8 | 8.3 | 14.4 | 17.7 | 21.7 | 25.7 | 31.1 | 33.2 | 30.0 | 21.4 | 17.3 | 12.2 |
| Average temperature (°C) | 5.0 | 5.8 | 11.0 | 14.0 | 18.0 | 22.3 | 27.5 | 29.3 | 26.3 | 18.2 | 13.7 | 8.8 |
| Average night temperature (°C) | 2.8 | 3.3 | 7.6 | 11.1 | 14.9 | 19.1 | 24.5 | 26.4 | 23.5 | 15.3 | 10.7 | 5.9 |
| Absolute minimum temperature (°C) | -3.8 | -0.7 | 1.7 | 6.6 | 8.3 | 13.9 | 20.4 | 24.5 | 18.0 | 10.3 | 5.5 | 0.1 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.4 | 5.0 | 7.9 | 7.9 | 8.6 | 7.2 | 9.4 | 10.1 | 9.1 | 8.4 | 7.3 | 6.4 |
| Precipitation (mm) | 233 | 130 | 139 | 222 | 289 | 272 | 169 | 138 | 147 | 118 | 186 | 140 |
| Sunny days | 3 | 4 | 15 | 11 | 12 | 8 | 11 | 8 | 6 | 10 | 9 | 7 |
| Rainy days | 25 | 21 | 16 | 19 | 19 | 22 | 20 | 23 | 24 | 21 | 21 | 23 |
| Snow days | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Onyū during the most sunny months:
The largest precipitation sum in Onyū is at