Average annual temperature is 15.7 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: -3.5 °C
Number of sunny days: 115 days
Number of rainy days: 245 days
Number of snow days: 5 days
Look at detailed online map of Onyu
* Weather data for Onyu 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) | 15.3 | 14.5 | 20.5 | 24.8 | 30.6 | 31.1 | 34.4 | 37.2 | 34.8 | 25.6 | 25.3 | 19.2 |
| Average daytime temperature (°C) | 7.1 | 7.7 | 14.1 | 16.8 | 21.3 | 25.2 | 30.4 | 33.6 | 29.7 | 20.9 | 16.4 | 10.8 |
| Average temperature (°C) | 4.0 | 4.7 | 9.5 | 12.8 | 17.1 | 21.5 | 26.4 | 29.4 | 25.7 | 16.8 | 12.5 | 7.4 |
| Average night temperature (°C) | 1.4 | 1.9 | 5.3 | 9.1 | 13.3 | 18.1 | 23.0 | 26.1 | 22.6 | 13.1 | 9.1 | 4.1 |
| Absolute minimum temperature (°C) | -3.5 | -3.4 | -1.0 | 3.0 | 5.3 | 12.9 | 17.9 | 24.0 | 16.9 | 8.1 | 1.0 | -1.5 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.1 | 5.5 | 8.0 | 8.0 | 8.7 | 7.7 | 9.2 | 10.3 | 8.2 | 8.1 | 6.4 | 4.6 |
| Precipitation (mm) | 176 | 106 | 140 | 221 | 228 | 315 | 169 | 80 | 160 | 151 | 191 | 227 |
| Sunny days | 3 | 8 | 15 | 14 | 15 | 8 | 12 | 11 | 6 | 11 | 7 | 5 |
| Rainy days | 25 | 18 | 16 | 16 | 16 | 22 | 19 | 20 | 24 | 20 | 23 | 26 |
| Snow days | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Onyu during the most sunny months:
The largest precipitation sum in Onyu is at