Average annual temperature is 11.2 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -16.1 °C
Number of sunny days: 98 days
Number of rainy days: 213 days
Number of snow days: 54 days
Look at detailed online map of On’yama
* Weather data for On’yama 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) | 9.7 | 9.0 | 19.3 | 22.4 | 28.2 | 29.1 | 33.2 | 34.4 | 33.3 | 24.0 | 21.8 | 12.9 |
| Average daytime temperature (°C) | 0.3 | 1.3 | 11.2 | 15.0 | 19.0 | 23.7 | 28.2 | 31.3 | 25.8 | 17.6 | 11.2 | 3.7 |
| Average temperature (°C) | -3.2 | -2.1 | 5.1 | 9.4 | 13.5 | 19.1 | 23.6 | 26.5 | 21.4 | 12.7 | 7.3 | 0.2 |
| Average night temperature (°C) | -6.7 | -5.4 | 0.6 | 5.3 | 9.2 | 15.7 | 20.0 | 23.3 | 18.1 | 9.2 | 4.1 | -3.1 |
| Absolute minimum temperature (°C) | -16.1 | -12.8 | -9.7 | -0.4 | 1.1 | 9.4 | 14.2 | 20.1 | 10.0 | 4.1 | -6.8 | -13.2 |
| 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 | 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 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 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) | 5.5 | 6.2 | 8.6 | 8.9 | 8.9 | 8.6 | 9.8 | 10.8 | 7.8 | 8.2 | 5.6 | 4.9 |
| Precipitation (mm) | 65 | 57 | 78 | 102 | 116 | 141 | 152 | 88 | 179 | 97 | 127 | 97 |
| Sunny days | 5 | 5 | 20 | 11 | 9 | 9 | 5 | 8 | 2 | 11 | 6 | 7 |
| Rainy days | 6 | 5 | 9 | 19 | 22 | 21 | 26 | 23 | 28 | 20 | 22 | 12 |
| Snow days | 20 | 18 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 12 |
The best time to visit On’yama during the most sunny months:
The largest precipitation sum in On’yama is at