Average annual temperature is 13.6 °C
Absolute maximum temperature: 36.8 °C
Absolute minimum temperature: -9.6 °C
Number of sunny days: 82 days
Number of rainy days: 259 days
Number of snow days: 24 days
Look at detailed online map of Ōyama
* Weather data for Ōyama 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) | 12.9 | 12.8 | 22.2 | 23.2 | 28.2 | 28.5 | 32.2 | 36.8 | 34.3 | 23.5 | 24.5 | 17.0 |
| Average daytime temperature (°C) | 4.0 | 4.1 | 12.3 | 15.5 | 19.7 | 24.6 | 28.5 | 33.5 | 28.0 | 19.4 | 14.2 | 7.7 |
| Average temperature (°C) | 1.5 | 1.7 | 6.8 | 10.7 | 14.9 | 20.5 | 24.5 | 28.6 | 23.7 | 14.9 | 10.5 | 4.6 |
| Average night temperature (°C) | -1.1 | -1.0 | 2.2 | 6.7 | 10.5 | 17.3 | 20.9 | 24.2 | 20.5 | 11.6 | 7.3 | 1.9 |
| Absolute minimum temperature (°C) | -9.6 | -8.2 | -3.2 | -0.8 | 3.8 | 12.6 | 15.7 | 21.5 | 12.8 | 6.3 | 2.2 | -4.7 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.1 | 5.3 | 8.1 | 8.0 | 8.6 | 8.4 | 9.2 | 11.8 | 7.9 | 8.0 | 5.5 | 3.7 |
| Precipitation (mm) | 188 | 113 | 123 | 143 | 171 | 159 | 286 | 33 | 230 | 209 | 264 | 276 |
| Sunny days | 0 | 3 | 12 | 12 | 10 | 6 | 10 | 12 | 3 | 5 | 6 | 3 |
| Rainy days | 19 | 16 | 19 | 18 | 21 | 24 | 21 | 19 | 27 | 26 | 24 | 25 |
| Snow days | 12 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Ōyama during the most sunny months:
The largest precipitation sum in Ōyama is at