Average annual temperature is 16.6 °C
Absolute maximum temperature: 35.3 °C
Absolute minimum temperature: -6.7 °C
Number of sunny days: 148 days
Number of rainy days: 216 days
Number of snow days: 1 day
Look at detailed online map of Kōyamadaira
* Weather data for Kōyamadaira 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) | 15.4 | 16.2 | 24.3 | 25.7 | 30.4 | 31.3 | 35.3 | 34.1 | 32.8 | 30.3 | 25.4 | 20.9 |
| Average daytime temperature (°C) | 9.9 | 11.2 | 16.2 | 19.5 | 22.2 | 26.1 | 31.3 | 32.2 | 30.0 | 22.6 | 18.6 | 13.7 |
| Average temperature (°C) | 5.3 | 7.0 | 11.7 | 15.2 | 18.0 | 22.4 | 26.9 | 27.5 | 25.6 | 17.5 | 13.5 | 8.4 |
| Average night temperature (°C) | 1.3 | 3.0 | 7.4 | 11.3 | 13.9 | 19.0 | 23.1 | 24.0 | 22.1 | 13.1 | 9.6 | 4.1 |
| Absolute minimum temperature (°C) | -6.7 | -1.8 | 1.2 | 4.5 | 8.3 | 14.5 | 18.9 | 21.5 | 16.4 | 9.3 | 4.4 | -3.2 |
| 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 | 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) | 7.0 | 6.9 | 7.8 | 8.5 | 8.3 | 7.0 | 9.7 | 10.7 | 9.5 | 8.7 | 7.5 | 7.4 |
| Precipitation (mm) | 42 | 97 | 204 | 189 | 259 | 453 | 72 | 215 | 175 | 142 | 83 | 73 |
| Sunny days | 14 | 14 | 14 | 11 | 12 | 5 | 14 | 5 | 9 | 13 | 16 | 21 |
| Rainy days | 16 | 14 | 17 | 19 | 19 | 25 | 17 | 26 | 21 | 18 | 14 | 10 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Kōyamadaira during the most sunny months:
The largest precipitation sum in Kōyamadaira is at