Average annual temperature is 16.2 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: -7.7 °C
Number of sunny days: 173 days
Number of rainy days: 190 days
Number of snow days: 2 days
Look at detailed online map of Koya
* Weather data for Koya 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) | 16.1 | 15.0 | 23.7 | 23.7 | 25.7 | 30.2 | 37.4 | 37.7 | 35.3 | 25.7 | 27.9 | 20.4 |
| Average daytime temperature (°C) | 8.9 | 9.6 | 15.8 | 18.7 | 22.5 | 25.6 | 31.8 | 33.5 | 31.3 | 22.4 | 17.3 | 12.1 |
| Average temperature (°C) | 4.2 | 5.2 | 10.7 | 14.1 | 18.1 | 22.1 | 27.4 | 28.9 | 26.6 | 17.1 | 12.2 | 7.1 |
| Average night temperature (°C) | 0.1 | 1.2 | 6.1 | 9.7 | 14.5 | 19.0 | 23.8 | 25.5 | 22.9 | 12.6 | 8.2 | 3.0 |
| Absolute minimum temperature (°C) | -7.7 | -3.0 | -0.7 | 3.9 | 8.1 | 12.3 | 19.7 | 23.6 | 18.7 | 7.5 | 1.2 | -3.3 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.1 | 6.3 | 8.4 | 7.9 | 9.2 | 6.7 | 10.0 | 10.1 | 9.7 | 8.7 | 7.4 | 7.1 |
| Precipitation (mm) | 41 | 47 | 105 | 179 | 283 | 324 | 86 | 188 | 67 | 36 | 121 | 31 |
| Sunny days | 13 | 14 | 18 | 16 | 17 | 10 | 14 | 5 | 12 | 18 | 16 | 20 |
| Rainy days | 16 | 14 | 13 | 14 | 14 | 20 | 17 | 26 | 18 | 13 | 14 | 11 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koya is at