Average annual temperature is 16.6 °C
Absolute maximum temperature: 40.4 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 171 days
Number of rainy days: 191 days
Number of snow days: 3 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) | 14.1 | 18.2 | 24.8 | 29.0 | 32.5 | 32.1 | 40.4 | 39.4 | 35.4 | 26.9 | 27.2 | 19.6 |
| Average daytime temperature (°C) | 9.4 | 11.5 | 18.0 | 21.7 | 24.0 | 27.1 | 34.1 | 34.1 | 30.7 | 23.0 | 18.1 | 12.9 |
| Average temperature (°C) | 3.9 | 5.8 | 12.1 | 15.4 | 18.2 | 22.6 | 28.4 | 28.8 | 26.0 | 17.6 | 12.4 | 7.2 |
| Average night temperature (°C) | -0.4 | 1.1 | 6.9 | 10.2 | 13.4 | 18.8 | 23.9 | 25.0 | 22.8 | 13.1 | 7.8 | 2.7 |
| Absolute minimum temperature (°C) | -4.9 | -4.7 | 1.7 | 3.3 | 7.2 | 11.5 | 21.0 | 23.3 | 16.3 | 7.8 | 2.7 | -3.0 |
| 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) | 7.4 | 8.0 | 7.9 | 8.7 | 9.1 | 7.7 | 9.9 | 10.7 | 8.6 | 8.4 | 7.4 | 7.7 |
| Precipitation (mm) | 18 | 34 | 106 | 59 | 177 | 315 | 75 | 153 | 209 | 98 | 54 | 20 |
| Sunny days | 20 | 19 | 16 | 15 | 14 | 5 | 11 | 5 | 6 | 18 | 20 | 22 |
| Rainy days | 9 | 8 | 15 | 15 | 17 | 25 | 20 | 26 | 24 | 13 | 10 | 9 |
| Snow days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Koya during the most sunny months:
The largest precipitation sum in Koya is at