Average annual temperature is 13.3 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -7.9 °C
Number of sunny days: 118 days
Number of rainy days: 225 days
Number of snow days: 22 days
Look at detailed online map of Kōyōchō
* Weather data for Kōyōchō 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) | 13.2 | 13.2 | 19.7 | 24.2 | 29.2 | 28.0 | 33.9 | 35.0 | 32.9 | 24.5 | 23.2 | 15.5 |
| Average daytime temperature (°C) | 4.8 | 6.0 | 13.3 | 16.8 | 20.2 | 24.2 | 29.3 | 32.1 | 27.6 | 18.9 | 13.9 | 8.9 |
| Average temperature (°C) | 0.8 | 1.7 | 7.2 | 11.1 | 14.9 | 19.9 | 24.9 | 26.9 | 23.4 | 14.3 | 9.1 | 4.6 |
| Average night temperature (°C) | -2.5 | -1.5 | 1.9 | 6.1 | 9.7 | 16.2 | 20.9 | 23.1 | 20.2 | 10.4 | 5.4 | 1.3 |
| Absolute minimum temperature (°C) | -7.9 | -4.9 | -5.2 | -2.3 | 1.6 | 10.3 | 16.1 | 21.1 | 11.2 | 5.0 | 1.0 | -3.9 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 6.6 | 7.6 | 8.1 | 8.8 | 8.8 | 7.5 | 9.8 | 11.1 | 7.8 | 8.8 | 6.7 | 6.2 |
| Precipitation (mm) | 40 | 53 | 103 | 83 | 131 | 263 | 102 | 79 | 239 | 77 | 132 | 60 |
| Sunny days | 9 | 12 | 12 | 16 | 13 | 5 | 7 | 5 | 3 | 11 | 13 | 12 |
| Rainy days | 10 | 10 | 18 | 14 | 18 | 25 | 24 | 26 | 27 | 20 | 17 | 16 |
| Snow days | 12 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Kōyōchō during the most sunny months:
The largest precipitation sum in Kōyōchō is at