Average annual temperature is 13.7 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -8.1 °C
Number of sunny days: 129 days
Number of rainy days: 223 days
Number of snow days: 13 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) | 12.8 | 14.8 | 20.3 | 21.0 | 29.8 | 29.0 | 34.9 | 34.3 | 31.5 | 25.3 | 22.7 | 15.4 |
| Average daytime temperature (°C) | 5.2 | 6.3 | 13.3 | 16.9 | 20.0 | 24.7 | 29.3 | 31.1 | 27.4 | 20.2 | 14.6 | 8.5 |
| Average temperature (°C) | 0.8 | 1.4 | 7.6 | 11.6 | 15.2 | 20.5 | 25.0 | 27.7 | 23.8 | 15.2 | 10.1 | 4.1 |
| Average night temperature (°C) | -2.5 | -2.2 | 2.8 | 7.0 | 10.9 | 17.3 | 21.7 | 25.2 | 21.2 | 11.5 | 6.5 | 0.6 |
| Absolute minimum temperature (°C) | -8.1 | -6.6 | -3.5 | 0.9 | 2.7 | 12.7 | 17.1 | 22.9 | 14.8 | 6.5 | 0.0 | -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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 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) | 6.8 | 7.5 | 8.7 | 9.1 | 8.5 | 7.8 | 10.0 | 11.6 | 7.8 | 8.6 | 7.1 | 6.7 |
| Precipitation (mm) | 24 | 56 | 100 | 84 | 123 | 187 | 132 | 62 | 242 | 50 | 76 | 69 |
| Sunny days | 11 | 14 | 16 | 17 | 12 | 4 | 5 | 7 | 5 | 14 | 11 | 13 |
| Rainy days | 12 | 10 | 15 | 13 | 19 | 26 | 26 | 24 | 25 | 17 | 19 | 17 |
| Snow days | 8 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Kōyōchō during the most sunny months:
The largest precipitation sum in Kōyōchō is at