Average annual temperature is 15.1 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -10.1 °C
Number of sunny days: 150 days
Number of rainy days: 204 days
Number of snow days: 11 days
Look at detailed online map of Kosechō
* Weather data for Kosechō 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) | 15.9 | 15.7 | 22.7 | 26.3 | 30.7 | 31.2 | 34.8 | 35.0 | 32.5 | 26.5 | 25.7 | 19.9 |
| Average daytime temperature (°C) | 8.4 | 9.6 | 16.6 | 19.1 | 23.3 | 26.7 | 30.9 | 31.8 | 29.5 | 21.8 | 16.7 | 11.0 |
| Average temperature (°C) | 3.0 | 4.3 | 10.0 | 13.1 | 17.7 | 21.7 | 26.3 | 27.2 | 24.7 | 15.8 | 11.0 | 5.9 |
| Average night temperature (°C) | -1.0 | 0.3 | 4.6 | 8.1 | 13.2 | 17.7 | 22.3 | 24.0 | 21.2 | 11.0 | 6.5 | 1.8 |
| Absolute minimum temperature (°C) | -10.1 | -3.5 | -2.6 | 1.8 | 6.6 | 12.2 | 17.6 | 21.9 | 17.2 | 5.5 | -0.5 | -2.6 |
| 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 | 14.2 | 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) | 6.5 | 6.4 | 8.2 | 7.7 | 8.5 | 7.2 | 9.0 | 9.3 | 9.0 | 8.8 | 7.5 | 6.8 |
| Precipitation (mm) | 38 | 48 | 79 | 194 | 226 | 220 | 174 | 169 | 87 | 26 | 39 | 52 |
| Sunny days | 13 | 12 | 18 | 15 | 17 | 10 | 7 | 1 | 5 | 20 | 17 | 15 |
| Rainy days | 12 | 14 | 13 | 15 | 14 | 20 | 24 | 30 | 25 | 11 | 13 | 13 |
| Snow days | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Kosechō is at