Average annual temperature is 17.0 °C
Absolute maximum temperature: 35.3 °C
Absolute minimum temperature: -5.3 °C
Number of sunny days: 145 days
Number of rainy days: 219 days
Number of snow days: 1 day
Look at detailed online map of Kōshi
* Weather data for Kōshi 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) | 19.8 | 19.0 | 24.1 | 27.0 | 29.6 | 30.4 | 34.7 | 35.3 | 34.5 | 28.2 | 28.0 | 21.4 |
| Average daytime temperature (°C) | 10.2 | 13.0 | 17.9 | 20.9 | 24.5 | 26.9 | 30.9 | 32.7 | 30.6 | 23.0 | 18.3 | 12.6 |
| Average temperature (°C) | 5.5 | 7.8 | 12.3 | 15.6 | 19.6 | 22.9 | 26.9 | 28.2 | 25.8 | 17.4 | 12.9 | 8.0 |
| Average night temperature (°C) | 1.7 | 3.2 | 7.2 | 10.9 | 15.0 | 19.5 | 23.8 | 24.8 | 22.1 | 12.7 | 8.6 | 4.0 |
| Absolute minimum temperature (°C) | -5.3 | -3.0 | -2.4 | 3.5 | 7.2 | 12.9 | 22.3 | 22.5 | 18.9 | 6.5 | 1.7 | -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) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.3 | 14.1 | 13.3 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 10.0 | 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 | 6.7 | 8.0 | 7.7 | 8.8 | 6.3 | 8.6 | 10.4 | 9.6 | 9.0 | 8.0 | 6.1 |
| Precipitation (mm) | 92 | 100 | 142 | 228 | 305 | 484 | 294 | 207 | 116 | 47 | 79 | 95 |
| Sunny days | 16 | 14 | 16 | 17 | 15 | 5 | 4 | 3 | 4 | 19 | 19 | 13 |
| Rainy days | 15 | 14 | 15 | 13 | 16 | 25 | 27 | 28 | 26 | 12 | 11 | 17 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Kōshi during the most sunny months:
The largest precipitation sum in Kōshi is at