Average annual temperature is 10.2 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -15.1 °C
Number of sunny days: 66 days
Number of rainy days: 238 days
Number of snow days: 61 days
Look at detailed online map of Kosaka
* Weather data for Kosaka 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) | 7.8 | 7.3 | 19.0 | 19.4 | 24.3 | 27.0 | 30.0 | 34.2 | 30.0 | 21.3 | 21.1 | 11.2 |
| Average daytime temperature (°C) | -0.8 | 0.4 | 9.6 | 13.1 | 17.5 | 22.4 | 25.6 | 30.6 | 25.3 | 16.5 | 10.0 | 2.7 |
| Average temperature (°C) | -4.1 | -2.5 | 4.0 | 8.1 | 12.3 | 18.1 | 22.1 | 25.8 | 20.8 | 11.9 | 6.4 | -0.8 |
| Average night temperature (°C) | -7.4 | -5.5 | -0.4 | 4.3 | 8.3 | 15.0 | 19.3 | 22.5 | 18.0 | 8.3 | 3.4 | -4.0 |
| Absolute minimum temperature (°C) | -15.1 | -11.1 | -8.4 | -2.4 | 0.7 | 10.6 | 13.9 | 20.1 | 11.1 | 2.3 | -8.6 | -12.1 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.3 |
| 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) | 5.4 | 5.1 | 8.1 | 8.4 | 9.3 | 7.9 | 8.3 | 11.0 | 7.6 | 8.3 | 5.3 | 4.3 |
| Precipitation (mm) | 69 | 117 | 87 | 167 | 139 | 186 | 293 | 95 | 186 | 157 | 236 | 102 |
| Sunny days | 2 | 1 | 14 | 8 | 12 | 9 | 3 | 2 | 4 | 7 | 3 | 1 |
| Rainy days | 9 | 8 | 13 | 22 | 19 | 21 | 28 | 29 | 26 | 24 | 24 | 15 |
| Snow days | 20 | 19 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 15 |
The best time to visit Kosaka during the most sunny months:
The largest precipitation sum in Kosaka is at