Average annual temperature is 10.7 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -15.7 °C
Number of sunny days: 72 days
Number of rainy days: 238 days
Number of snow days: 55 days
Look at detailed online map of Karuizawa
* Weather data for Karuizawa 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) | 8.0 | 8.4 | 20.2 | 21.1 | 26.4 | 28.2 | 31.4 | 35.7 | 31.6 | 21.8 | 23.0 | 13.2 |
| Average daytime temperature (°C) | 0.0 | 1.2 | 10.9 | 14.2 | 18.6 | 23.5 | 26.8 | 31.9 | 26.2 | 17.4 | 11.0 | 3.5 |
| Average temperature (°C) | -3.6 | -2.1 | 4.3 | 8.8 | 12.9 | 18.8 | 22.8 | 26.4 | 21.0 | 11.9 | 7.0 | -0.5 |
| Average night temperature (°C) | -7.5 | -5.5 | -1.1 | 4.5 | 8.0 | 14.9 | 19.5 | 22.2 | 17.4 | 7.6 | 3.7 | -4.2 |
| Absolute minimum temperature (°C) | -15.7 | -12.9 | -12.2 | -1.7 | 0.6 | 8.3 | 14.2 | 19.9 | 8.8 | 2.7 | -5.9 | -13.6 |
| 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 | 15.0 | 14.0 | 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 | 9.4 |
| 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) | 5.2 | 5.8 | 8.4 | 8.7 | 9.4 | 8.2 | 8.9 | 11.3 | 7.9 | 8.4 | 5.2 | 4.5 |
| Precipitation (mm) | 72 | 88 | 99 | 143 | 161 | 188 | 288 | 69 | 218 | 175 | 257 | 108 |
| Sunny days | 2 | 1 | 12 | 10 | 8 | 8 | 4 | 4 | 5 | 11 | 5 | 2 |
| Rainy days | 9 | 11 | 18 | 20 | 23 | 22 | 27 | 27 | 25 | 20 | 22 | 14 |
| Snow days | 20 | 16 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 15 |
The best time to visit Karuizawa during the most sunny months:
The largest precipitation sum in Karuizawa is at