Average annual temperature is 10.6 °C
Absolute maximum temperature: 29.7 °C
Absolute minimum temperature: -13.3 °C
Number of sunny days: 139 days
Number of rainy days: 205 days
Number of snow days: 21 days
Look at detailed online map of Karuizawa Machi
* Weather data for Karuizawa Machi 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) | 11.5 | 12.7 | 18.1 | 22.9 | 26.0 | 26.3 | 29.7 | 28.8 | 29.3 | 21.5 | 19.6 | 16.8 |
| Average daytime temperature (°C) | 3.4 | 4.8 | 11.2 | 15.3 | 17.7 | 21.3 | 26.4 | 26.0 | 24.0 | 16.4 | 11.5 | 7.4 |
| Average temperature (°C) | -2.0 | -0.6 | 5.8 | 9.4 | 12.9 | 17.3 | 22.0 | 22.2 | 19.9 | 11.1 | 6.7 | 1.9 |
| Average night temperature (°C) | -5.5 | -4.4 | 1.6 | 4.5 | 8.7 | 14.1 | 18.1 | 19.4 | 17.2 | 6.9 | 3.0 | -2.0 |
| Absolute minimum temperature (°C) | -13.3 | -9.3 | -5.7 | -1.3 | 2.3 | 8.3 | 15.0 | 17.1 | 10.3 | 1.5 | -5.5 | -7.1 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.6 | 7.7 | 8.7 | 9.3 | 9.3 | 8.3 | 10.1 | 9.9 | 8.9 | 9.0 | 7.9 | 7.5 |
| Precipitation (mm) | 26 | 47 | 107 | 96 | 236 | 300 | 124 | 163 | 215 | 88 | 49 | 43 |
| Sunny days | 14 | 15 | 13 | 15 | 13 | 7 | 5 | 2 | 3 | 15 | 17 | 20 |
| Rainy days | 6 | 6 | 18 | 15 | 18 | 23 | 26 | 29 | 27 | 16 | 12 | 9 |
| Snow days | 11 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The largest precipitation sum in Karuizawa Machi is at