Average annual temperature is 14.0 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -12.5 °C
Number of sunny days: 131 days
Number of rainy days: 216 days
Number of snow days: 18 days
Look at detailed online map of Nagano
* Weather data for Nagano 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) | 14.9 | 15.6 | 21.7 | 24.3 | 31.3 | 30.7 | 35.1 | 35.8 | 33.6 | 26.3 | 24.8 | 17.7 |
| Average daytime temperature (°C) | 6.4 | 7.7 | 14.4 | 18.5 | 21.0 | 25.1 | 30.3 | 32.7 | 28.3 | 20.9 | 15.7 | 10.2 |
| Average temperature (°C) | 1.6 | 2.4 | 7.8 | 12.3 | 15.5 | 20.8 | 25.5 | 27.9 | 23.9 | 14.7 | 10.1 | 4.8 |
| Average night temperature (°C) | -2.6 | -2.0 | 2.3 | 6.7 | 10.3 | 17.1 | 21.4 | 23.8 | 20.5 | 9.7 | 5.7 | 0.4 |
| Absolute minimum temperature (°C) | -12.5 | -5.6 | -5.4 | -1.4 | 1.3 | 12.5 | 16.8 | 21.3 | 11.9 | 5.7 | -2.4 | -4.2 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| 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) | 6.6 | 7.4 | 8.3 | 9.0 | 8.3 | 7.4 | 9.6 | 11.7 | 7.7 | 8.9 | 6.8 | 6.9 |
| Precipitation (mm) | 37 | 66 | 71 | 50 | 154 | 217 | 105 | 68 | 277 | 67 | 79 | 74 |
| Sunny days | 11 | 11 | 18 | 19 | 11 | 8 | 10 | 4 | 6 | 14 | 11 | 8 |
| Rainy days | 10 | 12 | 13 | 11 | 20 | 22 | 21 | 27 | 24 | 17 | 19 | 20 |
| Snow days | 10 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Nagano during the most sunny months:
The largest precipitation sum in Nagano is at