Average annual temperature is 13.3 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -15.4 °C
Number of sunny days: 175 days
Number of rainy days: 186 days
Number of snow days: 4 days
Look at detailed online map of Grasselli
* Weather data for Grasselli United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.7 | 18.7 | 15.9 | 30.6 | 30.1 | 29.6 | 34.5 | 31.6 | 35.8 | 27.5 | 20.3 | 17.3 |
| Average daytime temperature (°C) | 9.0 | 8.6 | 10.6 | 18.3 | 21.3 | 25.7 | 30.1 | 27.9 | 25.1 | 20.0 | 11.8 | 9.5 |
| Average temperature (°C) | 5.1 | 3.8 | 5.6 | 12.9 | 15.9 | 20.2 | 24.9 | 23.2 | 20.3 | 14.8 | 6.9 | 5.4 |
| Average night temperature (°C) | 1.9 | -0.3 | 1.3 | 8.5 | 10.7 | 15.8 | 20.6 | 19.2 | 16.5 | 10.8 | 2.7 | 1.8 |
| Absolute minimum temperature (°C) | -3.4 | -15.4 | -3.1 | 1.2 | 5.3 | 10.7 | 16.8 | 15.9 | 10.1 | 5.8 | -3.9 | -4.9 |
| 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) | 9.6 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.8 | 12.5 | 11.1 | 9.9 | 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) | 4.6 | 6.7 | 7.4 | 8.7 | 11.9 | 10.1 | 11.6 | 10.4 | 7.8 | 7.7 | 7.5 | 5.1 |
| Precipitation (mm) | 119 | 53 | 111 | 131 | 37 | 112 | 149 | 95 | 224 | 107 | 56 | 218 |
| Sunny days | 14 | 17 | 13 | 13 | 19 | 12 | 8 | 13 | 13 | 17 | 18 | 18 |
| Rainy days | 17 | 8 | 17 | 17 | 12 | 18 | 23 | 18 | 17 | 14 | 12 | 13 |
| Snow days | 0 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grasselli during the most sunny months:
The largest precipitation sum in Grasselli is at