Average annual temperature is 12.5 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: -6.9 °C
Number of sunny days: 166 days
Number of rainy days: 194 days
Number of snow days: 5 days
Look at detailed online map of Grand-Lancy
* Weather data for Grand-Lancy Switzerland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 14.0 | 14.5 | 19.7 | 21.1 | 23.3 | 30.2 | 37.8 | 38.2 | 31.4 | 27.1 | 15.7 | 12.6 |
| Average daytime temperature (°C) | 5.8 | 8.8 | 12.1 | 13.5 | 18.6 | 26.1 | 28.6 | 28.7 | 25.2 | 19.2 | 9.7 | 7.9 |
| Average temperature (°C) | 2.7 | 4.0 | 7.5 | 9.1 | 14.4 | 20.9 | 22.3 | 23.0 | 19.8 | 14.4 | 6.6 | 4.1 |
| Average night temperature (°C) | -0.4 | -0.2 | 3.1 | 4.7 | 10.2 | 15.5 | 16.2 | 17.4 | 14.7 | 9.9 | 2.6 | 1.1 |
| Absolute minimum temperature (°C) | -6.9 | -4.5 | -3.3 | -1.8 | 5.6 | 11.9 | 11.1 | 9.2 | 6.7 | 3.1 | -3.8 | -4.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.1 | 10.3 | 11.9 | 13.6 | 15.0 | 15.7 | 15.4 | 14.1 | 12.6 | 10.9 | 9.5 | 8.7 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 4.6 | 8.4 | 7.5 | 8.8 | 11.4 | 13.0 | 12.6 | 10.9 | 10.3 | 7.8 | 4.1 | 3.9 |
| Precipitation (mm) | 83 | 7 | 124 | 91 | 49 | 91 | 90 | 54 | 90 | 177 | 151 | 174 |
| Sunny days | 14 | 19 | 12 | 10 | 9 | 17 | 11 | 16 | 22 | 17 | 6 | 13 |
| Rainy days | 13 | 8 | 19 | 20 | 22 | 13 | 20 | 15 | 8 | 14 | 24 | 18 |
| Snow days | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grand-Lancy during the most sunny months:
Months with the longest average daylight duration in Grand-Lancy:
The largest precipitation sum in Grand-Lancy is at