Average annual temperature is 11.6 °C
Absolute maximum temperature: 30.1 °C
Absolute minimum temperature: -5.8 °C
Number of sunny days: 125 days
Number of rainy days: 237 days
Number of snow days: 3 days
Look at detailed online map of Sy
* Weather data for Sy France is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.9 | 12.6 | 16.1 | 18.8 | 24.6 | 28.9 | 30.1 | 29.0 | 29.5 | 24.2 | 14.7 | 11.6 |
| Average daytime temperature (°C) | 6.5 | 8.0 | 10.6 | 12.3 | 18.4 | 25.3 | 22.7 | 22.1 | 23.1 | 16.6 | 9.5 | 7.5 |
| Average temperature (°C) | 4.4 | 4.4 | 7.0 | 8.4 | 13.9 | 20.4 | 18.6 | 18.1 | 18.3 | 12.8 | 7.0 | 5.7 |
| Average night temperature (°C) | 1.9 | 1.3 | 3.1 | 4.2 | 9.4 | 14.7 | 14.2 | 14.0 | 13.6 | 9.0 | 4.6 | 3.7 |
| Absolute minimum temperature (°C) | -5.2 | -5.8 | -3.1 | -1.7 | 4.9 | 9.4 | 10.3 | 9.3 | 6.8 | 2.9 | -3.7 | -4.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.7 | 10.1 | 11.9 | 13.8 | 15.4 | 16.2 | 15.8 | 14.4 | 12.6 | 10.8 | 9.1 | 8.2 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 2.5 | 5.1 | 5.9 | 7.4 | 11.6 | 13.4 | 10.4 | 9.6 | 9.5 | 5.9 | 2.9 | 1.9 |
| Precipitation (mm) | 146 | 16 | 168 | 103 | 48 | 44 | 129 | 157 | 66 | 131 | 171 | 120 |
| Sunny days | 8 | 16 | 5 | 8 | 15 | 20 | 7 | 8 | 18 | 12 | 3 | 5 |
| Rainy days | 20 | 12 | 26 | 22 | 16 | 10 | 24 | 23 | 12 | 19 | 27 | 26 |
| Snow days | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sy during the most sunny months:
Months with the longest average daylight duration in Sy:
The largest precipitation sum in Sy is at