Average annual temperature is 14.4 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: -3.7 °C
Number of sunny days: 156 days
Number of rainy days: 206 days
Number of snow days: 3 days
Look at detailed online map of Sion
* Weather data for Sion 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) | 19.1 | 18.6 | 27.0 | 28.0 | 28.3 | 31.1 | 34.3 | 38.9 | 33.1 | 31.1 | 23.0 | 16.4 |
| Average daytime temperature (°C) | 9.3 | 11.7 | 16.1 | 17.9 | 21.1 | 26.0 | 26.8 | 28.2 | 27.2 | 22.9 | 14.4 | 11.5 |
| Average temperature (°C) | 5.6 | 5.7 | 11.0 | 12.6 | 15.8 | 20.6 | 21.5 | 22.2 | 21.1 | 17.4 | 10.7 | 7.8 |
| Average night temperature (°C) | 2.4 | 0.8 | 6.4 | 7.8 | 10.8 | 16.1 | 16.4 | 16.7 | 16.0 | 13.0 | 7.4 | 4.6 |
| Absolute minimum temperature (°C) | -3.6 | -3.1 | -3.7 | 1.3 | 6.2 | 13.1 | 12.5 | 10.7 | 11.2 | 8.7 | -0.2 | -2.0 |
| 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 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 4.5 | 7.4 | 7.1 | 7.9 | 10.1 | 10.2 | 11.1 | 10.9 | 10.1 | 7.6 | 4.8 | 4.2 |
| Precipitation (mm) | 119 | 38 | 67 | 114 | 129 | 117 | 19 | 34 | 65 | 95 | 161 | 88 |
| Sunny days | 13 | 22 | 14 | 13 | 7 | 6 | 13 | 16 | 18 | 15 | 6 | 13 |
| Rainy days | 16 | 5 | 17 | 17 | 24 | 24 | 18 | 15 | 12 | 16 | 24 | 18 |
| Snow days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sion during the most sunny months:
Months with the longest average daylight duration in Sion:
The largest precipitation sum in Sion is at