Sion Airport (SIR) 15 Day Weather Forecast, Sion Switzerland
Current weather conditions and 15 day weather forecast for Sion Airport in Sion, Switzerland including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at SIR
| 13 December 2025 Sat -1.9 ° C ( 28.6°F )  Clear |
Feels Like : -4.7 ° C / 23.6°F Humidity : % 93 Pressure : 1030 mb Wind Speed : 7.2 kmph / 4.5 miles from E 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15-day weather forecast for Sion Airport, Sion, Switzerland
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 13 December 2025 Sat | Sunny |
-4.1 ° C | 3.6 ° C | -1.9 ° C | % 80 | 8.3 km/h | 0% |
| 14 December 2025 Sun | Sunny |
-4.3 ° C | 3.5 ° C | -1.9 ° C | % 77 | 9.7 km/h | 0% |
| 15 December 2025 Mon | Sunny |
-4 ° C | 2.5 ° C | -1.8 ° C | % 80 | 12.2 km/h | 0% |
| 16 December 2025 Tue |  Partly Cloudy |
-3.1 ° C | 2.3 ° C | -1 ° C | % 88 | 12.2 km/h | 0% |
| 17 December 2025 Wed |  Mist |
-2.8 ° C | 1.5 ° C | -0.9 ° C | % 93 | 6.5 km/h | 77% |
| 18 December 2025 Thu | Sunny |
-3.4 ° C | 2.2 ° C | -1.7 ° C | % 85 | 10.8 km/h | 0% |
| 19 December 2025 Fri | Sunny |
-3.9 ° C | 1.9 ° C | -1.9 ° C | % 80 | 10.8 km/h | 0% |
| 20 December 2025 Sat |  Patchy moderate snow |
-3.3 ° C | 1.5 ° C | -1.6 ° C | % 83 | 6.5 km/h | 62% |
| 21 December 2025 Sun |  Light freezing rain |
-3.3 ° C | -0.3 ° C | -2.1 ° C | % 94 | 5.8 km/h | 86% |
| 22 December 2025 Mon | Sunny |
-4.7 ° C | 2.6 ° C | -2.4 ° C | % 82 | 7.9 km/h | 0% |
| 23 December 2025 Tue | Sunny |
-4.4 ° C | 2.2 ° C | -2.4 ° C | % 79 | 10.1 km/h | 0% |
| 24 December 2025 Wed | Sunny |
-5.6 ° C | 1.1 ° C | -3.5 ° C | % 72 | 8.6 km/h | 0% |
| 25 December 2025 Thu | Sunny |
-5.9 ° C | 0.8 ° C | -3.8 ° C | % 71 | 8.6 km/h | 0% |
| 26 December 2025 Fri | Light freezing rain |
-6 ° C | -0.4 ° C | -3.6 ° C | % 81 | 9.4 km/h | 83% |
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