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 September 2026 Sun 16.5 ° C ( 61.6°F )  Sunny |
Feels Like : 13.6 ° C / 56.5°F Humidity : % 34 Pressure : 1024 mb Wind Speed : 5 kmph / 3.1 miles from W 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 7 |
15-day weather forecast for Sion Airport, Sion, Switzerland
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 13 September 2026 Sun |  Overcast |
8.6 ° C | 17.6 ° C | 12.5 ° C | % 62 | 8.3 km/h | 9% |
| 14 September 2026 Mon | Sunny |
9.7 ° C | 17.6 ° C | 13.2 ° C | % 68 | 7.9 km/h | 8% |
| 15 September 2026 Tue | Sunny |
10.4 ° C | 19.7 ° C | 14.5 ° C | % 69 | 8.3 km/h | 6% |
| 16 September 2026 Wed |  Light rain shower |
8.5 ° C | 15.7 ° C | 12.3 ° C | % 82 | 10.1 km/h | 81% |
| 17 September 2026 Thu |  Patchy rain nearby |
5.3 ° C | 12.7 ° C | 8.7 ° C | % 81 | 7.6 km/h | 67% |
| 18 September 2026 Fri | Patchy rain nearby |
5.2 ° C | 12.7 ° C | 8.9 ° C | % 74 | 6.5 km/h | 16% |
| 19 September 2026 Sat | Sunny |
7.4 ° C | 15.8 ° C | 11 ° C | % 69 | 7.9 km/h | 8% |
| 20 September 2026 Sun | Overcast |
9.2 ° C | 16.4 ° C | 12.3 ° C | % 66 | 6.8 km/h | 9% |
| 21 September 2026 Mon | Sunny |
10.4 ° C | 18.8 ° C | 14 ° C | % 60 | 7.2 km/h | 6% |
| 22 September 2026 Tue | Sunny |
12.3 ° C | 20.6 ° C | 15.5 ° C | % 63 | 8.6 km/h | 4% |
| 23 September 2026 Wed | Sunny |
12.6 ° C | 19.3 ° C | 15.3 ° C | % 68 | 7.9 km/h | 7% |
| 24 September 2026 Thu | Sunny |
13 ° C | 21 ° C | 16 ° C | % 67 | 9 km/h | 7% |
| 25 September 2026 Fri | Sunny |
13.4 ° C | 20.6 ° C | 16.2 ° C | % 65 | 6.5 km/h | 6% |
| 26 September 2026 Sat | Sunny |
13.5 ° C | 21 ° C | 16.5 ° C | % 60 | 7.6 km/h | 3% |
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