Sion weather
Valais, Switzerland
What is the weather like in Sion? Mostly forecasts Sion, Valais, Switzerland from several models and says how far they agree.
Right now
19° Cloudy
- Feels like
- 17°
- Wind
- 11 km/h
- Humidity
- 54%
Forecast from 17/09/2026, 16:02
The outlook
The outlook is good.
Rain is rather unlikely over the next six hours. The temperature band shows the spread of the ICON ensemble.
Time for a round outside.
The next hours
| Time | Conditions | Temperature | Rain | Wind |
|---|---|---|---|---|
| 18:00 | Cloudy | 19° | 0% | 11 km/h |
| 19:00 | Cloudy | 18° | 0% | 5 km/h |
| 20:00 | Cloudy | 15° | 0% | 3 km/h |
| 21:00 | Cloudy | 15° | 0% | 2 km/h |
| 22:00 | Cloudy | 15° | 0% | 3 km/h |
| 23:00 | Cloudy | 14° | 3% | 3 km/h |
| 00:00 | Cloudy | 14° | 0% | 3 km/h |
| 01:00 | Cloudy | 13° | 0% | 5 km/h |
| 02:00 | Cloudy | 13° | 0% | 5 km/h |
| 03:00 | Mostly sunny | 12° | 0% | 5 km/h |
| 04:00 | Mostly sunny | 12° | 3% | 5 km/h |
| 05:00 | Mostly sunny | 12° | 0% | 5 km/h |
The next days
| Day | Conditions | Low / high | Rain | Wind |
|---|---|---|---|---|
| Thu 17/09 | Cloudy | 12° / 21° | 40% | 14 km/h |
| Fri 18/09 | Cloudy | 11° / 23° | 3% | 19 km/h |
| Sat 19/09 | Cloudy | 12° / 26° | 0% | 13 km/h |
| Sun 20/09 | Cloudy | 14° / 28° | 0% | 14 km/h |
| Mon 21/09 | Cloudy | 15° / 26° | 0% | 11 km/h |
| Tue 22/09 | Mostly sunny | 14° / 27° | 0% | 7 km/h |
| Wed 23/09 | Cloudy | 15° / 26° | 3% | 9 km/h |
| Thu 24/09 | Mostly sunny | 15° / 26° | 3% | 8 km/h |
| Fri 25/09 | Cloudy | 13° / 27° | 3% | 4 km/h |
| Sat 26/09 | Mostly sunny | 14° / 30° | 6% | 4 km/h |
Open Sion in the cockpitThe cockpit carries the band around every hour, the rain radar, and a place you can keep.
Common questions
- How reliable is the forecast for Sion?
- Mostly shows the ensemble band for every hour: the spread of the model runs. A narrow band means a clear situation, a wide one means several outcomes are still open. The further ahead, the wider it almost always gets.
- How often is the weather for Sion updated?
- The weather services run their models several times a day. This page refetches the forecast at least hourly, the cockpit every time it opens.
- Where does the weather data for Sion come from?
- From the national weather services’ models via Open-Meteo. Official warnings for Valais, Switzerland come from MeteoAlarm — in the wording of the source, not in ours.
Sources
- Weather data by Open-Meteo.com · CC BY 4.0