Sion weather in July
Temperature, rain and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Good
Best time to visit: May – October
What is the weather like in Sion in July?
In July, Sion is warm: daytime highs average 25 °C, and nights cool down to about 14 °C. The sun shines for around 9 hours a day. It rains often – on about 17 days, adding up to 173 mm. All in all, July is a good month for a holiday in Sion.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 15 h 27 min05:53 – 21:20
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 8 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 2 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+2Europe/Zurich
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %95 %
- Few rainy daysweight 30 %8 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Mountain air”.
What to pack in July
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Sion in July: quick answers
Is Sion hot in July?
Warm rather than hot: in July, daytime highs in Sion average 25 °C and nights cool to about 14 °C. On about 2 days the thermometer climbs to 30 °C or more.
Does it rain much in Sion in July?
It rains often – on about 17 days, adding up to 173 mm.
Sion month by month
The whole year in SionAll destinations: SwitzerlandWhere to go in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences