Sion, Switzerland: Best time to go and average weather

Discover the most favorable time to visit Sion in Switzerland from average climate conditions, on this page.

Best time to go to Switzerland?

When is the best time to go to Sion?

When is the best time to go to Sion? Here's some information to help you in your decision:

  • The best months for good weather in Sion are July, August and September
  • On average, the warmest months are July and August
  • February is the coldest month of the year
  • May is the rainiest month

For full information about the climate and weather in Sion a specific month, click on the corresponding line below:

Month Our opinion View Details
very bad weather Sion in january
very bad weather Sion in february
very bad weather Sion in march
very bad weather Sion in april
tolerable weather Sion in may
tolerable weather Sion in june
good weather Sion in july
good weather Sion in august
good weather Sion in september
bad weather Sion in october
very bad weather Sion in november
very bad weather Sion in december

Weather and climate in Sion

  • Between january and may the climate is very unfavorable. The record temperature this month is 30°C and it rains in may about 259mm.
  • From june to july the climate is correct. By early evening, the temperature averages 17°C and it rains about 196mm each month.
  • Between the months of august and september the climate is favorable. At lunchtime, it's 18°C in average and it rains about 46% of the time in september.
  • Between october and december the climate is the worst possible. the thermometer goes up to 4°C°C.

Chart: temperature and rainfall in Sion

The chart below allows you to look at the following seasonal norms for the city of Sion: minimum and maximum temperatures, and the monthly volume of precipitation for each month of the year.

Map of Switzerland

Sion appears on the map below with a blue icon. The other cities or locations in Switzerland appear on the map with a black icon. Click for information about the climate.

Sion other locations

Average weather and best time to go to other cities in Switzerland:

See full list of cities

Change units: