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Sion weather in May (Canton of Valais, Switzerland)

Wondering what the weather is like in Sion during May? See what weather conditions to anticipate this month with our guide.

Temperatures

During May, Sion usually has moderate temperatures and heavy rainfall. Monthly maximum daytime temperatures generally peak at 12°C, but after sunset, they often decrease to around 2°C.

Precipitation

Sion in May usually receives heavy rainfall, averaging around 163 mm for the month. Typically, about 19 days will experience rainfall.

Average sunshine

The month enjoys around 230 hours of sunshine, creating mostly sunny days with good weather conditions.

Average windspeed

May sees wind speeds averaging 2 m/s. You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

May in Sion can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit Switzerland, check out our Sion's climate page.

Sion, monthly averages in May

Min TemperatureMin Temperature 2°C  
Max TemperatureMax Temperature 12°C  
Chance of RainChance of Rain 65%  
PrecipitationPrecipitation 163 mm  
Rainy daysRainy days 19 days  
HumidityHumidity 62%  
WindspeedWindspeed 2 m/s  
SunshineSunshine 230 hours  
Percentage SunshinePercentage Sunshine 56%  

Where to go in Switzerland in May

Find out more about the weather in Switzerland and which places have the best travel conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit Switzerland, check out our Sion's climate page.

So, what should you wear in this month?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming
4/10
Cycling
5/10
Walking
5/10
Camping
3/10
Outdoor sports
5/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Sion.

Our site offers climate and forecast data for every country in the world. Are you going to Switzerland? On this website you can find historical weather averages for many cities in Switzerland. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.