Sion Weather in May
May in Sion sees daytime temperatures around 12°C (54°F) and lows of 2°C (36°F) at night. With around 163 mm (6.4 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Sion in May
Expect around 19 days of rain based on historical data, with 163 mm (6.4 in) average. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Sion in May
Daytime temperatures in Sion reach 12°C (54°F) in May, dropping to 2°C (36°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Sion in May
The month enjoys around 230 hours of sunshine, creating mostly sunny days despite the cool temperatures.
Wind Speed in Sion in May
Wind speeds average 2 m/s (4 knots) during May. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit Sion. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Temperature in May
Min Temperature
2°C (36°F)
Max Temperature
12°C (54°F)
Chance of Rain
65%
Precipitation
163 mm (6.4 in)
Rainy days
19 days
Humidity
62%
Windspeed
2 m/s (4 knots)
Sunshine
230 hours
Percentage Sunshine
56%
Best Places in Switzerland in May
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Sion in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Sion in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Sion climate overview or explore weather in Switzerland.
