St. Gallen weather in May (St.Gallen Canton, Switzerland)

How is the weather in St. Gallen in May? Check out this comprehensive weather guide.

In May, St. Gallen generally has pleasant temperatures and heavy rainfall. Throughout the daytime, temperatures often hover around 18°C (show in °F). However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 9°C.

St. Gallen in May falls under the rainy season with heavy rainfall, averaging around 171 mm (show in inches) for the month. Typically around 18 days of rainfall is expected.

The area enjoys a balanced 188 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

If you're inclined towards comfortable temperatures and drier conditions, May is a prime time to visit St. Gallen. May, June, July, August and September typically offer the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized St. Gallen climate page with graphs.


St. Gallen, monthly averages in May

Show in Fahrenheit
Min Temperature 8.8°C  
Max Temperature 18.2°C  
Chance of Rain 60%  
Precipitation 171 mm  
Rainy days 18 days  
Humidity 71%  
Sunshine 188 hours  
Percentage Sunshine 42%  

Where to go in Switzerland in May

Find out more about the weather in Switzerland in May and which places have the best weather 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 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So, what should you wear in St. Gallen in May?

For visitors traveling to St. Gallen, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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


Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in St. Gallen.

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 climate conditions. Find out where to go with our weather planner.