Herisau weather in September (St.Gallen Canton, Switzerland)

What can you expect from the weather in Herisau during September? Here's what the weather might have in store during this month.

In September, Herisau generally has pleasant temperatures and high rainfall. Throughout the day, temperatures typically settle at around 19°C. But by evening, they drop to around 10°C.

Herisau in September usually receives high rainfall, averaging around 157 mm for the month. Typically around 13 days of rainfall is expected.

The area enjoys a balanced 155 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Herisau. September typically offers the best circumstances. While January, February, March, April, November and December tend to showcase less optimal conditions.

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

 

Herisau, monthly averages in September

Min Temperature 10°C  

Max Temperature 19°C  

Chance of Rain 44%  

Precipitation 157 mm  

Rainy days 13 days  

Humidity 78% *  

Sunshine 155 hours *  

Percentage Sunshine 44% *  

* Data from: St. Gallen, Switzerland (8 KM, 5 Miles).

Where to go in Switzerland in September

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

Weather conditions Weather

Temperatures

Precipitation

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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).

So, what should you wear in Herisau in September?

For visitors traveling to Herisau, 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 September.

Swimming

6/10

Camping

3/10

Interested in more climate information?

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

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.