Switzerland weather in September 2025
Switzerland weather in September 2025
Day
20 °C
Night
11 °C
Precipitation
103 mm
in month
Rainy days
11 days
in month
Daylight
12 hours
average
Sunshine
6 hours
average
Humidity
77 %
Day
20 °C
Night
11 °C
Precipitation
103 mm
in month
Rainy days
11 days
in month
Daylight
12 hours
average
Sunshine
6 hours
average
Humidity
77 %
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Weather overview and FAQs
Weather overview
In Switzerland in September, the average air temperature ranges from 20 °C (67 °F) during the day to 11 °C (51 °F) at night. There are 11 days of rain on average, where the rainfall is 103 mm (4.06 in).
Are there good conditions to visit in Switzerland in September?
There are good conditions for visiting in Switzerland in September. There are some people, who may feel a slight chill at 20 °C (67 °F), but others will feel perfectly fine. The temperature of 11 °C (51 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What temperature can I expect during the day in Switzerland in September?
In Switzerland in September, the average daily temperatures will be 20 °C (67 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
What is the average number of rainy days in September in Switzerland?
In September in Switzerland, we can expect 11 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.6 days of the week, or in general - 37 % days.
How heavy is the precipitation in Switzerland in September?
There is precipitation of 103 mm (4.06 in) in Switzerland in September, which means 3 mm (0.13 in) rainfall per day on average.
What is the air temperature in September in Switzerland at night?
The average night temperature in Switzerland in September is 11 °C (51 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
How many sunny hours can I expect in September in Switzerland?
In Switzerland in September, you can expect around 6 hours of sunshine.
Is the temperature rising or falling in the course of time in September in Switzerland?
During September in Switzerland, the day temperatures are decreasing - from 22 °C (71 °F) at the beginning of the month to 17 °C (63 °F) at the end of the month.
How long is the day (from dawn till dusk) in Switzerland in September?
The length of daylight in Switzerland in September is 12 hours.
How windy is it in Switzerland in September?
In September in Switzerland, there will be an average wind scale of 2. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.
Is September part of the dry season in Switzerland?
No, September is not a dry month in Switzerland, expect rain approximately 11 days in a month.
Is Switzerland rainier in September than in October?
No, in Switzerland in September it does not rain more than in October.
What level of humidity is to expect in September in Switzerland?
Humidity in Switzerland in September is 77 %.
Is the weather in Switzerland warmer in September than in August?
No, in September in Switzerland the temperature is not higher than in August.
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