Switzerland weather in September 2026

Expect daytime maximum temperatures of 18°C in Switzerland in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 13 days with some rainfall and typically 80 mm of rainfall in the month.

  • 18°C maximum daytime temperature in September in Switzerland (Bern)18
    18°C max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in September in Switzerland (Bern)13
    13 days with some rainfall
  • 9°C minimum night-time temperature in September in Switzerland (Bern)9
    9°C min night temperature
  • 13 hours of daylight per day in September in Switzerland (Bern)13
    13 hours of daylight per day
  • No heat & humidity in September in Switzerland (Bern)0
    No heat & humidity
  • 80 mm monthly rainfall in September in Switzerland (Bern)80
    80 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Switzerland (Bern)5
    5 (Moderate) UV index

More about Switzerland

Switzerland by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Switzerland

SWISS: Cheap flights to Switzerland from £116

  • Book return flights to Switzerland from £116
  • Fly direct from the UK to Geneva & Zurich with SWISS
  • Connecting flights to destinations across Europe & beyond
Go to SWISS deal >>

View all SWISS offers

SwissLow fare finder

The September weather guide for Switzerland (Bern) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What is the weather in Switzerland in September like?

September marks the transition from summer to autumn in Switzerland, although at the beginning of the month, the weather can still feel quite summery.

As cooler air becomes more dominant, it generally brings more stable weather with fewer afternoon thunderstorms, especially in the Alps.

Cooling on the Central Plateau

On the Central Plateau, maximum daytime temperatures are a good 4°C lower than in August, though, of course, this is a gradual process, with each day becoming slightly cooler as the month progresses.

Daytime temperatures in the west may reach 20°C, but in the east, such as in Zurich, it is a degree cooler. As the month progresses, morning fogs become more common.

However, there is still sunshine to be enjoyed with around six hours a day on average across the plateau, with slightly more in the west than in the east.

Crisp & clear in the Jura Mountains

In the Jura Mountains, cooler conditions mean temperatures reach only the mid-teens during the day, dropping into single figures at night. Once again, there is about an hour less sunshine here than on the Plateau, and a little more rain. However, on clear days, the air is crisp with excellent visibility.

Clearest time of year in the Alps

In the Swiss Alps, September is also a great month for clear days, usually the clearest of the year. There is generally less moisture in the air, so summer haze is not such a feature.

At high elevations, it is easily possible to see over 100 kilometres, so this is a great time of year for hiking, and it is generally less crowded than in August.

In Alpine resorts such as St Moritz and Zermatt, expect temperatures to reach the mid-teens during the day, falling to near zero at night. During the month, there is an average of more than five hours of sunshine per day, so conditions are still pleasant.

Last summer sun in the south

Down on the lakes in the far south summer lingers a little longer in September than elsewhere in the country, especially in the first two weeks, but even here cooler weather gradually sets in.

The average daytime maximum temperature for the month in Locarno and Lugano is around 22°C, which is 5°C cooler than August. September is still a wet month, with rainfall often coming in heavy but mostly short-lived showers, although longer periods of rain are also possible.

Despite this, the region still enjoys around six-and-a-half hours of sunshine per day on average, allowing plenty of time for outdoor activities.

Switzerland temperatures in September

Below are average maximum temperatures at popular countries, regions and places in Switzerland in September. Select a holiday destination to see more weather parameters.

All Switzerland regions

All Switzerland destinations

More about Switzerland

How hot is it in Switzerland in September?

Daytime temperatures usually reach 18°C in Bern, Switzerland in September, falling to 9°C at night.

How sunny is it in Switzerland in September?

There are normally 6 hours of bright sunshine each day in Bern, Switzerland in September - that's 45% of daylight hours.

Does it rain in Switzerland in September?

There are usually 13 days with some rain in Bern, Switzerland in September and the average monthly rainfall is 80mm.

Switzerland September sunrise & sunset times

Browse the sunrise and sunset times for Switzerland in September 2026. Select a month to view Switzerland sunrise and sunset times for the next 12 months. The Switzerland sunrise and sunset times shown below are for Bern.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:50 19:10
Tuesday, 15th September 2026 06:08 18:42
Wednesday, 30th September 2026 06:27 18:12

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^