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Climate · Interlaken

Interlaken in September

Warm and wet, as the days shorten.

Typical weather, averaged over 30 years

September in Interlaken is warm: highs near 71°F, lows near 48°F. Rain falls on about four days a week, and the days shorten by 1 hour 12 minutes from the first week to the last.September in Interlaken is warm: highs near 22°C, lows near 9°C. Rain falls on about four days a week, and the days shorten by 1 hour 12 minutes from the first week to the last.

High
71°F22°Caverage
Low
48°F9°Caverage
Wet days
4a week · 55% of days
Daylight
12h 27mon average

Is September a good time to visit Interlaken?

Yes. September is one of Interlaken's best months (June to September).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 71°F in September, against 43°F to 78°F through the year.Highs near 22°C in September, against 6°C to 26°C through the year.

Chance of a wet day

55% of days in September, against 46% to 71% through the year.

Cloud cover

52% cover in September, against 45% to 63% through the year.

Daylight

12h 27m in September, against 8h 37m to 15h 47m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August78°26°low 55°low 13°5 wet days a weekRain on about five days a week.
  2. September71°22°low 48°low 9°4 wet days a weekRain on about four days a week.
  3. October65°18°low 42°low 6°3 wet days a weekRain on about three days a week.

Where Interlaken sits, in September

Europe/Zurich
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
7:05 AMsets 7:43 PM
Above the sea
570 mlow-lying
Latitude
46.7°Nnorthern hemisphere
Nearest of ours
Wengen10 km south-east

The land around Interlaken, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Switzerland in September

high · low · wet days
See September on the planning mapThe whole year in Interlaken

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Interlaken. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (570 m) against the climate model's (1,314 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (570 m) against the climate model's (1,314 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.