Interlaken in september: average Weather, Temperature and Climate
Weather in Interlaken in september 2025
The weather in Interlaken in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather 6.8cm
Weather at 6am
43°F
Clear/Sunny
34% of time
21%
20%
16%
Weather at 12pm
58°F
Clear/Sunny
46% of time
19%
16%
10%
Weather at 6pm
47°F
Fog
28% of time
28%
18%
9%
Weather at 3am
43°F
26%
25%
24%
17%
Evolution of daily average temperature and precipitation in Interlaken in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Interlaken in september.
The climate of Interlaken in september is tolerable
The weather in september in Interlaken is wet (with 6in of precipitation over 8 days). This is better than the previous month since in august it receives an average of 10.8in of rainfall over 13 days.
The climate is fairly fresh here the month of september, but it is liveable when dressing hot. Temperatures are up to 58°F. The minimum is 43°F. Thus, the mean temperature average on this month of september in Interlaken is 50°F. Note that seasonal normals are in contrast with those observed in Interlaken in september with a maximum record of 76°F in 2009 and a minimum record of 22°F in 2010. You can plan to have about 5 days with temperatures over 65°F, or 17% of time.
Day length in Interlaken in september is 12:34. The sun rises at 06:06 and sets at 18:40.
With proper weather, this month is okay (but not the best) to go there.
September: another location in Switzerland?
If you want to go to Switzerland in september, there are destinations with better weather than Interlaken:
In september, Zurich, Basel, Geneva, Lausanne, Lucerne and Lugano have good weather.
Seasonal average climate and temperature of Interlaken in september
Check below seasonal norms These statistics are set from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 50°F | ||||
| Highest temperature | 58°F | ||||
| Lowest temperature | 43°F | ||||
| Highest record temperature | 76°F (2009) | ||||
| Lowest record temperature | 22°F (2010) | ||||
| Number of days at +65°F | 5 day(s) (17%) | ||||
| Number of days at -32°F | 2 day(s) (7%) | ||||
| Wind | |||||
| Wind speed | 9km/h | ||||
| Wind temperature | 43°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 6in | ||||
| Number of days with rainfall | 8 day(s) (28%) | ||||
| Record daily rainfall | 2.8in (2016) | ||||
| Snowfall | 6.8cm | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 7.74km | ||||
| Cloud cover | 42% | ||||
| UV index | 3 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:06 | ||||
| Time of sunset | 18:40 | ||||
| Length of day | 12:34 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Interlaken in september 2024:
54°F to 70°F
50°F to 63°F
50°F to 67°F
50°F to 59°F
49°F to 58°F
47°F to 61°F
47°F to 70°F
49°F to 63°F
45°F to 47°F
45°F to 56°F
40°F to 54°F
36°F to 41°F
31°F to 36°F
32°F to 40°F
31°F to 45°F
32°F to 49°F
40°F to 45°F
34°F to 54°F
40°F to 54°F
40°F to 58°F
41°F to 58°F
43°F to 58°F
41°F to 49°F
41°F to 49°F
38°F to 54°F
45°F to 50°F
40°F to 47°F
36°F to 36°F
31°F to 49°F
41°F to 56°F
Map: other cities in Switzerland in september
Cities near Interlaken:
| Frutigen in september | tolerable weather |
| Thun in september | good weather |
| Entlebuch in september | good weather |
| Sarnen in september | tolerable weather |
| Brig in september | very bad weather |
| Bern in september | tolerable weather |
| Visp in september | very bad weather |
| Burgdorf in september | tolerable weather |
| Gstaad in september | tolerable weather |
| Sierre in september | very bad weather |
| Lucerne in september | good weather |
| Fribourg in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Interlaken
perfect weather
good
tolerable
bad
very bad
Weather data for Interlaken in september:
Weather data for Interlaken for september are derived from an average of the weather forecast since 2009 in Interlaken. There is a margin of error and these forecasts are to be considered as general information only. The weather in Interlaken can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Interlaken.