Interlaken
September
Weather in Interlaken for September 2026
Your guide to Interlaken weather in September - trends and predictions
In general, the average temperature in Interlaken at the beginning of September is 18.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12 °C by the end of September.
The climate of Interlaken in September is notably wet, with an average of 15 rainy days, and a total of 573.5 mm of precipitation.
Temperatures
Rain 🌧️
15
Dry days
15
Rainy days
0
Snow days
19°/3°
Temperatures
8 km/h
Avg max wind
79 %
Avg humidity
Interlaken Weather September
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Temperatures trend during September in Interlaken
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September weather in Interlaken day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 17° /7° | 6.5 mm | 4 | |
| 2 Sept. |  Patchy rain possible | 18° /8° | 5.4 mm | 4 | |
| 3 Sept. |  Cloudy | 18° /8° | 2.8 mm | 4 | |
| 4 Sept. | Patchy rain possible | 18° /8° | 7.7 mm | 5 | |
| 5 Sept. | Cloudy | 18° /9° | 3.1 mm | 5 | |
| 6 Sept. | Cloudy | 20° /8° | 0.5 mm | 5 | |
| 7 Sept. | Sunny | 21° /9° | 1.3 mm | 6 | |
| 8 Sept. | Sunny | 18° /10° | 6.4 mm | 5 | |
| 9 Sept. | Light rain shower | 15° /8° | 7.2 mm | 4 | |
| 10 Sept. | Patchy rain possible | 16° /8° | 2.9 mm | 4 | |
| 11 Sept. |  Moderate rain at times | 16° /7° | 2.4 mm | 4 | |
| 12 Sept. | Light rain shower | 15° /5° | 3.2 mm | 4 | |
| 13 Sept. | Patchy rain possible | 15° /7° | 7.6 mm | 3 | |
| 14 Sept. | Light rain shower | 14° /7° | 3.8 mm | 3 | |
| 15 Sept. | Moderate or heavy rain shower | 16° /7° | 6.6 mm | 4 | |
| 16 Sept. | Light rain shower | 14° /6° | 5.5 mm | 3 | |
| 17 Sept. | Patchy rain possible | 13° /5° | 2.7 mm | 3 | |
| 18 Sept. | Cloudy | 15° /5° | 2.7 mm | 4 | |
| 19 Sept. | Patchy rain possible | 14° /6° | 5.3 mm | 3 | |
| 20 Sept. | Patchy rain possible | 15° /6° | 1.2 mm | 4 | |
| 21 Sept. |  Partly cloudy | 15° /4° | 3.3 mm | 4 | |
| 22 Sept. | Sunny | 12° /4° | 13 mm | 3 | |
| 23 Sept. | Sunny | 12° /3° | 4.5 mm | 3 | |
| 24 Sept. | Sunny | 12° /4° | 2.9 mm | 3 | |
| 25 Sept. | Moderate rain at times | 13° /4° | 2.8 mm | 4 | |
| 26 Sept. | Moderate rain at times | 12° /5° | 7.2 mm | 3 | |
| 27 Sept. |  Overcast | 12° /4° | 4.7 mm | 3 | |
| 28 Sept. | Patchy rain possible | 11° /4° | 9.8 mm | 3 | |
| 29 Sept. | Patchy rain possible | 12° /4° | 3 mm | 3 | |
| 30 Sept. | Patchy rain possible | 12° /4° | 1.2 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Interlaken in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Interlaken forecast closer to your planned date for the most up-to-date weather information.
Change Month
Interlaken in September - FAQ
What are the expected maximum and minimum temperatures in Interlaken during September?
During September, expect a variety of temperatures with highs around 19° and lows near 3°, suitable for diverse activities and preferences.
How much rainfall should be expected in Interlaken during September?
Significant rainfall exceeding 573.5 mm is expected in Interlaken during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Interlaken during September?
The average wind speed in Interlaken during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Interlaken
Explore the daily rainfall trends and prepare for Interlakens September weather 💧
UV exposure in Interlaken during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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