Bern
September
Weather in Bern for September 2025
Your guide to Bern weather in September - trends and predictions
Until now, September 2025 in Bern is cooler than usual, with temperatures averaging 19.2 °C, this is -3.5 °C below the typical seasonal average.
The forecast for the next days in Bern predicts temperatures to be around 21 °C, close to the historical average.
In general, the average temperature in Bern at the beginning of September is 23.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °C by the end of September.
Bern experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 97.1 mm.
Temperatures
Rain 🌧️
6
Dry days
24
Rainy days
0
Snow days
20°/9°
Temperatures
9 km/h
Avg max wind
79 %
Avg humidity
Bern Weather September
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What’s the Weather Like in Bern This September?
Discover the average temperatures and weather trends across Bern’s cities this September.
Temperatures trend during September in Bern
See the weather trend as well as the moving average line
September weather in Bern day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 22° /9° | 4 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 24° /9° | 4.7 mm | 6 | |
| 3 Sept. | Partly cloudy | 24° /10° | 3.1 mm | 6 | |
| 4 Sept. | Patchy rain possible | 24° /11° | 7.1 mm | 6 | |
| 5 Sept. |  Sunny | 23° /10° | 2.7 mm | 6 | |
| 6 Sept. | Sunny | 24° /10° | 0 mm | 6 | |
| 7 Sept. | Sunny | 26° /11° | 0.5 mm | 7 | |
| 8 Sept. | Sunny | 24° /12° | 5.1 mm | 6 | |
| 9 Sept. | Light rain shower | 21° /11° | 6.9 mm | 5 | |
| 10 Sept. | Patchy rain possible | 21° /10° | 1.6 mm | 5 | |
| 11 Sept. | Patchy rain possible | 21° /9° | 3.5 mm | 5 | |
| 12 Sept. | Patchy rain possible | 21° /8° | 1.9 mm | 5 | |
| 13 Sept. | Partly cloudy | 20° /8° | 3.5 mm | 5 | |
| 14 Sept. |  Cloudy | 18° /9° | 2.4 mm | 4 | |
| 15 Sept. | Patchy rain possible | 24° /10° | 4.1 mm | 1.3 | |
| 16 Sept. | Patchy rain possible | 16° /9° | 0.4 mm | 0.8 | |
| 17 Sept. | Partly cloudy | 20° /7° | 0 mm | 0.7 | |
| 18 Sept. | Sunny | 24° /10° | 0 mm | 1.4 | |
| 19 Sept. | Sunny | 25° /10° | 0 mm | 4 | |
| 20 Sept. | Sunny | 26° /11° | 0 mm | 5 | |
| 21 Sept. | Partly cloudy | 23° /13° | 0.1 mm | 5 | |
| 22 Sept. | Patchy rain possible | 21° /13° | 2.1 mm | 4 | |
| 23 Sept. | Patchy rain possible | 19° /12° | 4.1 mm | 3 | |
| 24 Sept. | Patchy rain possible | 20° /11° | 0.1 mm | 3 | |
| 25 Sept. | Patchy rain possible | 19° /11° | 2.1 mm | 3 | |
| 26 Sept. | Patchy rain possible | 16° /9° | 3.7 mm | 3 | |
| 27 Sept. | Cloudy | 20° /7° | 0 mm | 3 | |
| 28 Sept. | Patchy rain possible | 15° /7° | 10.7 mm | 4 | |
| 29 Sept. | Patchy rain possible | 17° /6° | 3.1 mm | 4 | |
| 30 Sept. | Patchy rain possible | 16° /6° | 0.4 mm | 4 | |
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Important Notice
Our weather forecast for Bern 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 Bern forecast closer to your planned date for the most up-to-date weather information.
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Bern in September - FAQ
What are the expected maximum and minimum temperatures in Bern during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Bern during September?
Moderate rainfall is anticipated in Bern during September, with a total of 97.1 mm spread over approximately 24 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Bern during September?
The average wind speed in Bern during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Bern
Explore the daily rainfall trends and prepare for Berns September weather 💧
UV exposure in Bern during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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