Weather in Switzerland for September 2025
In general, the average temperature in Switzerland at the beginning of September is 19.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.9 °C by the end of September.
Switzerland experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 123.7 mm.
Temperatures
Rain 🌧️
Switzerland Weather September
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  19° | 3  19° | 4 19° | 5 20° | 6 20° | 7 21° |
| 8 19° | 9  16° | 10 17° | 11  17° | 12 16° | 13 15° | 14 14° |
| 15 15° | 16 15° | 17 13° | 18 14° | 19 12° | 20 13° | 21  14° |
| 22 13° | 23 13° | 24 13° | 25 15° | 26 14° | 27  13° | 28 11° |
| 29 12° | 30 12° |
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Temperatures trend during September in Switzerland
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 19° /8° | 1.5 mm | 5 | |
| 2 Sept. | Patchy rain possible | 19° /8° | 3.1 mm | 4 | |
| 3 Sept. | Cloudy | 19° /9° | 3.4 mm | 4 | |
| 4 Sept. | Patchy rain possible | 19° /9° | 2.7 mm | 5 | |
| 5 Sept. | Cloudy | 20° /10° | 2.2 mm | 5 | |
| 6 Sept. | Cloudy | 20° /9° | 0.6 mm | 5 | |
| 7 Sept. | Sunny | 21° /10° | 1.7 mm | 6 | |
| 8 Sept. | Sunny | 19° /10° | 7.2 mm | 5 | |
| 9 Sept. | Heavy rain at times | 16° /9° | 6.6 mm | 4 | |
| 10 Sept. | Patchy rain possible | 17° /8° | 2.6 mm | 4 | |
| 11 Sept. | Moderate rain at times | 17° /8° | 2.8 mm | 4 | |
| 12 Sept. | Patchy rain possible | 16° /6° | 3.9 mm | 4 | |
| 13 Sept. | Patchy rain possible | 15° /7° | 8.4 mm | 4 | |
| 14 Sept. | Moderate rain at times | 14° /7° | 3.1 mm | 3 | |
| 15 Sept. | Moderate or heavy rain shower | 15° /7° | 6.5 mm | 4 | |
| 16 Sept. | Moderate or heavy rain shower | 15° /6° | 6.3 mm | 3 | |
| 17 Sept. | Patchy rain possible | 13° /6° | 3.4 mm | 3 | |
| 18 Sept. | Cloudy | 14° /5° | 3.4 mm | 4 | |
| 19 Sept. | Patchy rain possible | 12° /5° | 6.7 mm | 3 | |
| 20 Sept. | Moderate rain at times | 13° /5° | 1.2 mm | 3 | |
| 21 Sept. | Partly cloudy | 14° /4° | 0.7 mm | 4 | |
| 22 Sept. | Sunny | 13° /4° | 6.6 mm | 3 | |
| 23 Sept. | Sunny | 13° /3° | 3.8 mm | 4 | |
| 24 Sept. | Sunny | 13° /4° | 3.1 mm | 4 | |
| 25 Sept. | Moderate rain at times | 15° /4° | 2.8 mm | 4 | |
| 26 Sept. | Moderate rain at times | 14° /6° | 7.2 mm | 4 | |
| 27 Sept. | Overcast | 13° /5° | 4.7 mm | 3 | |
| 28 Sept. | Patchy rain possible | 11° /5° | 12.3 mm | 3 | |
| 29 Sept. | Patchy rain possible | 12° /4° | 3.7 mm | 3 | |
| 30 Sept. | Patchy rain possible | 12° /5° | 1.5 mm | 3 | |
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Guide for Switzerland in September
In Switzerland, September marks the transition from summer to autumn, bringing about a noticeable change in the weather. At the beginning of the month, the weather in Switzerland is generally mild and pleasant, with temperatures ranging from 15° in the lowlands to 10° in the mountains.
The days are still relatively long, allowing for ample opportunities to explore the picturesque landscapes and charming towns.
As the month progresses, the weather gradually begins to cool down, especially in the higher altitudes. By the end of September, temperatures can drop to around 10° in the lowlands and 5° in the mountains.
The autumn foliage starts to make an appearance, painting the Swiss countryside in stunning hues of red, orange, and yellow.
It's important to note that Switzerland's weather can vary significantly from region to region due to its diverse topography. While the lowlands may experience milder temperatures, the mountainous areas can be noticeably cooler, and there is a higher chance of precipitation.
Overall, September in Switzerland offers a delightful mix of lingering summer warmth and the first hints of autumn, making it an ideal time to experience the country's natural beauty and outdoor activities.
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Switzerland in September - FAQ
September rainfall patterns in Switzerland
UV exposure in Switzerland during September
Quick links
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