Weather in Switzerland for September 2025
In general, the average temperature in Switzerland at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.
Switzerland experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 85.6 mm.
Is September a good time to visit Switzerland? check out the best time to travel to Switzerland page.
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Switzerland in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  25° | 3 26° | 4  25° | 5  25° | 6 26° | 7  27° |
| 8 25° | 9 23° | 10  23° | 11 22° | 12 22° | 13 20° | 14  19° |
| 15  21° | 16 19° | 17 18° | 18 19° | 19 17° | 20 19° | 21 20° |
| 22 18° | 23 19° | 24 19° | 25 20° | 26 18° | 27 18° | 28 16° |
| 29 17° | 30 17° |
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Temperatures trend during September in Switzerland
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 25° /11° | 0.4 mm | 6 | |
| 2 Sept. | Partly cloudy | 25° /10° | 0.5 mm | 7 | |
| 3 Sept. | Overcast | 26° /12° | 2.7 mm | 6 | |
| 4 Sept. | Heavy rain at times | 25° /12° | 2.2 mm | 6 | |
| 5 Sept. | Patchy rain possible | 25° /12° | 0.5 mm | 6 | |
| 6 Sept. | Patchy rain possible | 26° /12° | 0.7 mm | 6 | |
| 7 Sept. | Sunny | 27° /12° | 0.1 mm | 6 | |
| 8 Sept. | Partly cloudy | 25° /13° | 6.3 mm | 6 | |
| 9 Sept. | Patchy rain possible | 23° /13° | 4.2 mm | 6 | |
| 10 Sept. | Moderate or heavy rain shower | 23° /12° | 2.9 mm | 5 | |
| 11 Sept. | Patchy rain possible | 22° /11° | 3.7 mm | 6 | |
| 12 Sept. | Patchy rain possible | 22° /9° | 0.9 mm | 5 | |
| 13 Sept. | Overcast | 20° /10° | 2.7 mm | 5 | |
| 14 Sept. | Cloudy | 19° /11° | 3.4 mm | 4 | |
| 15 Sept. | Fog | 21° /10° | 4.7 mm | 5 | |
| 16 Sept. | Heavy rain at times | 19° /10° | 3 mm | 5 | |
| 17 Sept. | Overcast | 18° /9° | 2.7 mm | 4 | |
| 18 Sept. | Overcast | 19° /8° | 2.9 mm | 4 | |
| 19 Sept. | Patchy rain possible | 17° /8° | 3.4 mm | 4 | |
| 20 Sept. | Patchy rain possible | 19° /7° | 0.4 mm | 5 | |
| 21 Sept. | Partly cloudy | 20° /8° | 0.4 mm | 5 | |
| 22 Sept. | Partly cloudy | 18° /6° | 5.1 mm | 5 | |
| 23 Sept. | Partly cloudy | 19° /8° | 2 mm | 5 | |
| 24 Sept. | Sunny | 19° /7° | 1.8 mm | 5 | |
| 25 Sept. | Mist | 20° /7° | 0.3 mm | 5 | |
| 26 Sept. | Patchy rain possible | 18° /9° | 10 mm | 5 | |
| 27 Sept. | Cloudy | 18° /8° | 4.9 mm | 5 | |
| 28 Sept. | Patchy rain possible | 16° /8° | 8.7 mm | 4 | |
| 29 Sept. | Patchy rain possible | 17° /8° | 3.5 mm | 4 | |
| 30 Sept. | Overcast | 17° /7° | 0.5 mm | 4 | |
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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
What to pack to Switzerland in September?
As you prepare for your trip to Switzerland in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Switzerland, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Switzerland
UV exposure in Switzerland during September
Quick links
Where is Switzerland?Get accurate weather forecasts for Switzerland, located at latitude 47.367 and longitude 8.55. Stay updated with localized weather information tailored for Switzerland.