Weather in Lausanne for September 2025
In general, the average temperature in Lausanne at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.
With an average of 5 rainy days, Lausanne experiences minimal rainfall in September.
Is September a good time to visit Lausanne? check out the best time to travel to Lausanne page.
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Lausanne in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2 24° | 3 25° | 4  23° | 5 23° | 6 24° | 7 25° |
| 8 24° | 9 21° | 10 23° | 11 22° | 12 19° | 13  14° | 14  16° |
| 15 19° | 16 19° | 17 19° | 18  18° | 19 19° | 20 20° | 21 20° |
| 22 18° | 23 15° | 24 18° | 25 18° | 26 18° | 27 17° | 28 16° |
| 29 18° | 30 20° |
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Temperatures trend during September in Lausanne
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 26° /15° | 2.9 mm | 6 | |
| 2 Sept. | Sunny | 24° /15° | 1.6 mm | 6 | |
| 3 Sept. | Sunny | 25° /16° | 7.5 mm | 6 | |
| 4 Sept. | Partly cloudy | 23° /15° | 7.2 mm | 6 | |
| 5 Sept. | Sunny | 23° /15° | 4.8 mm | 6 | |
| 6 Sept. | Sunny | 24° /14° | 0.1 mm | 6 | |
| 7 Sept. | Sunny | 25° /16° | 0 mm | 7 | |
| 8 Sept. | Sunny | 24° /16° | 5.5 mm | 6 | |
| 9 Sept. | Sunny | 21° /15° | 6.4 mm | 5 | |
| 10 Sept. | Sunny | 23° /14° | 0.9 mm | 6 | |
| 11 Sept. | Partly cloudy | 22° /14° | 9.4 mm | 6 | |
| 12 Sept. | Partly cloudy | 19° /11° | 3.5 mm | 5 | |
| 13 Sept. | Overcast | 14° /10° | 4.1 mm | 4 | |
| 14 Sept. | Cloudy | 16° /10° | 0 mm | 4 | |
| 15 Sept. | Cloudy | 19° /9° | 0 mm | 5 | |
| 16 Sept. | Partly cloudy | 19° /11° | 0 mm | 5 | |
| 17 Sept. | Sunny | 19° /12° | 0.1 mm | 5 | |
| 18 Sept. | Light rain shower | 18° /11° | 13.8 mm | 5 | |
| 19 Sept. | Patchy rain possible | 19° /11° | 1.6 mm | 5 | |
| 20 Sept. | Partly cloudy | 20° /11° | 0.2 mm | 5 | |
| 21 Sept. | Light rain shower | 20° /11° | 6.8 mm | 5 | |
| 22 Sept. | Light rain shower | 18° /11° | 11.9 mm | 4 | |
| 23 Sept. | Patchy rain possible | 15° /10° | 15 mm | 4 | |
| 24 Sept. | Sunny | 18° /9° | 1.1 mm | 5 | |
| 25 Sept. | Sunny | 18° /9° | 0.2 mm | 5 | |
| 26 Sept. | Sunny | 18° /11° | 26.9 mm | 5 | |
| 27 Sept. | Overcast | 17° /11° | 3.6 mm | 4 | |
| 28 Sept. | Sunny | 16° /10° | 5.3 mm | 5 | |
| 29 Sept. | Sunny | 18° /10° | 0 mm | 5 | |
| 30 Sept. | Sunny | 20° /12° | 1.4 mm | 5 | |
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Guide for Lausanne in September
In Lausanne, Switzerland, September marks the transition from summer to autumn, bringing about a noticeable change in the weather. At the beginning of the month, Lausanne experiences lingering warmth from the summer season, with average temperatures around 20°.
The days are generally pleasant, with mild temperatures and occasional sunshine, making it an ideal time for outdoor activities and sightseeing. However, as the month progresses, the weather gradually cools down, and by the end of September, the average temperatures drop to around 16°.
The evenings become cooler, and there is a higher chance of experiencing light rain showers as the autumnal weather sets in.
Overall, September in Lausanne offers a mix of late summer warmth and early autumn coolness, creating a pleasant and comfortable atmosphere for visitors. It's a great time to explore the city's charming streets, enjoy the beautiful views of Lake Geneva, and indulge in the local cuisine.
Travelers should pack a variety of clothing to accommodate the changing weather, including light layers for the warmer days and a jacket or sweater for the cooler evenings.
Lausanne in September - FAQ
What to pack to Lausanne in September?
As you prepare for your trip to Lausanne 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 Lausanne, 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 Lausanne
UV exposure in Lausanne during September
Quick links
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