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Weather in Lausanne for September 2025

Your guide to Lausanne weather in September - trends and predictions
  • 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, ensuring that most days remain pleasantly dry.

  • Is September a good time to visit Lausanne? check out the best time to travel to Lausanne page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/14°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Lausanne in September average weather

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Temperatures trend during September in Lausanne

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
26° /15° 2.9 mm 6
2 Sept. Sunny
Sunny
24° /15° 1.6 mm 6
3 Sept. Sunny
Sunny
25° /16° 7.5 mm 6
4 Sept. Partly cloudy
Partly cloudy
23° /15° 7.2 mm 6
5 Sept. Sunny
Sunny
23° /15° 4.8 mm 6
6 Sept. Sunny
Sunny
24° /14° 0.1 mm 6
7 Sept. Sunny
Sunny
25° /16° 0 mm 7
8 Sept. Sunny
Sunny
24° /16° 5.5 mm 6
9 Sept. Sunny
Sunny
21° /15° 6.4 mm 5
10 Sept. Sunny
Sunny
23° /14° 0.9 mm 6
11 Sept. Partly cloudy
Partly cloudy
22° /14° 9.4 mm 6
12 Sept. Partly cloudy
Partly cloudy
19° /11° 3.5 mm 5
13 Sept. Overcast
Overcast
14° /10° 4.1 mm 4
14 Sept. Cloudy
Cloudy
16° /10° 0 mm 4
15 Sept. Cloudy
Cloudy
19° /9° 0 mm 5
16 Sept. Partly cloudy
Partly cloudy
19° /11° 0 mm 5
17 Sept. Sunny
Sunny
19° /12° 0.1 mm 5
18 Sept. Light rain shower
Light rain shower
18° /11° 13.8 mm 5
19 Sept. Patchy rain possible
Patchy rain possible
19° /11° 1.6 mm 5
20 Sept. Partly cloudy
Partly cloudy
20° /11° 0.2 mm 5
21 Sept. Light rain shower
Light rain shower
20° /11° 6.8 mm 5
22 Sept. Light rain shower
Light rain shower
18° /11° 11.9 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
15° /10° 15 mm 4
24 Sept. Sunny
Sunny
18° /9° 1.1 mm 5
25 Sept. Sunny
Sunny
18° /9° 0.2 mm 5
26 Sept. Sunny
Sunny
18° /11° 26.9 mm 5
27 Sept. Overcast
Overcast
17° /11° 3.6 mm 4
28 Sept. Sunny
Sunny
16° /10° 5.3 mm 5
29 Sept. Sunny
Sunny
18° /10° 0 mm 5
30 Sept. Sunny
Sunny
20° /12° 1.4 mm 5
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Important Notice
Our weather forecast for Lausanne 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 Lausanne forecast closer to your planned date for the most up-to-date weather information.

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

Is September a good time to visit Lausanne?
Yes, September is a good time to traveling to Lausanne, read more about the best time to visit Lausanne.
What are the expected maximum and minimum temperatures in Lausanne during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lausanne during September?
Moderate rainfall is anticipated in Lausanne during September, with a total of 67.6 mm spread over approximately 5 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Lausanne during September?
The average wind speed in Lausanne during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

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

Explore the daily rainfall trends and prepare for Lausannes September weather 💧

UV exposure in Lausanne during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Lausanne?

Get accurate weather forecasts for Lausanne, located at latitude 46.516 and longitude 6.633. Stay updated with localized weather information tailored for Lausanne.

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