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Weather in Switzerland for September 2025

Your guide to Switzerland weather in September - trends and predictions
  • In general, the average temperature in Switzerland at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19 °C by the end of September.

  • Switzerland sees moderate rainfall in September, averaging 6 rainy days.

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

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/11°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Switzerland in September average weather

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Temperatures trend during September in Switzerland

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. Partly cloudy
Partly cloudy
27° /13° 0.8 mm 7
2 Sept. Sunny
Sunny
26° /13° 0.5 mm 7
3 Sept. Sunny
Sunny
27° /14° 4.2 mm 7
4 Sept. Mist
Mist
24° /13° 3.7 mm 6
5 Sept. Sunny
Sunny
24° /12° 0.8 mm 6
6 Sept. Mist
Mist
25° /11° 0 mm 6
7 Sept. Mist
Mist
28° /12° 0 mm 6
8 Sept. Fog
Fog
27° /14° 4.2 mm 6
9 Sept. Sunny
Sunny
23° /13° 6.7 mm 6
10 Sept. Sunny
Sunny
24° /12° 0.2 mm 6
11 Sept. Partly cloudy
Partly cloudy
23° /11° 7 mm 6
12 Sept. Thundery outbreaks possible
Thundery outbreaks possible
21° /10° 1.8 mm 5
13 Sept. Mist
Mist
15° /9° 5.4 mm 4
14 Sept. Fog
Fog
15° /9° 1.7 mm 4
15 Sept. Fog
Fog
20° /6° 0 mm 5
16 Sept. Mist
Mist
20° /7° 0.9 mm 5
17 Sept. Mist
Mist
20° /10° 1.4 mm 5
18 Sept. Light rain shower
Light rain shower
20° /9° 5.6 mm 5
19 Sept. Patchy rain possible
Patchy rain possible
18° /10° 0.6 mm 5
20 Sept. Partly cloudy
Partly cloudy
23° /8° 0 mm 6
21 Sept. Partly cloudy
Partly cloudy
23° /11° 0.9 mm 6
22 Sept. Light rain shower
Light rain shower
19° /9° 10.2 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
17° /10° 3.7 mm 4
24 Sept. Sunny
Sunny
19° /7° 0.2 mm 5
25 Sept. Mist
Mist
19° /5° 0.1 mm 5
26 Sept. Sunny
Sunny
18° /8° 18.4 mm 5
27 Sept. Sunny
Sunny
20° /8° 1.3 mm 5
28 Sept. Overcast
Overcast
17° /8° 3.9 mm 4
29 Sept. Partly cloudy
Partly cloudy
20° /7° 0 mm 5
30 Sept. Mist
Mist
20° /8° 0.7 mm 5
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Important Notice
Our weather forecast for Switzerland 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 Switzerland forecast closer to your planned date for the most up-to-date weather information.

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.

Switzerland in September - FAQ

Is September a good time to visit Switzerland?
Yes, September is a good time to traveling to Switzerland, read more about the best time to visit Switzerland.
What are the expected maximum and minimum temperatures in Switzerland during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Switzerland during September?
In September, Switzerland can expect light to moderate rainfall, totaling 36.8 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Switzerland during September?
The average wind speed in Switzerland during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

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
  • 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
Regions in Switzerland
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Location coordinates 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.

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