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Switzerland weather

Weather in Geneva for September 2025

Your guide to Geneva weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Geneva is cooler than usual, with temperatures averaging 20.8 °C, this is -2.6 °C below the typical seasonal average.

  • The forecast for the next days in Geneva predicts temperatures to be around 19 °C, close to the historical average.

  • In general, the average temperature in Geneva at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • Geneva experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 152.9 mm.

Average dry days
2
Dry days
Average rainy days
28
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/10°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Geneva Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Cloudy
24°
2
Patchy rain possible
24°
3
Moderate rain at times
25°
4
Patchy rain possible
25°
5
Light rain shower
25°
6
Sunny
26°
7
Sunny
27°
8
Sunny
25°
9
Partly cloudy
22°
10
Patchy rain possible
22°
11
Partly cloudy
22°
12
Partly cloudy
23°
13
Partly cloudy
21°
14
Patchy rain possible
20°
15
Moderate rain at times
23°
16
Moderate or heavy rain shower
20°
17
Overcast
18°
18
Sunny
25°
19
Sunny
26°
20
Sunny
27°
21
Patchy rain possible
25°
22
Heavy rain
15°
23
Patchy rain possible
17°
24
Patchy rain possible
18°
25
Sunny
18°
26
Partly cloudy
18°
27
Patchy rain possible
15°
28
Partly cloudy
14°
29
Partly cloudy
15°
30
Partly cloudy
16°

What’s the Weather Like in Geneva This September?

Discover the average temperatures and weather trends across Geneva’s cities this September.
Patchy rain possibleGenève21 °C / 10 °CPatchy rain possibleCarouge21 °C / 10 °CMore Locations

Temperatures trend during September in Geneva

See the weather trend as well as the moving average line

September weather in Geneva day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Cloudy
Cloudy
 24° /11° 8.8 mm 6
2 Sept. Patchy rain possible
Patchy rain possible
 24° /11° 3.5 mm 6
3 Sept. Moderate rain at times
Moderate rain at times
 25° /12° 9 mm 6
4 Sept. Patchy rain possible
Patchy rain possible
 25° /13° 11.9 mm 6
5 Sept. Light rain shower
Light rain shower
 25° /12° 1.7 mm 6
6 Sept. Sunny
Sunny
 26° /11° 2.1 mm 6
7 Sept. Sunny
Sunny
 27° /12° 4.3 mm 7
8 Sept. Sunny
Sunny
 25° /13° 8.4 mm 6
9 Sept. Partly cloudy
Partly cloudy
 22° /12° 3.8 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 22° /11° 2.2 mm 5
11 Sept. Partly cloudy
Partly cloudy
 22° /11° 3.9 mm 5
12 Sept. Partly cloudy
Partly cloudy
 23° /9° 0.5 mm 6
13 Sept. Partly cloudy
Partly cloudy
 21° /10° 3.6 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 7.5 mm 5
15 Sept. Moderate rain at times
Moderate rain at times
 23° /11° 7.6 mm 5
16 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /10° 5.4 mm 5
17 Sept. Overcast
Overcast
 18° /10° 0.1 mm 5
18 Sept. Sunny
Sunny
 25° /10° 0 mm 1.4
19 Sept. Sunny
Sunny
 26° /12° 0 mm 1.4
20 Sept. Sunny
Sunny
 27° /14° 0 mm 1.4
21 Sept. Patchy rain possible
Patchy rain possible
 25° /12° 2.7 mm 1.2
22 Sept. Heavy rain
Heavy rain
 15° /12° 20.4 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 17° /8° 1.5 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 18° /6° 0.3 mm 3
25 Sept. Sunny
Sunny
 18° /6° 0 mm 4
26 Sept. Partly cloudy
Partly cloudy
 18° /6° 0 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 15° /6° 3.4 mm 3
28 Sept. Partly cloudy
Partly cloudy
 14° /4° 0 mm 3
29 Sept. Partly cloudy
Partly cloudy
 15° /3° 0 mm 3
30 Sept. Partly cloudy
Partly cloudy
 16° /4° 0 mm 3
Next
Important Notice
Our weather forecast for Geneva 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 Geneva forecast closer to your planned date for the most up-to-date weather information.
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Geneva in September - FAQ

What are the expected maximum and minimum temperatures in Geneva during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Geneva during September?
Significant rainfall exceeding 152.9 mm is expected in Geneva during September, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Geneva during September?
The average wind speed in Geneva during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Geneva

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

UV exposure in Geneva during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Geneva?

Get accurate weather forecasts for Geneva, located at latitude 46.202 and longitude 6.146. Stay updated with localized weather information tailored for Geneva.

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