Geneva (Genève)
September
Weather in Geneva for September 2026
Your guide to Geneva weather in September - trends and predictions
So far, September 2026 in Geneva is slightly warmer than the historical average by 0.6 °C.
The forecast for the upcoming days in Geneva predicts a temperature of 21.2 °C, which is slightly above the historical average.
In general, the average temperature in Geneva at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °C by the end of September.
The climate of Geneva in September is notably wet, with an average of 13 rainy days, and a total of 159.9 mm of precipitation.
Temperatures
Rain 🌧️
17
Dry days
13
Rainy days
0
Snow days
21°/10°
Temperatures
9 km/h
Avg max wind
77 %
Avg humidity
Geneva Weather September
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What’s the Weather Like in Geneva This September?
Discover the average temperatures and weather trends across Geneva’s cities this September.
Temperatures trend during September in Geneva
See the weather trend as well as the moving average line
September weather in Geneva day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 24° /11° | 7.4 mm | 6 | |
| 2 Sept. |  Patchy rain possible | 25° /12° | 3 mm | 6 | |
| 3 Sept. | Sunny | 25° /13° | 7.5 mm | 6 | |
| 4 Sept. | Sunny | 26° /13° | 9.9 mm | 6 | |
| 5 Sept. | Light rain shower | 25° /13° | 1.4 mm | 6 | |
| 6 Sept. | Sunny | 26° /12° | 1.8 mm | 6 | |
| 7 Sept. | Sunny | 27° /13° | 3.6 mm | 6 | |
| 8 Sept. | Sunny | 26° /14° | 7.1 mm | 6 | |
| 9 Sept. |  Partly cloudy | 22° /12° | 5.6 mm | 5 | |
| 10 Sept. | Patchy rain possible | 21° /11° | 1.8 mm | 5 | |
| 11 Sept. | Partly cloudy | 22° /11° | 3.3 mm | 6 | |
| 12 Sept. | Partly cloudy | 23° /9° | 0.4 mm | 6 | |
| 13 Sept. | Partly cloudy | 22° /10° | 3 mm | 5 | |
| 14 Sept. | Patchy rain possible | 21° /12° | 6.2 mm | 5 | |
| 15 Sept. |  Moderate rain at times | 24° /11° | 6.3 mm | 5 | |
| 16 Sept. | Patchy rain possible | 20° /11° | 4.6 mm | 5 | |
| 17 Sept. |  Overcast | 19° /10° | 0.1 mm | 5 | |
| 18 Sept. | Overcast | 21° /9° | 3.9 mm | 5 | |
| 19 Sept. | Sunny | 20° /8° | 4.5 mm | 5 | |
| 20 Sept. | Sunny | 21° /9° | 1.3 mm | 5 | |
| 21 Sept. |  Patchy light drizzle | 21° /8° | 6.2 mm | 5 | |
| 22 Sept. | Sunny | 21° /10° | 0 mm | 5 | |
| 23 Sept. | Sunny | 21° /10° | 0 mm | 4.7 | |
| 24 Sept. | Sunny | 22° /12° | 0 mm | 4.1 | |
| 25 Sept. | Sunny | 20° /10° | 0 mm | 6 | |
| 26 Sept. | Sunny | 20° /10° | 0 mm | 5 | |
| 27 Sept. | Overcast | 22° /12° | 0 mm | 5 | |
| 28 Sept. | Overcast | 17° /12° | 0.8 mm | 3 | |
| 29 Sept. | Overcast | 19° /12° | 0 mm | 5 | |
| 30 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
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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.
Change Month
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 159.9 mm is expected in Geneva during September, occurring over more than 13 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 💧
Typically, Geneva has 13 rainy days in September with a total of 159.9 mm of rainfall.
UV exposure in Geneva during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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