Geneva (Genève)
September
Weather in Geneva for September 2025
Your guide to Geneva weather in September - trends and predictions
In general, the average temperature in Geneva at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.1 °C by the end of September.
Geneva experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 152.9 mm.
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Temperatures
Rain 🌧️
More
2
Dry days
28
Rainy days
0
Snow days
21°/10°
Temperatures
9 km/h
Avg max wind
76 %
Avg humidity
Geneva in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  25° | 3  25° | 4 25° | 5 26° | 6  27° | 7 27° |
| 8 26° | 9  23° | 10 23° | 11 23° | 12 23° | 13 21° | 14  20° |
| 15 22° | 16 20° | 17 18° | 18 19° | 19 18° | 20 19° | 21 21° |
| 22 19° | 23 19° | 24 20° | 25 20° | 26  18° | 27 18° | 28 17° |
| 29 17° | 30 17° |
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Temperatures trend during September in Geneva
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Cloudy | 26° /11° | 1.4 mm | 6 | |
| 2 Sept. | Patchy rain possible | 25° /12° | 3.9 mm | 6 | |
| 3 Sept. | Moderate rain at times | 25° /13° | 11.2 mm | 6 | |
| 4 Sept. | Patchy rain possible | 25° /13° | 3.7 mm | 6 | |
| 5 Sept. | Cloudy | 26° /13° | 1.3 mm | 6 | |
| 6 Sept. | Sunny | 27° /12° | 2.7 mm | 6 | |
| 7 Sept. | Sunny | 27° /13° | 5.4 mm | 7 | |
| 8 Sept. | Sunny | 26° /13° | 9.1 mm | 6 | |
| 9 Sept. | Partly cloudy | 23° /12° | 2.5 mm | 6 | |
| 10 Sept. | Patchy rain possible | 23° /11° | 2 mm | 6 | |
| 11 Sept. | Partly cloudy | 23° /11° | 4.5 mm | 6 | |
| 12 Sept. | Partly cloudy | 23° /9° | 0.6 mm | 6 | |
| 13 Sept. | Partly cloudy | 21° /11° | 2.6 mm | 5 | |
| 14 Sept. | Overcast | 20° /11° | 8.7 mm | 5 | |
| 15 Sept. | Moderate rain at times | 22° /11° | 8.7 mm | 5 | |
| 16 Sept. | Moderate or heavy rain shower | 20° /11° | 6.6 mm | 5 | |
| 17 Sept. | Overcast | 18° /10° | 0.1 mm | 5 | |
| 18 Sept. | Overcast | 19° /9° | 5.9 mm | 5 | |
| 19 Sept. | Patchy rain possible | 18° /7° | 6.8 mm | 4 | |
| 20 Sept. | Moderate rain at times | 19° /7° | 1.9 mm | 5 | |
| 21 Sept. | Partly cloudy | 21° /8° | 2.3 mm | 5 | |
| 22 Sept. | Cloudy | 19° /7° | 4.5 mm | 5 | |
| 23 Sept. | Sunny | 19° /7° | 9.6 mm | 5 | |
| 24 Sept. | Sunny | 20° /7° | 4.3 mm | 5 | |
| 25 Sept. | Partly cloudy | 20° /7° | 4.3 mm | 5 | |
| 26 Sept. | Heavy rain at times | 18° /9° | 14.2 mm | 4 | |
| 27 Sept. | Cloudy | 18° /8° | 5.2 mm | 4 | |
| 28 Sept. | Patchy rain possible | 17° /8° | 12.4 mm | 4 | |
| 29 Sept. | Moderate or heavy rain shower | 17° /8° | 5 mm | 4 | |
| 30 Sept. | Sunny | 17° /7° | 1.4 mm | 5 | |
| 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.
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.
What to pack to Geneva in September?
As you prepare for your trip to Geneva 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 Geneva, 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 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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