Weather in Genève for September 2026
Until now, September 2026 in Genève has been nearly identical to the historical average, with a temperature of 24.1 °C (showing only a slight deviation of 0.4 °C).
Expect cooler weather in the next days in Genève with the forecast suggesting a temperature of 21.3 °C, lower than the historical average.
In general, the average temperature in Genève at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.1 °C by the end of September.
The climate of Genève in September is notably wet, with an average of 13 rainy days, and a total of 159.9 mm of precipitation.
Temperatures
Rain 🌧️
Genève Weather September
Temperatures trend during September in Genève
September weather in Genève day by day
| 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 | 20° /12° | 0 mm | 5.1 | |
| 19 Sept. | Sunny | 22° /11° | 0 mm | 5.4 | |
| 20 Sept. | Overcast | 24° /14° | 0 mm | 5.3 | |
| 21 Sept. | Overcast | 23° /13° | 0 mm | 5.1 | |
| 22 Sept. | Sunny | 21° /11° | 0 mm | 6 | |
| 23 Sept. | Sunny | 20° /9° | 0 mm | 5 | |
| 24 Sept. | Sunny | 24° /13° | 0 mm | 6 | |
| 25 Sept. | Sunny | 21° /12° | 0 mm | 6 | |
| 26 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 27 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 28 Sept. | Sunny | 25° /13° | 0 mm | 6 | |
| 29 Sept. | Overcast | 23° /16° | 1 mm | 5 | |
| 30 Sept. | Light rain shower | 18° /13° | 35.1 mm | 3 | |
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Guide for Genève in September
In September, the weather in Genève, Switzerland, experiences a transition from the lingering warmth of summer to the crispness of early autumn. At the beginning of the month, the average temperature hovers around 18°, with pleasant, mild days and cooler evenings.
The city is often still basked in the remnants of summer, making it an ideal time to explore the charming streets and picturesque lakeside.
As the month progresses, the temperatures gradually begin to drop, with the average temperature decreasing to around 15° by the end of September. The weather becomes crisper, and the cityscape starts to showcase the beautiful autumnal colors.
Visitors can enjoy the changing scenery and take part in outdoor activities such as hiking or cycling in the surrounding countryside.
Overall, September in Genève offers a delightful blend of late summer warmth and early autumnal charm, making it an excellent time to visit for those who enjoy milder weather and wish to experience the city during a quieter period.
Genève in September - FAQ
What are the expected maximum and minimum temperatures in Genève during September?
How much rainfall should be expected in Genève during September?
What are the typical wind conditions in Genève during September?
September rainfall patterns in Genève
UV exposure in Genève during September
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