Weather in Zürich for September 2025
In general, the average temperature in Zürich at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.
Zürich experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 85.6 mm.
Temperatures
Rain 🌧️
Zürich in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  25° | 3 26° | 4  25° | 5  25° | 6 26° | 7  27° |
| 8 25° | 9 23° | 10  23° | 11 22° | 12 22° | 13 20° | 14  19° |
| 15  21° | 16 19° | 17 18° | 18 19° | 19 17° | 20 19° | 21 20° |
| 22 18° | 23 19° | 24 19° | 25 20° | 26 18° | 27 18° | 28 16° |
| 29 17° | 30 17° |
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Temperatures trend during September in Zürich
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 25° /11° | 0.4 mm | 6 | |
| 2 Sept. | Partly cloudy | 25° /10° | 0.5 mm | 7 | |
| 3 Sept. | Overcast | 26° /12° | 2.7 mm | 6 | |
| 4 Sept. | Heavy rain at times | 25° /12° | 2.2 mm | 6 | |
| 5 Sept. | Patchy rain possible | 25° /12° | 0.5 mm | 6 | |
| 6 Sept. | Patchy rain possible | 26° /12° | 0.7 mm | 6 | |
| 7 Sept. | Sunny | 27° /12° | 0.1 mm | 6 | |
| 8 Sept. | Partly cloudy | 25° /13° | 6.3 mm | 6 | |
| 9 Sept. | Patchy rain possible | 23° /13° | 4.2 mm | 6 | |
| 10 Sept. | Moderate or heavy rain shower | 23° /12° | 2.9 mm | 5 | |
| 11 Sept. | Patchy rain possible | 22° /11° | 3.7 mm | 6 | |
| 12 Sept. | Patchy rain possible | 22° /9° | 0.9 mm | 5 | |
| 13 Sept. | Overcast | 20° /10° | 2.7 mm | 5 | |
| 14 Sept. | Cloudy | 19° /11° | 3.4 mm | 4 | |
| 15 Sept. | Fog | 21° /10° | 4.7 mm | 5 | |
| 16 Sept. | Heavy rain at times | 19° /10° | 3 mm | 5 | |
| 17 Sept. | Overcast | 18° /9° | 2.7 mm | 4 | |
| 18 Sept. | Overcast | 19° /8° | 2.9 mm | 4 | |
| 19 Sept. | Patchy rain possible | 17° /8° | 3.4 mm | 4 | |
| 20 Sept. | Patchy rain possible | 19° /7° | 0.4 mm | 5 | |
| 21 Sept. | Partly cloudy | 20° /8° | 0.4 mm | 5 | |
| 22 Sept. | Partly cloudy | 18° /6° | 5.1 mm | 5 | |
| 23 Sept. | Partly cloudy | 19° /8° | 2 mm | 5 | |
| 24 Sept. | Sunny | 19° /7° | 1.8 mm | 5 | |
| 25 Sept. | Mist | 20° /7° | 0.3 mm | 5 | |
| 26 Sept. | Patchy rain possible | 18° /9° | 10 mm | 5 | |
| 27 Sept. | Cloudy | 18° /8° | 4.9 mm | 5 | |
| 28 Sept. | Patchy rain possible | 16° /8° | 8.7 mm | 4 | |
| 29 Sept. | Patchy rain possible | 17° /8° | 3.5 mm | 4 | |
| 30 Sept. | Overcast | 17° /7° | 0.5 mm | 4 | |
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Guide for Zürich in September
In September, Zürich, Switzerland experiences a transition from the lingering warmth of summer to the crispness of early autumn. At the beginning of the month, Zürich typically enjoys mild and pleasant weather with average temperatures around 18° during the day and 10° at night.
The city experiences a mix of sunny days and occasional light showers, making it an ideal time to explore the picturesque streets and scenic lakeside promenades.
As the month progresses, the weather in Zürich gradually cools down, with average daytime temperatures dropping to around 16° and nighttime temperatures decreasing to 8°. Visitors can expect a higher chance of rainfall towards the end of September, as the city transitions into the autumn season.
The changing foliage in the surrounding countryside adds a beautiful backdrop to the city, making it a great time for nature walks and outdoor activities.
Overall, September in Zürich offers a delightful blend of late summer warmth and early autumnal charm, providing visitors with the opportunity to experience the city's cultural attractions and natural beauty in comfortable weather conditions.
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Zürich in September - FAQ
September rainfall patterns in Zürich
UV exposure in Zürich during September
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