Winterthur
September
Weather in Winterthur for September 2025
Your guide to Winterthur weather in September - trends and predictions
In general, the average temperature in Winterthur at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.4 °C by the end of September.
Winterthur in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 97.1 mm.
Temperatures
Rain 🌧️
11
Dry days
19
Rainy days
0
Snow days
21°/10°
Temperatures
10 km/h
Avg max wind
81 %
Avg humidity
Winterthur in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  26° | 3  26° | 4 25° | 5 25° | 6 25° | 7 27° |
| 8 27° | 9 22° | 10 24° | 11 22° | 12  21° | 13 15° | 14 14° |
| 15 20° | 16  20° | 17  20° | 18 20° | 19 18° | 20 23° | 21 23° |
| 22  19° | 23 18° | 24 18° | 25 19° | 26 17° | 27 19° | 28 17° |
| 29 20° | 30 19° |
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Temperatures trend during September in Winterthur
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. | Partly cloudy | 27° /13° | 0.6 mm | 6 | |
| 2 Sept. | Sunny | 26° /13° | 0.3 mm | 7 | |
| 3 Sept. | Mist | 26° /14° | 5.8 mm | 6 | |
| 4 Sept. | Fog | 25° /13° | 4.4 mm | 6 | |
| 5 Sept. | Mist | 25° /12° | 1.2 mm | 6 | |
| 6 Sept. | Fog | 25° /12° | 0 mm | 6 | |
| 7 Sept. | Fog | 27° /12° | 0 mm | 6 | |
| 8 Sept. | Fog | 27° /14° | 5 mm | 6 | |
| 9 Sept. | Mist | 22° /14° | 8.4 mm | 5 | |
| 10 Sept. | Mist | 24° /12° | 0.2 mm | 5 | |
| 11 Sept. | Partly cloudy | 22° /12° | 6.5 mm | 6 | |
| 12 Sept. | Thundery outbreaks possible | 21° /10° | 2.5 mm | 5 | |
| 13 Sept. | Fog | 15° /8° | 6.1 mm | 4 | |
| 14 Sept. | Fog | 14° /9° | 2 mm | 4 | |
| 15 Sept. | Fog | 20° /6° | 0 mm | 5 | |
| 16 Sept. | Patchy rain possible | 20° /7° | 1 mm | 5 | |
| 17 Sept. | Overcast | 20° /9° | 2.2 mm | 5 | |
| 18 Sept. | Light rain shower | 20° /8° | 7.2 mm | 5 | |
| 19 Sept. | Light rain shower | 18° /10° | 1 mm | 5 | |
| 20 Sept. | Patchy rain possible | 23° /8° | 0 mm | 5 | |
| 21 Sept. | Partly cloudy | 23° /10° | 1.6 mm | 6 | |
| 22 Sept. | Light rain | 19° /9° | 15.3 mm | 5 | |
| 23 Sept. | Patchy rain possible | 18° /9° | 4.5 mm | 4 | |
| 24 Sept. | Sunny | 18° /7° | 0.1 mm | 5 | |
| 25 Sept. | Mist | 19° /6° | 0 mm | 4 | |
| 26 Sept. | Mist | 17° /8° | 13.5 mm | 4 | |
| 27 Sept. | Sunny | 19° /7° | 3 mm | 5 | |
| 28 Sept. | Overcast | 17° /8° | 4.3 mm | 4 | |
| 29 Sept. | Partly cloudy | 20° /7° | 0 mm | 5 | |
| 30 Sept. | Mist | 19° /8° | 0.5 mm | 5 | |
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Important Notice
Our weather forecast for Winterthur 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 Winterthur forecast closer to your planned date for the most up-to-date weather information.
Winterthur in September - FAQ
What are the expected maximum and minimum temperatures in Winterthur 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 Winterthur during September?
Moderate rainfall is anticipated in Winterthur during September, with a total of 97.1 mm spread over approximately 19 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Winterthur during September?
The average wind speed in Winterthur during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Winterthur
Explore the daily rainfall trends and prepare for Winterthurs September weather 💧
UV exposure in Winterthur during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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