Winterthur
September
Weather in Winterthur for September 2026
Your guide to Winterthur weather in September - trends and predictions
Until now, September 2026 in Winterthur is slightly cooler than the historical average by 0.6 °C.
Expect cooler weather in the next days in Winterthur with the forecast suggesting a temperature of 20.9 °C, lower than the historical average.
In general, the average temperature in Winterthur at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °C by the end of September.
The climate of Winterthur in September is notably wet, with an average of 12 rainy days, and a total of 98.9 mm of precipitation.
Temperatures
Rain 🌧️
18
Dry days
12
Rainy days
0
Snow days
20°/10°
Temperatures
10 km/h
Avg max wind
81 %
Avg humidity
Winterthur Weather September
Move between months or click on a day
Temperatures trend during September in Winterthur
See the weather trend as well as the moving average line
September weather in Winterthur day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 24° /12° | 1.3 mm | 6 | |
| 2 Sept. |  Sunny | 24° /12° | 1.5 mm | 5 | |
| 3 Sept. |  Mist | 25° /12° | 2.9 mm | 6 | |
| 4 Sept. | Fog | 25° /13° | 5.9 mm | 6 | |
| 5 Sept. | Mist | 22° /12° | 3.6 mm | 4 | |
| 6 Sept. | Fog | 23° /10° | 0 mm | 6 | |
| 7 Sept. | Fog | 27° /12° | 0 mm | 5 | |
| 8 Sept. | Fog | 26° /14° | 3.4 mm | 5 | |
| 9 Sept. |  Light rain shower | 20° /12° | 7.6 mm | 4 | |
| 10 Sept. | Mist | 20° /10° | 1.2 mm | 4 | |
| 11 Sept. | Partly cloudy | 21° /10° | 3.4 mm | 5 | |
| 12 Sept. |  Thundery outbreaks possible | 19° /9° | 1.7 mm | 4 | |
| 13 Sept. |  Overcast | 22° /12° | 0.1 mm | 5.1 | |
| 14 Sept. | Sunny | 22° /14° | 1 mm | 5.3 | |
| 15 Sept. | Sunny | 23° /13° | 0 mm | 5.3 | |
| 16 Sept. | Light rain shower | 21° /12° | 4.1 mm | 4.8 | |
| 17 Sept. | Sunny | 19° /11° | 12 mm | 5 | |
| 18 Sept. | Overcast | 17° /11° | 0 mm | 5 | |
| 19 Sept. | Sunny | 20° /10° | 0 mm | 5 | |
| 20 Sept. | Sunny | 21° /12° | 0 mm | 6 | |
| 21 Sept. | Sunny | 22° /11° | 0 mm | 6 | |
| 22 Sept. | Sunny | 20° /13° | 0 mm | 5 | |
| 23 Sept. | Sunny | 21° /10° | 0 mm | 6 | |
| 24 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 25 Sept. | Sunny | 25° /14° | 0 mm | 6 | |
| 26 Sept. | Overcast | 18° /10° | 2 mm | 4 | |
| 27 Sept. | Sunny | 18° /7° | 2.2 mm | 5 | |
| 28 Sept. | Overcast | 16° /7° | 2.9 mm | 3 | |
| 29 Sept. | Fog | 19° /7° | 0.1 mm | 5 | |
| 30 Sept. | Patchy rain possible | 19° /7° | 0.3 mm | 4 | |
| Next | |||||
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.
Change Month
Winterthur in September - FAQ
What are the expected maximum and minimum temperatures in Winterthur during September?
Enjoy moderate daytime temperatures of up to 20° 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 98.9 mm spread over approximately 12 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 💧
Typically, Winterthur has 12 rainy days in September with a total of 98.9 mm of rainfall.
UV exposure in Winterthur during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Winterthur weather pages
You are here
Where is Winterthur?Get accurate weather forecasts for Winterthur, located at latitude 47.506 and longitude 8.724. Stay updated with localized weather information tailored for Winterthur.
Found a mistake?
We appreciate your attention to details. Tell us here.