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 sees moderate rainfall in September, averaging 6 rainy days.
Is September a good time to visit Winterthur? check out the best time to travel to Winterthur page.
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24
Dry days
6
Rainy days
0
Snow days
24°/11°
Temperatures
8 km/h
Avg max wind
78 %
Avg humidity
Winterthur in September average weather
Move between months or click on a day
| 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 24° and cooler nights around 11°. 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 52.9 mm spread over approximately 6 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 8 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Winterthur in September?
As you prepare for your trip to Winterthur 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 Winterthur, 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 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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