Saint Gallen (Sankt Gallen)
September
Weather in Saint Gallen for September 2025
Your guide to Saint Gallen weather in September - trends and predictions
In general, the average temperature in Saint Gallen at the beginning of September is 22.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.1 °C by the end of September.
Saint Gallen experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 127 mm.
Is September a good time to visit Saint Gallen? check out the best time to travel to Saint Gallen page.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
18°/10°
Temperatures
9 km/h
Avg max wind
80 %
Avg humidity
Saint Gallen in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  23° | 3 23° | 4 22° | 5 23° | 6 22° | 7 23° |
| 8 23° | 9 20° | 10  21° | 11 21° | 12  17° | 13  13° | 14 12° |
| 15 17° | 16 17° | 17 18° | 18 18° | 19 17° | 20 19° | 21 20° |
| 22 16° | 23 15° | 24 16° | 25 16° | 26 16° | 27 16° | 28 14° |
| 29 18° | 30 17° |
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Temperatures trend during September in Saint Gallen
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 | 23° /13° | 0.7 mm | 6 | |
| 2 Sept. | Sunny | 23° /13° | 2.6 mm | 6 | |
| 3 Sept. | Sunny | 23° /13° | 3.9 mm | 6 | |
| 4 Sept. | Partly cloudy | 22° /13° | 2.3 mm | 6 | |
| 5 Sept. | Sunny | 23° /12° | 1.6 mm | 6 | |
| 6 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 7 Sept. | Sunny | 23° /12° | 0 mm | 6 | |
| 8 Sept. | Sunny | 23° /14° | 7.5 mm | 6 | |
| 9 Sept. | Partly cloudy | 20° /14° | 12.4 mm | 5 | |
| 10 Sept. | Patchy rain possible | 21° /13° | 1.3 mm | 5 | |
| 11 Sept. | Sunny | 21° /12° | 6.5 mm | 6 | |
| 12 Sept. | Thundery outbreaks possible | 17° /10° | 5.5 mm | 4 | |
| 13 Sept. | Mist | 13° /9° | 6.7 mm | 3 | |
| 14 Sept. | Mist | 12° /8° | 4.5 mm | 3 | |
| 15 Sept. | Mist | 17° /6° | 0 mm | 5 | |
| 16 Sept. | Partly cloudy | 17° /7° | 2 mm | 5 | |
| 17 Sept. | Sunny | 18° /10° | 3.4 mm | 5 | |
| 18 Sept. | Light rain shower | 18° /9° | 10.1 mm | 5 | |
| 19 Sept. | Light rain shower | 17° /10° | 2.9 mm | 4 | |
| 20 Sept. | Patchy rain possible | 19° /9° | 0.9 mm | 5 | |
| 21 Sept. | Partly cloudy | 20° /10° | 0.4 mm | 5 | |
| 22 Sept. | Light rain shower | 16° /9° | 15.9 mm | 4 | |
| 23 Sept. | Patchy rain possible | 15° /8° | 9.5 mm | 4 | |
| 24 Sept. | Sunny | 16° /7° | 1.4 mm | 5 | |
| 25 Sept. | Sunny | 16° /6° | 0 mm | 5 | |
| 26 Sept. | Sunny | 16° /9° | 5.4 mm | 4 | |
| 27 Sept. | Sunny | 16° /9° | 9 mm | 4 | |
| 28 Sept. | Partly cloudy | 14° /8° | 9.6 mm | 4 | |
| 29 Sept. | Sunny | 18° /8° | 0.4 mm | 5 | |
| 30 Sept. | Partly cloudy | 17° /9° | 0.6 mm | 5 | |
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Important Notice
Our weather forecast for Saint Gallen 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 Saint Gallen forecast closer to your planned date for the most up-to-date weather information.
Saint Gallen in September - FAQ
What are the expected maximum and minimum temperatures in Saint Gallen during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Saint Gallen during September?
Significant rainfall exceeding 127 mm is expected in Saint Gallen during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Saint Gallen during September?
The average wind speed in Saint Gallen during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Saint Gallen in September?
As you prepare for your trip to Saint Gallen 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 Saint Gallen, 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
- 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 Saint Gallen
Explore the daily rainfall trends and prepare for Saint Gallens September weather 💧
UV exposure in Saint Gallen during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Saint Gallen?Get accurate weather forecasts for Saint Gallen, located at latitude 47.424 and longitude 9.375. Stay updated with localized weather information tailored for Saint Gallen.
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