Weather in Sankt Gallen for September 2025
In general, the average temperature in Sankt 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.
Sankt Gallen experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 127 mm.
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Sankt Gallen in September average weather
| 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 Sankt Gallen
September weather day by day
| 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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Sankt Gallen in September - FAQ
What to pack to Sankt Gallen in September?
As you prepare for your trip to Sankt 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 Sankt 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 Sankt Gallen
UV exposure in Sankt Gallen during September
Quick links
Where is Sankt Gallen?Get accurate weather forecasts for Sankt Gallen, located at latitude 47.424 and longitude 9.375. Stay updated with localized weather information tailored for Sankt Gallen.