Weather in Saint Gallen for September 2025
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 sees moderate rainfall in September, averaging 8 rainy days.
Is September a good time to visit Saint Gallen? check out the best time to travel to Saint Gallen page.
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Saint 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 Saint 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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Saint Gallen in September - FAQ
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
- 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 Saint Gallen
UV exposure in Saint Gallen during September
Quick links
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.