Weather in Interlaken for September 2025
In general, the average temperature in Interlaken at the beginning of September is 19 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.7 °C by the end of September.
The climate of Interlaken in September is notably wet, with an average of 15 rainy days.
Is September a good time to visit Interlaken? check out the best time to travel to Interlaken page.
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Interlaken in September average weather
Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
---|---|---|---|---|---|---|
1 19° | 2 18° | 3 19° | 4 18° | 5 19° | 6 19° | 7 21° |
8 19° | 9 15° | 10 17° | 11 17° | 12 12° | 13 7° | 14 8° |
15 12° | 16 14° | 17 13° | 18 14° | 19 13° | 20 15° | 21 15° |
22 11° | 23 8° | 24 11° | 25 13° | 26 13° | 27 14° | 28 10° |
29 14° | 30 14° |
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Temperatures trend during September in Interlaken
September weather day by day
Date | Weather | Temperatures | Rain | UV | More |
---|---|---|---|---|---|
1 Sept. | Patchy rain possible | 19° /8° | 3.1 mm | 5 | |
2 Sept. | Patchy rain possible | 18° /8° | 5.7 mm | 4 | |
3 Sept. | Sunny | 19° /9° | 5.4 mm | 5 | |
4 Sept. | Overcast | 18° /9° | 5.2 mm | 5 | |
5 Sept. | Sunny | 19° /10° | 4.1 mm | 5 | |
6 Sept. | Sunny | 19° /9° | 0.5 mm | 5 | |
7 Sept. | Partly cloudy | 21° /10° | 0.1 mm | 6 | |
8 Sept. | Patchy rain possible | 19° /10° | 6.4 mm | 5 | |
9 Sept. | Patchy rain possible | 15° /9° | 10.1 mm | 4 | |
10 Sept. | Patchy rain possible | 17° /8° | 0.8 mm | 4 | |
11 Sept. | Moderate rain at times | 17° /8° | 5.3 mm | 4 | |
12 Sept. | Thundery outbreaks possible | 12° /5° | 7.6 mm | 3 | |
13 Sept. | Moderate or heavy rain shower | 7° /4° | 16.4 mm | 2 | |
14 Sept. | Thundery outbreaks possible | 8° /3° | 0.8 mm | 2 | |
15 Sept. | Partly cloudy | 12° /3° | 0 mm | 4 | |
16 Sept. | Light rain shower | 14° /4° | 2 mm | 3 | |
17 Sept. | Sunny | 13° /5° | 0.1 mm | 4 | |
18 Sept. | Light rain shower | 14° /5° | 6.5 mm | 4 | |
19 Sept. | Patchy rain possible | 13° /4° | 2.2 mm | 3 | |
20 Sept. | Patchy rain possible | 15° /5° | 1.4 mm | 4 | |
21 Sept. | Patchy rain possible | 15° /6° | 1.3 mm | 4 | |
22 Sept. | Light rain shower | 11° /4° | 13.3 mm | 3 | |
23 Sept. | Light rain shower | 8° /3° | 7.6 mm | 2 | |
24 Sept. | Sunny | 11° /2° | 1.6 mm | 3 | |
25 Sept. | Sunny | 13° /3° | 0.1 mm | 4 | |
26 Sept. | Sunny | 13° /6° | 11.3 mm | 4 | |
27 Sept. | Sunny | 14° /5° | 2.7 mm | 4 | |
28 Sept. | Sunny | 10° /4° | 6.7 mm | 3 | |
29 Sept. | Sunny | 14° /4° | 0.1 mm | 4 | |
30 Sept. | Patchy rain possible | 14° /6° | 1.8 mm | 4 | |
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Interlaken in September - FAQ
What to pack to Interlaken in September?
As you prepare for your trip to Interlaken 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 Interlaken, 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
Quick links
Get accurate weather forecasts for Interlaken, located at latitude 46.684 and longitude 7.866. Stay updated with localized weather information tailored for Interlaken.