Weather in Basel-City for September 2025
In general, the average temperature in Basel-City at the beginning of September is 27.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °C by the end of September.
Basel-City sees moderate rainfall in September, averaging 6 rainy days.
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Basel-City in September average weather
Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
---|---|---|---|---|---|---|
1 28° | 2 28° | 3 27° | 4 26° | 5 26° | 6 26° | 7 29° |
8 27° | 9 25° | 10 26° | 11 24° | 12 22° | 13 17° | 14 17° |
15 21° | 16 19° | 17 22° | 18 20° | 19 20° | 20 24° | 21 24° |
22 20° | 23 16° | 24 20° | 25 21° | 26 20° | 27 20° | 28 19° |
29 21° | 30 21° |
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Temperatures trend during September in Basel-City
September weather day by day
Date | Weather | Temperatures | Rain | UV | More |
---|---|---|---|---|---|
1 Sept. | Cloudy | 28° /15° | 1.1 mm | 7 | |
2 Sept. | Sunny | 28° /15° | 0.5 mm | 7 | |
3 Sept. | Sunny | 27° /15° | 3.9 mm | 7 | |
4 Sept. | Overcast | 26° /14° | 1.9 mm | 6 | |
5 Sept. | Sunny | 26° /13° | 2.1 mm | 6 | |
6 Sept. | Sunny | 26° /12° | 0 mm | 6 | |
7 Sept. | Sunny | 29° /14° | 0 mm | 8 | |
8 Sept. | Sunny | 27° /15° | 1.5 mm | 7 | |
9 Sept. | Sunny | 25° /14° | 3.2 mm | 6 | |
10 Sept. | Sunny | 26° /13° | 0.1 mm | 6 | |
11 Sept. | Sunny | 24° /13° | 8.9 mm | 6 | |
12 Sept. | Thundery outbreaks possible | 22° /11° | 1.7 mm | 5 | |
13 Sept. | Mist | 17° /10° | 1.3 mm | 4 | |
14 Sept. | Fog | 17° /10° | 0.2 mm | 4 | |
15 Sept. | Partly cloudy | 21° /8° | 0 mm | 6 | |
16 Sept. | Light rain shower | 19° /10° | 1.3 mm | 5 | |
17 Sept. | Sunny | 22° /13° | 0.8 mm | 6 | |
18 Sept. | Light rain shower | 20° /11° | 4.4 mm | 5 | |
19 Sept. | Light drizzle | 20° /12° | 0.6 mm | 5 | |
20 Sept. | Sunny | 24° /10° | 0 mm | 6 | |
21 Sept. | Light rain | 24° /12° | 3 mm | 6 | |
22 Sept. | Patchy light rain with thunder | 20° /12° | 7.4 mm | 5 | |
23 Sept. | Patchy rain possible | 16° /10° | 3.8 mm | 4 | |
24 Sept. | Sunny | 20° /8° | 0.1 mm | 5 | |
25 Sept. | Sunny | 21° /7° | 0.3 mm | 6 | |
26 Sept. | Sunny | 20° /10° | 23.8 mm | 5 | |
27 Sept. | Overcast | 20° /9° | 2.2 mm | 5 | |
28 Sept. | Partly cloudy | 19° /9° | 3.9 mm | 5 | |
29 Sept. | Partly cloudy | 21° /8° | 0 mm | 6 | |
30 Sept. | Sunny | 21° /9° | 0.6 mm | 5 | |
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Basel-City in September - FAQ
What to pack to Basel-City in September?
As you prepare for your trip to Basel-City 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 Basel-City, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- 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
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Basel-City
UV exposure in Basel-City during September
Quick links
Get accurate weather forecasts for Basel-City, located at latitude 47.558 and longitude 7.573. Stay updated with localized weather information tailored for Basel-City.