Biel/Bienne
September
Weather in Biel/Bienne for September 2025
Your guide to Biel/Bienne weather in September - trends and predictions
In general, the average temperature in Biel/Bienne at the beginning of September is 25.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.1 °C by the end of September.
Biel/Bienne sees moderate rainfall in September, averaging 7 rainy days.
Is September a good time to visit Biel/Bienne? check out the best time to travel to Biel/Bienne page.
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23
Dry days
7
Rainy days
0
Snow days
24°/11°
Temperatures
8 km/h
Avg max wind
73 %
Avg humidity
Biel/Bienne in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  26° | 3 25° | 4  24° | 5 25° | 6 26° | 7 28° |
| 8 26° | 9 21° | 10 25° | 11 22° | 12  21° | 13 14° | 14  15° |
| 15 20° | 16  20° | 17 18° | 18  16° | 19 18° | 20 22° | 21 22° |
| 22  19° | 23  14° | 24 17° | 25 19° | 26 18° | 27  19° | 28 16° |
| 29 19° | 30 19° |
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Temperatures trend during September in Biel/Bienne
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 | 26° /13° | 5.6 mm | 6 | |
| 2 Sept. | Sunny | 26° /12° | 2.4 mm | 7 | |
| 3 Sept. | Partly cloudy | 25° /14° | 5.4 mm | 6 | |
| 4 Sept. | Mist | 24° /14° | 1.9 mm | 6 | |
| 5 Sept. | Sunny | 25° /13° | 2.5 mm | 6 | |
| 6 Sept. | Sunny | 26° /12° | 0 mm | 6 | |
| 7 Sept. | Sunny | 28° /12° | 0 mm | 7 | |
| 8 Sept. | Sunny | 26° /14° | 3.1 mm | 6 | |
| 9 Sept. | Sunny | 21° /11° | 4.7 mm | 5 | |
| 10 Sept. | Sunny | 25° /11° | 0.2 mm | 6 | |
| 11 Sept. | Partly cloudy | 22° /11° | 9.6 mm | 5 | |
| 12 Sept. | Thundery outbreaks possible | 21° /10° | 2.2 mm | 5 | |
| 13 Sept. | Mist | 14° /8° | 2.9 mm | 4 | |
| 14 Sept. | Moderate rain | 15° /7° | 3.8 mm | 4 | |
| 15 Sept. | Mist | 20° /7° | 0 mm | 5 | |
| 16 Sept. | Light rain shower | 20° /8° | 0.7 mm | 5 | |
| 17 Sept. | Partly cloudy | 18° /8° | 0.3 mm | 5 | |
| 18 Sept. | Moderate or heavy rain shower | 16° /7° | 8.1 mm | 4 | |
| 19 Sept. | Patchy rain possible | 18° /8° | 0.7 mm | 5 | |
| 20 Sept. | Partly cloudy | 22° /7° | 0.1 mm | 6 | |
| 21 Sept. | Light rain shower | 22° /9° | 5.5 mm | 5 | |
| 22 Sept. | Patchy light rain with thunder | 19° /8° | 9 mm | 5 | |
| 23 Sept. | Patchy light drizzle | 14° /7° | 5.3 mm | 4 | |
| 24 Sept. | Sunny | 17° /5° | 0.1 mm | 5 | |
| 25 Sept. | Sunny | 19° /6° | 0.6 mm | 5 | |
| 26 Sept. | Sunny | 18° /7° | 31.5 mm | 5 | |
| 27 Sept. | Overcast | 19° /8° | 2.5 mm | 4 | |
| 28 Sept. | Overcast | 16° /5° | 2.8 mm | 4 | |
| 29 Sept. | Sunny | 19° /6° | 0 mm | 5 | |
| 30 Sept. | Sunny | 19° /8° | 0.6 mm | 5 | |
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Important Notice
Our weather forecast for Biel/Bienne 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 Biel/Bienne forecast closer to your planned date for the most up-to-date weather information.
Biel/Bienne in September - FAQ
What are the expected maximum and minimum temperatures in Biel/Bienne during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Biel/Bienne during September?
Moderate rainfall is anticipated in Biel/Bienne during September, with a total of 52.2 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Biel/Bienne during September?
The average wind speed in Biel/Bienne during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Biel/Bienne in September?
As you prepare for your trip to Biel/Bienne 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 Biel/Bienne, 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
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Where is Biel/Bienne?Get accurate weather forecasts for Biel/Bienne, located at latitude 47.137 and longitude 7.246. Stay updated with localized weather information tailored for Biel/Bienne.
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