Finistère (Brest)
September
Weather in Finistère for September 2025
Your guide to Finistère weather in September - trends and predictions
In general, the average temperature in Finistère at the beginning of September is 22 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.1 °C by the end of September.
Expect significant rainfall in Finistère during September, with an average of 17 rainy days.
Is September a good time to visit Finistère? check out the best time to travel to Finistère page.
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13
Dry days
17
Rainy days
0
Snow days
21°/14°
Temperatures
23 km/h
Avg max wind
78 %
Avg humidity
Finistère in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  20° | 2  19° | 3  22° | 4 24° | 5 22° | 6  24° | 7 23° |
| 8 22° | 9 21° | 10 20° | 11 19° | 12  17° | 13 18° | 14 19° |
| 15 21° | 16 21° | 17 20° | 18 19° | 19 20° | 20 19° | 21  18° |
| 22 18° | 23 15° | 24 18° | 25 18° | 26 17° | 27  16° | 28 17° |
| 29 17° | 30 17° |
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Temperatures trend during September in Finistère
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. | Light rain shower | 20° /14° | 6.4 mm | 5 | |
| 2 Sept. | Cloudy | 19° /12° | 0.9 mm | 5 | |
| 3 Sept. | Sunny | 22° /13° | 0.2 mm | 6 | |
| 4 Sept. | Sunny | 24° /16° | 0.4 mm | 6 | |
| 5 Sept. | Patchy rain possible | 22° /14° | 1.2 mm | 5 | |
| 6 Sept. | Partly cloudy | 24° /13° | 0.4 mm | 6 | |
| 7 Sept. | Partly cloudy | 23° /15° | 14.2 mm | 6 | |
| 8 Sept. | Patchy rain possible | 22° /16° | 15.4 mm | 5 | |
| 9 Sept. | Patchy rain possible | 21° /14° | 1.4 mm | 5 | |
| 10 Sept. | Patchy rain possible | 20° /14° | 1.4 mm | 5 | |
| 11 Sept. | Cloudy | 19° /12° | 0.7 mm | 4 | |
| 12 Sept. | Mist | 17° /12° | 0.6 mm | 4 | |
| 13 Sept. | Mist | 18° /11° | 0 mm | 5 | |
| 14 Sept. | Sunny | 19° /9° | 0 mm | 6 | |
| 15 Sept. | Partly cloudy | 21° /10° | 0 mm | 6 | |
| 16 Sept. | Light rain shower | 21° /13° | 1.3 mm | 5 | |
| 17 Sept. | Light rain shower | 20° /13° | 4.1 mm | 5 | |
| 18 Sept. | Patchy rain possible | 19° /14° | 0.8 mm | 5 | |
| 19 Sept. | Patchy rain possible | 20° /15° | 0.2 mm | 5 | |
| 20 Sept. | Light rain shower | 19° /14° | 17.5 mm | 5 | |
| 21 Sept. | Moderate or heavy rain shower | 18° /12° | 6.2 mm | 5 | |
| 22 Sept. | Light rain shower | 18° /11° | 1.6 mm | 4 | |
| 23 Sept. | Patchy rain possible | 15° /11° | 8.5 mm | 4 | |
| 24 Sept. | Patchy rain possible | 18° /14° | 0.6 mm | 4 | |
| 25 Sept. | Patchy rain possible | 18° /13° | 3.7 mm | 4 | |
| 26 Sept. | Patchy rain possible | 17° /13° | 5.4 mm | 4 | |
| 27 Sept. | Patchy light drizzle | 16° /12° | 3.5 mm | 4 | |
| 28 Sept. | Patchy rain possible | 17° /10° | 0.3 mm | 4 | |
| 29 Sept. | Sunny | 17° /10° | 2 mm | 5 | |
| 30 Sept. | Sunny | 17° /10° | 0.4 mm | 5 | |
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Important Notice
Our weather forecast for Finistère 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 Finistère forecast closer to your planned date for the most up-to-date weather information.
Finistère in September - FAQ
What are the expected maximum and minimum temperatures in Finistère during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Finistère during September?
Moderate rainfall is anticipated in Finistère during September, with a total of 87.8 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Finistère during September?
The average wind speed in Finistère during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Finistère in September?
As you prepare for your trip to Finistère 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 Finistère, 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 Finistère
Explore the daily rainfall trends and prepare for Finistères September weather 💧
UV exposure in Finistère during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Finistère?Get accurate weather forecasts for Finistère, located at latitude 48.39 and longitude -4.486. Stay updated with localized weather information tailored for Finistère.
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