Weather in Brittany for September 2025
In general, the average temperature in Brittany at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.
Brittany sees moderate rainfall in September, averaging 10 rainy days.
Is September a good time to visit Brittany? check out the best time to travel to Brittany page.
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Brittany in September average weather
Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
---|---|---|---|---|---|---|
1 24° | 2 24° | 3 27° | 4 27° | 5 27° | 6 27° | 7 25° |
8 26° | 9 27° | 10 26° | 11 22° | 12 20° | 13 22° | 14 22° |
15 25° | 16 25° | 17 25° | 18 24° | 19 23° | 20 24° | 21 17° |
22 20° | 23 18° | 24 20° | 25 20° | 26 22° | 27 19° | 28 19° |
29 18° | 30 20° |
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Temperatures trend during September in Brittany
September weather day by day
Date | Weather | Temperatures | Rain | UV | More |
---|---|---|---|---|---|
1 Sept. | Moderate or heavy rain shower | 24° /16° | 7.4 mm | 6 | |
2 Sept. | Mist | 24° /12° | 0.5 mm | 6 | |
3 Sept. | Sunny | 27° /13° | 0.6 mm | 7 | |
4 Sept. | Sunny | 27° /15° | 0.9 mm | 7 | |
5 Sept. | Partly cloudy | 27° /15° | 1.5 mm | 7 | |
6 Sept. | Patchy rain possible | 27° /14° | 0.5 mm | 6 | |
7 Sept. | Sunny | 25° /15° | 9.1 mm | 7 | |
8 Sept. | Partly cloudy | 26° /15° | 7.1 mm | 6 | |
9 Sept. | Partly cloudy | 27° /15° | 0 mm | 7 | |
10 Sept. | Thundery outbreaks possible | 26° /13° | 0.6 mm | 6 | |
11 Sept. | Patchy rain possible | 22° /11° | 1.1 mm | 5 | |
12 Sept. | Fog | 20° /11° | 1.1 mm | 5 | |
13 Sept. | Overcast | 22° /10° | 0 mm | 6 | |
14 Sept. | Mist | 22° /8° | 0 mm | 6 | |
15 Sept. | Partly cloudy | 25° /10° | 0 mm | 7 | |
16 Sept. | Overcast | 25° /12° | 0.3 mm | 6 | |
17 Sept. | Light drizzle | 25° /13° | 1.4 mm | 6 | |
18 Sept. | Light rain shower | 24° /12° | 2.2 mm | 6 | |
19 Sept. | Overcast | 23° /12° | 0 mm | 6 | |
20 Sept. | Light drizzle | 24° /13° | 3.8 mm | 5 | |
21 Sept. | Light rain shower | 17° /11° | 8.3 mm | 4 | |
22 Sept. | Patchy rain possible | 20° /10° | 3.2 mm | 5 | |
23 Sept. | Overcast | 18° /9° | 4.3 mm | 4 | |
24 Sept. | Sunny | 20° /10° | 1.2 mm | 5 | |
25 Sept. | Patchy rain possible | 20° /11° | 6.7 mm | 5 | |
26 Sept. | Patchy rain possible | 22° /13° | 1.7 mm | 5 | |
27 Sept. | Overcast | 19° /10° | 1.3 mm | 4 | |
28 Sept. | Mist | 19° /9° | 0.8 mm | 5 | |
29 Sept. | Patchy rain possible | 18° /9° | 0.4 mm | 4 | |
30 Sept. | Sunny | 20° /10° | 0.3 mm | 5 | |
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Brittany in September - FAQ
What to pack to Brittany in September?
As you prepare for your trip to Brittany 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 Brittany, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- 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
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Brittany
UV exposure in Brittany during September
Quick links
Get accurate weather forecasts for Brittany, located at latitude 48.112 and longitude -1.674. Stay updated with localized weather information tailored for Brittany.