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Finistère (Brest)
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Weather in Finistère for September 2025

Your guide to Finistère weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Finistère is cooler than usual, with temperatures averaging 17.9 °C, this is -2.8 °C below the typical seasonal average.

  • The forecast for the next days in Finistère predicts a temperature of 16.6 °C, which is cooler than the historical average.

  • 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 16.3 °C by the end of September.

    • Rain 🌧️

  • Finistère experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 86.2 mm.

    • More

  • Is September a good time to visit Finistère? check out the best time to travel to Finistère page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/13°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Finistère Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
21°
2
Partly cloudy
20°
3
Sunny
22°
4
Moderate rain at times
22°
5
Patchy rain possible
22°
6
Sunny
24°
7
Patchy rain possible
23°
8
Patchy rain possible
20°
9
Patchy rain possible
20°
10
Patchy rain possible
19°
11
Patchy rain possible
20°
12
Patchy rain possible
19°
13
Patchy rain possible
20°
14
Sunny
20°
15
Patchy rain possible
19°
16
Patchy rain possible
19°
17
Patchy rain possible
18°
18
Patchy rain possible
20°
19
Sunny
21°
20
Moderate rain
16°
21
Patchy rain possible
14°
22
Patchy rain possible
14°
23
Partly cloudy
15°
24
Partly cloudy
16°
25
Patchy rain possible
16°
26
Patchy rain possible
15°
27
Patchy rain possible
16°
28
Partly cloudy
16°
29
Partly cloudy
16°
30
Overcast
19°

Temperatures trend during September in Finistère

See the weather trend as well as the moving average line

September weather in Finistère day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 21° /14° 6.6 mm 5
2 Sept. Partly cloudy
Partly cloudy
 20° /13° 2.6 mm 5
3 Sept. Sunny
Sunny
 22° /13° 2.5 mm 5
4 Sept. Moderate rain at times
Moderate rain at times
 22° /15° 4.4 mm 5
5 Sept. Patchy rain possible
Patchy rain possible
 22° /14° 2.2 mm 5
6 Sept. Sunny
Sunny
 24° /14° 0.9 mm 5
7 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 7.6 mm 5
8 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 7.5 mm 4
9 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 2.6 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 1.4 mm 4
11 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 1.5 mm 4
12 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 1.4 mm 4
13 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 3.1 mm 5
14 Sept. Sunny
Sunny
 20° /12° 3.1 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.1 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.7 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 0.2 mm 1.2
18 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 0.3 mm 1.1
19 Sept. Sunny
Sunny
 21° /14° 0 mm 1.1
20 Sept. Moderate rain
Moderate rain
 16° /14° 6 mm 0.7
21 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 3.1 mm 0.6
22 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 0.7 mm 3
23 Sept. Partly cloudy
Partly cloudy
 15° /11° 0 mm 4
24 Sept. Partly cloudy
Partly cloudy
 16° /11° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.1 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0.4 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 0.1 mm 3
28 Sept. Partly cloudy
Partly cloudy
 16° /10° 0 mm 4
29 Sept. Partly cloudy
Partly cloudy
 16° /10° 0 mm 4
30 Sept. Overcast
Overcast
 19° /14° 0 mm 4
Next
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.
Change Month
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Finistère weather in September vs August vs October

Compare September weather in Finistère with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures21°/14°19°/13°17°/11°
Rainfall55 mm86 mm104 mm
Wind22.7 km/h23.4 km/h26.5 km/h
Humidity78%77%81%
Rainy days20 days22 days25 days
Dry days11 days8 days6 days

Planning a trip to Finistère? Discover the best time to visit

Finistère in September - FAQ

What are the expected maximum and minimum temperatures in Finistère during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 13°. 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 86.2 mm spread over approximately 22 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
    • 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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Location coordinates 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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