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Côtes-d'Armor (Dinan)
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Weather in Côtes-d'Armor for September 2025

Your guide to Côtes-d'Armor weather in September - trends and predictions

    Temperatures

  • So far, September 2025 in Côtes-d'Armor is slightly warmer than the historical average by 0.9 °C.

  • The forecast for the upcoming days in Côtes-d'Armor predicts a temperature of 21.1 °C, which is slightly above the historical average.

  • In general, the average temperature in Côtes-d'Armor at the beginning of September is 20.4 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 18.1 °C by the end of September.

    • Rain 🌧️

  • Côtes-d'Armor in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 128.1 mm.

    • More

  • Is September a good time to visit Côtes-d'Armor? check out the best time to travel to Côtes-d'Armor page.

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

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/12°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Côtes-d'Armor Weather September

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

Temperatures trend during September in Côtes-d'Armor

See the weather trend as well as the moving average line

September weather in Côtes-d'Armor day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /14° 9.3 mm 5
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /13° 11.8 mm 5
3 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 1.7 mm 5
4 Sept. Moderate rain at times
Moderate rain at times
 19° /13° 1.2 mm 4
5 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.8 mm 5
6 Sept. Patchy rain possible
Patchy rain possible
 23° /13° 0.6 mm 5
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /13° 8.2 mm 5
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /11° 6.5 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 2.4 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 3 mm 4
11 Sept. Patchy rain possible
Patchy rain possible
 18° /11° 2.3 mm 4
12 Sept. Moderate rain at times
Moderate rain at times
 17° /10° 1.6 mm 4
13 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 3.5 mm 0.8
14 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 1.1 mm 0.7
15 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 0.1 mm 0.8
16 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.2 mm 0.7
17 Sept. Cloudy
Cloudy
 23° /14° 0.1 mm 0.6
18 Sept. Partly cloudy
Partly cloudy
 25° /17° 0.1 mm 6
19 Sept. Patchy rain possible
Patchy rain possible
 21° /14° 0.6 mm 4
20 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 0.1 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.1 mm 4
22 Sept. Sunny
Sunny
 18° /11° 0 mm 4
23 Sept. Sunny
Sunny
 21° /11° 0 mm 5
24 Sept. Sunny
Sunny
 28° /12° 0 mm 5
25 Sept. Sunny
Sunny
 24° /14° 0 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 16° /14° 2.4 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 1.4 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 2.2 mm 3
29 Sept. Overcast
Overcast
 15° /9° 0.4 mm 4
30 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 0.6 mm 4
Next
Important Notice
Our weather forecast for Côtes-d'Armor 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 Côtes-d'Armor forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Côtes-d'Armor weather in September vs August vs October

Compare September weather in Côtes-d'Armor 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
Temperatures25°/14°19°/12°16°/10°
Rainfall111 mm128 mm99 mm
Wind22 km/h26 km/h21.3 km/h
Humidity71%76%81%
Rainy days3 days20 days19 days
Dry days28 days10 days12 days

Planning a trip to Côtes-d'Armor? Discover the best time to visit

Côtes-d'Armor in September - FAQ

What are the expected maximum and minimum temperatures in Côtes-d'Armor during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Côtes-d'Armor during September?
Significant rainfall exceeding 128.1 mm is expected in Côtes-d'Armor during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Côtes-d'Armor during September?
The average wind speed in Côtes-d'Armor during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Côtes-d'Armor in September?

As you prepare for your trip to Côtes-d'Armor 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 Côtes-d'Armor, 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 Côtes-d'Armor

Explore the daily rainfall trends and prepare for Côtes-d'Armors September weather 💧

UV exposure in Côtes-d'Armor during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Côtes-d'Armor?

Get accurate weather forecasts for Côtes-d'Armor, located at latitude 48.456 and longitude -2.05. Stay updated with localized weather information tailored for Côtes-d'Armor.

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