Côtes-d'Armor (Dinan)
September
Weather in Côtes-d'Armor for September 2026
Your guide to Côtes-d'Armor weather in September - trends and predictions
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 significantly cool down, reaching an average of 16.6 °C by the end of September.
Côtes-d'Armor in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 128.1 mm.
Is September a good time to visit Côtes-d'Armor? check out the best time to travel to Côtes-d'Armor page.
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Temperatures
Rain 🌧️
More
10
Dry days
20
Rainy days
0
Snow days
19°/12°
Temperatures
26 km/h
Avg max wind
76 %
Avg humidity
Côtes-d'Armor Weather September
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Temperatures trend during September in Côtes-d'Armor
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September weather in Côtes-d'Armor day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate or heavy rain shower | 21° /14° | 9.3 mm | 5 | |
| 2 Sept. | Moderate or heavy rain shower | 21° /13° | 11.8 mm | 5 | |
| 3 Sept. |  Patchy rain possible | 20° /14° | 1.7 mm | 5 | |
| 4 Sept. | Moderate rain at times | 19° /13° | 1.2 mm | 4 | |
| 5 Sept. | Patchy rain possible | 19° /12° | 0.8 mm | 5 | |
| 6 Sept. | Patchy rain possible | 23° /13° | 0.6 mm | 5 | |
| 7 Sept. | Moderate or heavy rain shower | 20° /13° | 8.2 mm | 5 | |
| 8 Sept. | Moderate or heavy rain shower | 19° /11° | 6.5 mm | 5 | |
| 9 Sept. | Patchy rain possible | 19° /11° | 2.4 mm | 5 | |
| 10 Sept. | Patchy rain possible | 19° /12° | 3 mm | 4 | |
| 11 Sept. | Patchy rain possible | 18° /11° | 2.3 mm | 4 | |
| 12 Sept. | Moderate rain at times | 17° /10° | 1.6 mm | 4 | |
| 13 Sept. |  Overcast | 17° /11° | 2 mm | 4 | |
| 14 Sept. |  Sunny | 19° /10° | 0.5 mm | 5 | |
| 15 Sept. | Sunny | 19° /9° | 0 mm | 5 | |
| 16 Sept. | Moderate rain at times | 19° /12° | 0.8 mm | 4 | |
| 17 Sept. | Overcast | 22° /12° | 0 mm | 6 | |
| 18 Sept. | Patchy rain possible | 24° /14° | 0.1 mm | 6 | |
| 19 Sept. |  Partly cloudy | 26° /14° | 0 mm | 6 | |
| 20 Sept. |  Cloudy | 23° /12° | 0.2 mm | 5 | |
| 21 Sept. |  Heavy rain at times | 19° /11° | 6.3 mm | 4 | |
| 22 Sept. | Moderate or heavy rain shower | 18° /12° | 9.4 mm | 5 | |
| 23 Sept. | Heavy rain at times | 16° /10° | 4.2 mm | 4 | |
| 24 Sept. | Patchy rain possible | 17° /12° | 3.3 mm | 4 | |
| 25 Sept. | Moderate or heavy rain shower | 16° /11° | 3.8 mm | 4 | |
| 26 Sept. | Heavy rain at times | 17° /10° | 1.9 mm | 4 | |
| 27 Sept. | Patchy rain possible | 16° /10° | 0.7 mm | 4 | |
| 28 Sept. | Patchy rain possible | 16° /10° | 1.1 mm | 4 | |
| 29 Sept. | Overcast | 17° /10° | 0.2 mm | 4 | |
| 30 Sept. | Patchy rain possible | 17° /11° | 0.3 mm | 5 | |
| 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
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.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 25°/14° | 19°/12° | 16°/10° |
| Rainfall | 111 mm | 128 mm | 99 mm |
| Wind | 22 km/h | 26 km/h | 21.3 km/h |
| Humidity | 71% | 76% | 81% |
| Rainy days | 3 days | 20 days | 19 days |
| Dry days | 28 days | 10 days | 12 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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