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Weather in Dinan for September 2025

Your guide to Dinan weather in September - trends and predictions

    Temperatures

  • So far, September 2025 in Dinan is slightly warmer than the historical average by 0.9 °C.

  • The forecast for the next days in Dinan predicts temperatures to be around 21 °C, close to the historical average.

  • In general, the average temperature in Dinan at the beginning of September is 20.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • Dinan 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 Dinan? check out the best time to travel to Dinan 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

Dinan 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
24°
15
Patchy rain possible
19°
16
Patchy rain possible
20°
17
Patchy rain possible
21°
18
Patchy rain possible
17°
19
Patchy rain possible
23°
20
Sunny
25°
21
Patchy rain possible
22°
22
Patchy rain possible
20°
23
Partly cloudy
21°
24
Patchy rain possible
20°
25
Partly cloudy
17°
26
Sunny
18°
27
Patchy rain possible
14°
28
Patchy rain possible
14°
29
Overcast
15°
30
Patchy rain possible
16°

Temperatures trend during September in Dinan

See the weather trend as well as the moving average line

September weather in Dinan 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
 24° /13° 0.5 mm 0.7
15 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 0.1 mm 0.8
16 Sept. Patchy rain possible
Patchy rain possible
 20° /12° 0.1 mm 0.7
17 Sept. Patchy rain possible
Patchy rain possible
 21° /16° 1.2 mm 0.6
18 Sept. Patchy rain possible
Patchy rain possible
 17° /13° 2.1 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
 23° /13° 0.5 mm 4
20 Sept. Sunny
Sunny
 25° /15° 0 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 22° /18° 0.1 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 1.1 mm 4
23 Sept. Partly cloudy
Partly cloudy
 21° /13° 0 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.5 mm 4
25 Sept. Partly cloudy
Partly cloudy
 17° /12° 0.1 mm 4
26 Sept. Sunny
Sunny
 18° /11° 0 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 Dinan 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 Dinan forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Dinan weather in September vs August vs October

Compare September weather in Dinan 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 Dinan? Discover the best time to visit

Dinan in September - FAQ

What are the expected maximum and minimum temperatures in Dinan 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 Dinan during September?
Significant rainfall exceeding 128.1 mm is expected in Dinan during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Dinan during September?
The average wind speed in Dinan during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Dinan in September?

As you prepare for your trip to Dinan 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 Dinan, 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 Dinan

Explore the daily rainfall trends and prepare for Dinans September weather 💧

UV exposure in Dinan during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is Dinan?

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

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