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Weather in Saint-Malo for September 2025

Your guide to Saint-Malo weather in September - trends and predictions

    Temperatures

  • The forecast for the first days of September 2025 in Saint-Malo predicts a temperature of 21.6 °C, which is slightly above the historical average.

  • In general, the average temperature in Saint-Malo at the beginning of September is 20.9 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 18.1 °C by the end of September.

    • Rain 🌧️

  • Saint-Malo experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 80.1 mm.

    • More

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

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

Average dry days
5
Dry days
Average rainy days
25
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/14°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Saint-Malo Weather September

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

Temperatures trend during September in Saint-Malo

See the weather trend as well as the moving average line

September weather in Saint-Malo day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 0.2 mm 4
2 Sept. Patchy rain possible
Patchy rain possible
 22° /15° 0.4 mm 4
3 Sept. Patchy rain possible
Patchy rain possible
 19° /14° 1 mm 4
4 Sept. Patchy rain possible
Patchy rain possible
 18° /16° 1.3 mm 4
5 Sept. Patchy rain possible
Patchy rain possible
 20° /16° 0.1 mm 4
6 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 1.4 mm 5
7 Sept. Sunny
Sunny
 24° /16° 4.1 mm 6
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /15° 8.2 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 22° /16° 2.7 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 22° /14° 2.9 mm 5
11 Sept. Partly cloudy
Partly cloudy
 21° /14° 0.7 mm 6
12 Sept. Sunny
Sunny
 21° /14° 1.5 mm 5
13 Sept. Partly cloudy
Partly cloudy
 21° /15° 4.9 mm 5
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /14° 3.6 mm 5
15 Sept. Moderate rain at times
Moderate rain at times
 20° /13° 0.4 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 1.1 mm 5
17 Sept. Overcast
Overcast
 21° /14° 1.1 mm 5
18 Sept. Partly cloudy
Partly cloudy
 20° /13° 1 mm 5
19 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 0.2 mm 5
20 Sept. Overcast
Overcast
 19° /13° 5.3 mm 5
21 Sept. Partly cloudy
Partly cloudy
 19° /12° 2.6 mm 5
22 Sept. Sunny
Sunny
 20° /12° 1.3 mm 5
23 Sept. Sunny
Sunny
 18° /12° 3.7 mm 4
24 Sept. Cloudy
Cloudy
 19° /13° 1.6 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 3.5 mm 5
26 Sept. Moderate rain at times
Moderate rain at times
 19° /13° 2.6 mm 5
27 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /12° 3.5 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 5.2 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 2.2 mm 4
30 Sept. Cloudy
Cloudy
 19° /11° 1.2 mm 5
Next
Important Notice
Our weather forecast for Saint-Malo 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 Saint-Malo forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Saint-Malo weather in September vs August vs October

Compare September weather in Saint-Malo 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°/15°20°/14°17°/12°
Rainfall58 mm80 mm84 mm
Wind22.3 km/h23.9 km/h26.5 km/h
Humidity74%74%76%
Rainy days19 days25 days23 days
Dry days12 days5 days8 days

Planning a trip to Saint-Malo? Discover the best time to visit

Saint-Malo in September - FAQ

What are the expected maximum and minimum temperatures in Saint-Malo during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Saint-Malo during September?
Moderate rainfall is anticipated in Saint-Malo during September, with a total of 80.1 mm spread over approximately 25 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Saint-Malo during September?
The average wind speed in Saint-Malo during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Saint-Malo in September?

As you prepare for your trip to Saint-Malo 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 Saint-Malo, 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 Saint-Malo

Explore the daily rainfall trends and prepare for Saint-Malos September weather 💧

UV exposure in Saint-Malo during September

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

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Location coordinates Where is Saint-Malo?

Get accurate weather forecasts for Saint-Malo, located at latitude 48.647 and longitude -2.009. Stay updated with localized weather information tailored for Saint-Malo.

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