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Loire-Atlantique (Nantes)
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Weather in Loire-Atlantique for September 2025

Your guide to Loire-Atlantique weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Loire-Atlantique is cooler than usual, with temperatures averaging 21.5 °C, this is -3.6 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Loire-Atlantique with the forecast suggesting a temperature of 21.9 °C, lower than the historical average.

  • In general, the average temperature in Loire-Atlantique at the beginning of September is 26 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20 °C by the end of September.

    • Rain 🌧️

  • Loire-Atlantique experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 74.5 mm.

    • More

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

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

Average dry days
7
Dry days
Average rainy days
23
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/13°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
67 %
Avg humidity

Loire-Atlantique Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
23°
2
Sunny
25°
3
Patchy rain possible
26°
4
Moderate or heavy rain shower
27°
5
Patchy rain possible
27°
6
Patchy rain possible
28°
7
Partly cloudy
26°
8
Moderate or heavy rain shower
24°
9
Patchy rain possible
25°
10
Patchy rain possible
23°
11
Light rain shower
24°
12
Partly cloudy
24°
13
Sunny
25°
14
Moderate or heavy rain shower
25°
15
Patchy rain possible
24°
16
Patchy rain possible
21°
17
Sunny
25°
18
Sunny
30°
19
Partly cloudy
31°
20
Patchy rain possible
28°
21
Patchy rain possible
18°
22
Partly cloudy
18°
23
Patchy rain possible
16°
24
Cloudy
18°
25
Partly cloudy
20°
26
Partly cloudy
17°
27
Sunny
20°
28
Sunny
21°
29
Sunny
24°
30
Sunny
20°

Temperatures trend during September in Loire-Atlantique

See the weather trend as well as the moving average line

September weather in Loire-Atlantique 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
 23° /14° 5.2 mm 6
2 Sept. Sunny
Sunny
 25° /14° 2.2 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 26° /15° 2.3 mm 6
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /14° 1.6 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 27° /14° 0.1 mm 6
6 Sept. Patchy rain possible
Patchy rain possible
 28° /15° 1 mm 6
7 Sept. Partly cloudy
Partly cloudy
 26° /16° 3.8 mm 6
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /15° 6.8 mm 6
9 Sept. Patchy rain possible
Patchy rain possible
 25° /14° 1.3 mm 6
10 Sept. Patchy rain possible
Patchy rain possible
 23° /13° 1.5 mm 5
11 Sept. Light rain shower
Light rain shower
 24° /13° 1.6 mm 6
12 Sept. Partly cloudy
Partly cloudy
 24° /12° 0.5 mm 6
13 Sept. Sunny
Sunny
 25° /13° 1.5 mm 6
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 25° /13° 2 mm 6
15 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 0.1 mm 6
16 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 0.1 mm 1
17 Sept. Sunny
Sunny
 25° /12° 0 mm 1.2
18 Sept. Sunny
Sunny
 30° /12° 0 mm 1.3
19 Sept. Partly cloudy
Partly cloudy
 31° /17° 0 mm 1
20 Sept. Patchy rain possible
Patchy rain possible
 28° /16° 4.9 mm 0.4
21 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 0.1 mm 3
22 Sept. Partly cloudy
Partly cloudy
 18° /10° 0 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 1 mm 3
24 Sept. Cloudy
Cloudy
 18° /8° 0 mm 3
25 Sept. Partly cloudy
Partly cloudy
 20° /10° 0 mm 4
26 Sept. Partly cloudy
Partly cloudy
 17° /7° 0 mm 4
27 Sept. Sunny
Sunny
 20° /6° 0 mm 4
28 Sept. Sunny
Sunny
 21° /7° 0 mm 4
29 Sept. Sunny
Sunny
 24° /9° 0 mm 5
30 Sept. Sunny
Sunny
 20° /9° 1.1 mm 5
Next
Important Notice
Our weather forecast for Loire-Atlantique 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 Loire-Atlantique forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Loire-Atlantique weather in September vs August vs October

Compare September weather in Loire-Atlantique 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
Temperatures26°/14°23°/13°19°/11°
Rainfall37 mm74 mm113 mm
Wind20.8 km/h20.4 km/h22.3 km/h
Humidity63%67%74%
Rainy days11 days23 days24 days
Dry days20 days7 days7 days

Planning a trip to Loire-Atlantique? Discover the best time to visit

Loire-Atlantique in September - FAQ

What are the expected maximum and minimum temperatures in Loire-Atlantique during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Loire-Atlantique during September?
Moderate rainfall is anticipated in Loire-Atlantique during September, with a total of 74.5 mm spread over approximately 23 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Loire-Atlantique during September?
The average wind speed in Loire-Atlantique during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Loire-Atlantique in September?

As you prepare for your trip to Loire-Atlantique 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 Loire-Atlantique, 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
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • 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 Loire-Atlantique

Explore the daily rainfall trends and prepare for Loire-Atlantiques September weather 💧

UV exposure in Loire-Atlantique during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Loire-Atlantique?

Get accurate weather forecasts for Loire-Atlantique, located at latitude 47.217 and longitude -1.553. Stay updated with localized weather information tailored for Loire-Atlantique.

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