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Loire-Atlantique (Nantes)
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Weather in Loire-Atlantique for September 2026

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

    Temperatures

  • Until now, September 2026 in Loire-Atlantique has been nearly identical to the historical average, with a temperature of 25.8 °C (showing only a slight deviation of 0.3 °C).

  • The forecast for the upcoming days in Loire-Atlantique predicts a temperature of 27.5 °C, which is slightly above the historical average.

  • In general, the average temperature in Loire-Atlantique at the beginning of September is 26.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.6 °C by the end of September.

    • Rain 🌧️

  • The climate of Loire-Atlantique in September is notably wet, with an average of 12 rainy days, and a total of 68.8 mm of precipitation.

    • 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
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/13°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Loire-Atlantique Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain shower
24°
2
Sunny
25°
3
Patchy rain possible
26°
4
Sunny
27°
5
Patchy rain possible
27°
6
Overcast
29°
7
Patchy rain possible
26°
8
Moderate or heavy rain shower
24°
9
Patchy rain possible
24°
10
Patchy rain possible
23°
11
Patchy rain possible
24°
12
Sunny
27°
13
Sunny
29°
14
Sunny
31°
15
Sunny
32°
16
Sunny
23°
17
Overcast
20°
18
Overcast
24°
19
Overcast
25°
20
Overcast
27°
21
Sunny
27°
22
Sunny
27°
23
Overcast
28°
24
Sunny
33°
25
Sunny
32°
26
Patchy rain possible
20°
27
Heavy rain at times
20°
28
Patchy rain possible
20°
29
Cloudy
19°
30
Sunny
21°

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
 24° /14° 4.4 mm 5
2 Sept. Sunny
Sunny
 25° /14° 1.8 mm 5
3 Sept. Patchy rain possible
Patchy rain possible
 26° /15° 1.9 mm 6
4 Sept. Sunny
Sunny
 27° /14° 1.3 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 27° /14° 0.1 mm 6
6 Sept. Overcast
Overcast
 29° /15° 0.9 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
 26° /16° 3.3 mm 5
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /15° 5.8 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 1.1 mm 6
10 Sept. Patchy rain possible
Patchy rain possible
 23° /13° 1.2 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 1.4 mm 5
12 Sept. Sunny
Sunny
 27° /12° 0 mm 5.4
13 Sept. Sunny
Sunny
 29° /14° 0 mm 5.5
14 Sept. Sunny
Sunny
 31° /16° 0 mm 5.5
15 Sept. Sunny
Sunny
 32° /17° 0 mm 8
16 Sept. Sunny
Sunny
 23° /10° 0 mm 6
17 Sept. Overcast
Overcast
 20° /9° 0 mm 5
18 Sept. Overcast
Overcast
 24° /9° 0 mm 6
19 Sept. Overcast
Overcast
 25° /11° 0 mm 5
20 Sept. Overcast
Overcast
 27° /11° 0 mm 6
21 Sept. Sunny
Sunny
 27° /13° 0 mm 7
22 Sept. Sunny
Sunny
 27° /11° 0 mm 7
23 Sept. Overcast
Overcast
 28° /10° 0 mm 7
24 Sept. Sunny
Sunny
 33° /14° 0 mm 8
25 Sept. Sunny
Sunny
 32° /16° 0 mm 8
26 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 1.7 mm 4
27 Sept. Heavy rain at times
Heavy rain at times
 20° /10° 2.1 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 20° /10° 0.6 mm 5
29 Sept. Cloudy
Cloudy
 19° /9° 1.2 mm 4
30 Sept. Sunny
Sunny
 21° /9° 0.9 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
Temperatures27°/14°23°/13°19°/11°
Rainfall34 mm69 mm98 mm
Wind21 km/h20.8 km/h22.8 km/h
Humidity62%68%73%
Rainy days6 days12 days12 days
Dry days25 days18 days19 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 68.8 mm spread over approximately 12 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 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Loire-Atlantique

Explore the daily rainfall trends and prepare for Loire-Atlantiques September weather 💧
Typically, Loire-Atlantique has 12 rainy days in September with a total of 68.8 mm of rainfall.

UV exposure in Loire-Atlantique during September

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

What to pack to Loire-Atlantique in September?

🌦️ Mild & changeable · highs around 23 °C, frequent showers

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.

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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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