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Weather in La Rochelle for September 2025

Your guide to La Rochelle weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in La Rochelle is cooler than usual, with temperatures averaging 20 °C, this is -3.3 °C below the typical seasonal average.

  • Expect cooler weather in the next days in La Rochelle with the forecast suggesting a temperature of 19.6 °C, lower than the historical average.

  • In general, the average temperature in La Rochelle at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.

    • Rain 🌧️

  • La Rochelle experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 74.1 mm.

    • More

  • Is September a good time to visit La Rochelle? check out the best time to travel to La Rochelle page.

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

Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/16°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
70 %
Avg humidity

La Rochelle Weather September

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

Temperatures trend during September in La Rochelle

See the weather trend as well as the moving average line

September weather in La Rochelle day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 23° /17° 3.6 mm 5
2 Sept. Patchy rain possible
Patchy rain possible
 23° /17° 5.4 mm 5
3 Sept. Patchy rain possible
Patchy rain possible
 24° /18° 0.8 mm 6
4 Sept. Sunny
Sunny
 25° /17° 1.2 mm 6
5 Sept. Sunny
Sunny
 24° /16° 0.3 mm 6
6 Sept. Sunny
Sunny
 26° /17° 0.4 mm 6
7 Sept. Partly cloudy
Partly cloudy
 25° /18° 4.3 mm 6
8 Sept. Moderate rain at times
Moderate rain at times
 22° /18° 2.7 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 21° /17° 0.8 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 21° /17° 2.1 mm 5
11 Sept. Light rain shower
Light rain shower
 22° /16° 5.6 mm 5
12 Sept. Partly cloudy
Partly cloudy
 23° /16° 0.7 mm 5
13 Sept. Sunny
Sunny
 24° /16° 1.2 mm 6
14 Sept. Moderate rain at times
Moderate rain at times
 23° /16° 2.7 mm 6
15 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 0.2 mm 6
16 Sept. Patchy rain possible
Patchy rain possible
 19° /16° 0.2 mm 1
17 Sept. Sunny
Sunny
 21° /15° 0 mm 1.3
18 Sept. Sunny
Sunny
 27° /16° 0 mm 1.3
19 Sept. Patchy rain possible
Patchy rain possible
 25° /19° 0.4 mm 1.1
20 Sept. Moderate rain
Moderate rain
 19° /16° 9.4 mm 0.3
21 Sept. Patchy rain possible
Patchy rain possible
 18° /16° 0.3 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 17° /14° 0.7 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 0.2 mm 3
24 Sept. Partly cloudy
Partly cloudy
 18° /11° 0 mm 4
25 Sept. Sunny
Sunny
 19° /11° 0 mm 4
26 Sept. Sunny
Sunny
 19° /11° 0 mm 4
27 Sept. Partly cloudy
Partly cloudy
 19° /12° 0 mm 5
28 Sept. Overcast
Overcast
 18° /12° 0 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 18° /16° 1 mm 4
30 Sept. Sunny
Sunny
 19° /12° 0.7 mm 5
Next
Important Notice
Our weather forecast for La Rochelle 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 La Rochelle forecast closer to your planned date for the most up-to-date weather information.
Change Month
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La Rochelle weather in September vs August vs October

Compare September weather in La Rochelle 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
WeatherSunny
Sunny
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures24°/17°22°/16°19°/14°
Rainfall30 mm74 mm108 mm
Wind23.9 km/h23.3 km/h27.9 km/h
Humidity69%70%72%
Rainy days13 days22 days28 days
Dry days18 days8 days3 days

Planning a trip to La Rochelle? Discover the best time to visit

La Rochelle in September - FAQ

What are the expected maximum and minimum temperatures in La Rochelle during September?
During September, expect a variety of temperatures with highs around 22° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in La Rochelle during September?
Moderate rainfall is anticipated in La Rochelle during September, with a total of 74.1 mm spread over approximately 22 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in La Rochelle during September?
The average wind speed in La Rochelle during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to La Rochelle in September?

As you prepare for your trip to La Rochelle 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 La Rochelle, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable 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
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in La Rochelle

Explore the daily rainfall trends and prepare for La Rochelles September weather 💧

UV exposure in La Rochelle 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 La Rochelle?

Get accurate weather forecasts for La Rochelle, located at latitude 46.163 and longitude -1.152. Stay updated with localized weather information tailored for La Rochelle.

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