Temperatures in September
It's warm in September in La Rochelle with an average temperature of 23°C. Temperatures this month range from a low of 20°C to a high of 26°C. At night, you can expect temperatures between 13°C and 17°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for La Rochelle in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in La Rochelle with warm temperatures, averaging around 25°C during the day and nights close to 16°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature stays the same at 25°C, with nights close to 16°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in La Rochelle will be around 22°C, with nights close to 14°C. A shower might show up, but overall the weather will be dry and sunny.
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Precipitation in September
In September, there is an average of 40 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 23% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for La Rochelle. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
La Rochelle in September |
London | ||
|---|---|---|---|
 Average Temperature |
23°C | 20°C | |
 High Temp |
26°C | 22°C | |
| Low Temp |
20°C | 17°C | |
 Total Precipitation |
40 mm | 44 mm | |
| Rainy Days |
7 days | 8 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit La Rochelle?
Want nice weather? Then September is a great time to be in La Rochelle. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for La Rochelle in September
With 34°C, La Rochelle hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 13°C in 2020. The extreme night temperatures ranged from a low of 7°C to a high of 22°C.
Check out the climate of La Rochelle for all months and discover the best travel time
Curious about the climate in other parts of France? Check out the weather and climate in places like Paris, Côte d'Azur, or have a look at other destinations in France.
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Daily Temperature in September in La Rochelle
This chart shows the average daily temperatures, both day and night, for each day in September in La Rochelle, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in La Rochelle
The chart below shows the average daily precipitation in September for La Rochelle, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 7 days of rain in La Rochelle.
Daily UV Index in September in La Rochelle
This chart shows the average daily UV index in September in La Rochelle, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in La Rochelle Over the Years
This chart shows the average temperature in September in La Rochelle, measured in degrees Celsius, over the past years.
Total Precipitation in September in La Rochelle Over the Years
This chart shows the average precipitation in September in La Rochelle, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for La Rochelle
Click on a specific day in September for detailed info on the typical weather on that day in La Rochelle. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in La Rochelle
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Average Weather in La Rochelle by Month
Click on a month below to see detailed weather info for La Rochelle. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of La Rochelle for all months at once
