Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September introduces an average high-temperature of an agreeable 21.4°C (70.5°F), closely mirroring the preceding month. Throughout September, an average low-temperature of 14.8°C (58.6°F) is expected in La Rochelle, France.Humidity
September is the least humid month in La Rochelle, with an average relative humidity of 71%.Rainfall
In La Rochelle, during September, the rain falls for 9.5 days and regularly aggregates up to 32mm (1.26") of precipitation. Throughout the year, in La Rochelle, there are 161.5 rainfall days, and 528mm (20.79") of precipitation is accumulated.Snowfall
In La Rochelle, snow does not fall in January, April through November.Sea temperature
In September, the average sea temperature is 19.3°C (66.7°F).Note: For most individuals, swimming in 19.3°C (66.7°F) is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 21°C (69.8°F).
Daylight
In September, the average length of the day in La Rochelle, France, is 12h and 32min.On the first day of the month, sunrise is at 07:25 and sunset at 20:43. On the last day of September, in La Rochelle, sunrise is at 08:02 and sunset at 19:46 CEST.
Sunshine
In La Rochelle, the average sunshine in September is 8.4h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, an average UV index of 5 transforms into the following instructions:
Undertake protective steps - Preventing sun damage is advised. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What is the average September temperature in La Rochelle?
What is the least humid month in La Rochelle?
What is the average humidity in September in La Rochelle?
How much does it rain in La Rochelle in September?
When it does not snow in La Rochelle?
What is the sea temperature in September in La Rochelle?
What is the average length of the day in September in La Rochelle?
When is the sunrise / sunset in September in La Rochelle?
How long on average sun shines in September in La Rochelle?
What are the months with the highest UV index in La Rochelle?
How high is the UV index in September in La Rochelle?
Average temperature in September
La Rochelle, France
- Average high temperature in September: 21.4°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (9.4°C).
- Average low temperature in September: 14.8°C
The month with the highest average low temperature is August (17°C).
The coldest month (with the lowest average low temperature) is February (5.4°C).
Average pressure in September
La Rochelle, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1019.9mbar).
The month with the lowest atmospheric pressure is November (1014.1mbar).
Average wind speed in September
La Rochelle, France
- Average wind speed in September: 15.4km/h
The windiest month (with the highest average wind speed) is December (21.6km/h).
The calmest month (with the lowest average wind speed) is August (14.5km/h).
Average humidity in September
La Rochelle, France
- Average humidity in September: 71%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is September (71%).
Average rainfall in September
La Rochelle, France
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is November (84mm).
The driest month (with the least rainfall) is July (26mm).
Average rainfall days in September
La Rochelle, France
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is November (16.9 days).
The month with the least rainy days is September (9.5 days).
Average snowfall in September
La Rochelle, France
- Average snowfall in September: 0mm
The month with the highest snowfall is March (4mm).
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
La Rochelle, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
La Rochelle, France
- Average sea temperature in September: 19.3°C
The best month for swimming (with the highest average sea temperature) is August (19.8°C).
The coldest month (with the lowest average sea temperature) is February (9.9°C).
Average daylight in September /
Average sunshine in September
La Rochelle, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January, November and December (Average sunshine: 4h and 54min).
Average sunshine days in September
La Rochelle, France
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is September (18.9 days).
The month with the least sunshine days is November (10.9 days).
Average UV index in September
La Rochelle, France
- Average UV index in September: 5
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in September
La Rochelle, France
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 28).
Average visibility in September
La Rochelle, France
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
La Rochelle, France
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