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 shift from August to September is characterized by an average high-temperature of a still pleasant 20.7°C (69.3°F), not significantly different from the 22.4°C (72.3°F) of August. September brings La Bernerie-en-Retz a consistent average low-temperature of 12.9°C (55.2°F).Humidity
The months with the lowest humidity are July through September, with an average relative humidity of 76%.Rainfall
In La Bernerie-en-Retz, in September, during 9.7 rainfall days, 23mm (0.91") of precipitation is typically accumulated. Throughout the year, there are 164.1 rainfall days, and 535mm (21.06") of precipitation is accumulated.Snowfall
In La Bernerie-en-Retz, snow does not fall in March, May through October.Sea temperature
In La Bernerie-en-Retz, in September, the average water temperature is 18.5°C (65.3°F).Note: Swimming is not enjoyable for most people in water that is 18.5°C (65.3°F). As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing control becomes harder.
Daylight
In La Bernerie-en-Retz, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 07:28 and sunset at 20:47. On the last day of September, in La Bernerie-en-Retz, sunrise is at 08:06 and sunset at 19:49 CEST.
Sunshine
In September, the average sunshine in La Bernerie-en-Retz is 8.1h.UV index
In September, the average daily maximum UV index in La Bernerie-en-Retz is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What is the temperature in September in La Bernerie-en-Retz?
What are the least humid months in La Bernerie-en-Retz?
What is the average humidity in September in La Bernerie-en-Retz?
How much does it rain in La Bernerie-en-Retz in September?
When it does not snow in La Bernerie-en-Retz?
How cold is the water in September in La Bernerie-en-Retz?
What is the average length of the day in September in La Bernerie-en-Retz?
When are sunrise and sunset in September in La Bernerie-en-Retz?
How many hours of sunshine does La Bernerie-en-Retz have in September?
What is the UV index reading in September in La Bernerie-en-Retz?
Average temperature in September
La Bernerie-en-Retz, France
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is July (22.6°C).
The month with the lowest average high temperature is January (9.3°C).
- Average low temperature in September: 12.9°C
The months with the highest average low temperature are July and August (14.8°C).
The coldest month (with the lowest average low temperature) is February (4.3°C).
Average pressure in September
La Bernerie-en-Retz, France
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1019mbar).
The month with the lowest atmospheric pressure is November (1013.3mbar).
Average wind speed in September
La Bernerie-en-Retz, France
- Average wind speed in September: 14.8km/h
The windiest month (with the highest average wind speed) is February (21.1km/h).
The calmest month (with the lowest average wind speed) is August (14.1km/h).
Average humidity in September
La Bernerie-en-Retz, France
- Average humidity in September: 76%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are July, August and September (76%).
Average rainfall in September
La Bernerie-en-Retz, France
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is December (77mm).
The driest month (with the least rainfall) is July (22mm).
Average rainfall days in September
La Bernerie-en-Retz, France
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is January (18.1 days).
The month with the least rainy days is September (9.7 days).
Average snowfall in September
La Bernerie-en-Retz, France
- Average snowfall in September: 0mm
The months with the highest snowfall are January, February, April, November and December (1mm).
The months with the least snowfall are March, May, June, July, August, September and October (0mm).
Average snowfall days in September
La Bernerie-en-Retz, France
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
La Bernerie-en-Retz, France
- Average sea temperature in September: 18.5°C
The best month for swimming (with the highest average sea temperature) is August (18.8°C).
The coldest month (with the lowest average sea temperature) is February (9.7°C).
Average daylight in September /
Average sunshine in September
La Bernerie-en-Retz, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
La Bernerie-en-Retz, France
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is November (10.5 days).
Average UV index in September
La Bernerie-en-Retz, France
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
La Bernerie-en-Retz, France
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in September
La Bernerie-en-Retz, France
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
La Bernerie-en-Retz, France
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