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
September brings an average high-temperature of a comfortable 18.8°C (65.8°F), nearly identical to the preceding month. During the month of September, the temperature in Cayeux-sur-Mer, France, falls to an average of 11.6°C (52.9°F).Humidity
In Cayeux-sur-Mer, the average relative humidity in September is 80%.Rainfall
In Cayeux-sur-Mer, in September, during 13.6 rainfall days, 30mm (1.18") of precipitation is typically accumulated. Throughout the year, there are 190.2 rainfall days, and 547mm (21.54") of precipitation is accumulated.Snowfall
April through October are months without snowfall in Cayeux-sur-Mer.Sea temperature
August and September, with an average sea temperature of 17.8°C (64°F), are months with the warmest seawater.Note: For swimming, a surface water temperature of 17.8°C (64°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
Daylight
The average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 07:09 and sunset at 20:38. On the last day of September, in Cayeux-sur-Mer, sunrise is at 07:53 and sunset at 19:34 CEST.
Sunshine
The average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index in Cayeux-sur-Mer, France, is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are September temperatures in Cayeux-sur-Mer?
What is the average humidity in September in Cayeux-sur-Mer?
How much does it rain in Cayeux-sur-Mer in September?
When it does not snow in Cayeux-sur-Mer?
When is the sea warmest in Cayeux-sur-Mer?
What is the sea water temperature in September in Cayeux-sur-Mer?
How many hours of daylight does Cayeux-sur-Mer have in September?
When is the sunrise / sunset in September in Cayeux-sur-Mer?
How long on average sun shines in September in Cayeux-sur-Mer?
What is the UV index reading in September in Cayeux-sur-Mer?
Average temperature in September
Cayeux-sur-Mer, France
- Average high temperature in September: 18.8°C
The warmest month (with the highest average high temperature) is August (21.7°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in September: 11.6°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in September
Cayeux-sur-Mer, France
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is September (1017.7mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in September
Cayeux-sur-Mer, France
- Average wind speed in September: 14km/h
The windiest month (with the highest average wind speed) is December (20.3km/h).
The calmest month (with the lowest average wind speed) is August (13.4km/h).
Average humidity in September
Cayeux-sur-Mer, France
- Average humidity in September: 80%
The months with the highest relative humidity are January, November and December (87%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Cayeux-sur-Mer, France
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is December (71mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in September
Cayeux-sur-Mer, France
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is April (13.5 days).
Average snowfall in September
Cayeux-sur-Mer, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (29mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Cayeux-sur-Mer, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Cayeux-sur-Mer, France
- Average sea temperature in September: 17.8°C
The best months for swimming (with the highest average sea temperature) are August and September (17.8°C).
The coldest month (with the lowest average sea temperature) is March (7.9°C).
Average daylight in September /
Average sunshine in September
Cayeux-sur-Mer, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Cayeux-sur-Mer, France
- Average sunshine days in September: 13.5 days
The months with the most sunshine days are March and April (13.7 days).
The month with the least sunshine days is November (10.1 days).
Average UV index in September
Cayeux-sur-Mer, France
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Cayeux-sur-Mer, France
- Average cloud cover in September: 42
The months with the most cloud cover are January, November and December (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 40).
Average visibility in September
Cayeux-sur-Mer, France
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Cayeux-sur-Mer, France
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