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
Calais, France, experiences a transition to a still refreshing 17.9°C (64.2°F) in average high-temperatures with the arrival of September, not greatly differing from August's 19.7°C (67.5°F). The September nights in Calais show a slight decrease to a mean low-temperature of 14.5°C (58.1°F).Humidity
With an average relative humidity of 78%, September is the least humid month in Calais, France.Rainfall
In Calais, France, in September, during 13.8 rainfall days, 34mm (1.34") of precipitation is typically accumulated. Throughout the year, in Calais, there are 178.1 rainfall days, and 461mm (18.15") of precipitation is accumulated.Snowfall
In Calais, France, snow does not fall in April through October.Sea temperature
The months with the warmest seawater are August and September, with an average sea temperature of 17.8°C (64°F).Note: For the majority, swimming in water with a temperature of 17.8°C (64°F) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day is 12h and 38min.On the first day of the month, sunrise is at 07:07 and sunset at 20:37. On the last day of September, sunrise is at 07:52 and sunset at 19:32 CEST.
Sunshine
In Calais, the average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What are September temperatures in Calais?
What is the least humid month in Calais?
What is the average humidity in September in Calais?
How many days does it rain in September in Calais?
When it does not snow in Calais?
When is the sea warmest in Calais?
What is the sea temperature in September in Calais?
What is the average length of the day in September in Calais?
What time are sunrise and sunset in September in Calais?
How many hours of sunshine does Calais have in September?
What is the UV index reading in September in Calais?
Average temperature in September
Calais, France
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (19.7°C).
The month with the lowest average high temperature is February (7.1°C).
- Average low temperature in September: 14.5°C
The month with the highest average low temperature is August (15.9°C).
The coldest months (with the lowest average low temperature) are January and February (4.5°C).
Average pressure in September
Calais, France
- Average pressure in September: 1017.4mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).
Average wind speed in September
Calais, France
- Average wind speed in September: 20.8km/h
The windiest month (with the highest average wind speed) is December (28.2km/h).
The calmest month (with the lowest average wind speed) is July (19km/h).
Average humidity in September
Calais, France
- Average humidity in September: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is September (78%).
Average rainfall in September
Calais, France
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is October (55mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Calais, France
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is November (19.5 days).
The month with the least rainy days is April (12.2 days).
Average snowfall in September
Calais, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Calais, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Calais, 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 (7.7°C).
Average daylight in September /
Average sunshine in September
Calais, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 4h and 6min).
Average sunshine days in September
Calais, France
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is April (15.7 days).
The month with the least sunshine days is November (8.8 days).
Average UV index in September
Calais, 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 and February (UV index 2).
Average cloud cover in September
Calais, France
- Average cloud cover in September: 40
The months with the most cloud cover are November and December (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 39).
Average visibility in September
Calais, 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).
Calais, France
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