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 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
September
Weather in September
Temperature
The initiation of September sees an average high-temperature of a refreshing 18.7°C (65.7°F), showing minor variations from the previous month. Throughout September, Gravelines witnesses a consistent average low-temperature of 13.6°C (56.5°F).Humidity
In Gravelines, France, the average relative humidity in September is 76%.Rainfall
In Gravelines, France, in September, it is raining for 14.1 days, with typically 33mm (1.3") of accumulated precipitation. In Gravelines, during the entire year, the rain falls for 185 days and collects up to 507mm (19.96") of precipitation.Snowfall
In Gravelines, France, snow does not fall in April through October.Daylight
The average length of the day in September in Gravelines, France, is 12h and 38min.On the first day of the month, sunrise is at 07:05 and sunset at 20:36. On the last day of September, in Gravelines, France, sunrise is at 07:51 and sunset at 19:31 CEST.
Sunshine
In September, the average sunshine in Gravelines is 7.4h.UV index
In Gravelines, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Gravelines?
What is the average humidity in September in Gravelines?
How many days does it rain in September in Gravelines?
When it does not snow in Gravelines?
What is the average length of the day in September in Gravelines?
What time are sunrise and sunset in September in Gravelines?
How long on average sun shines in September in Gravelines?
What is the UV index intensity in September in Gravelines?
Average temperature in September
Gravelines, France
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is August (21°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is January (3.6°C).
Average pressure in September
Gravelines, 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 (1011.6mbar).
Average wind speed in September
Gravelines, France
- Average wind speed in September: 17.7km/h
The windiest month (with the highest average wind speed) is December (24km/h).
The calmest month (with the lowest average wind speed) is July (16.6km/h).
Average humidity in September
Gravelines, France
- Average humidity in September: 76%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Gravelines, France
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is December (59mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Gravelines, France
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is November (18.3 days).
The month with the least rainy days is April (11.6 days).
Average snowfall in September
Gravelines, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (28mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Gravelines, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Gravelines, 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 42min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Gravelines, France
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is April (16.5 days).
The month with the least sunshine days is November (9.1 days).
Average UV index in September
Gravelines, 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
Gravelines, France
- Average cloud cover in September: 41
The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is April (Cloud cover 38).
Average visibility in September
Gravelines, France
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, November and December (9km).
