September weather forecastLillers, France
September
Weather in September
September, the first month of the autumn in Lillers, is still a comfortable month, with an average temperature ranging between min 11.4°C (52.5°F) and max 19.6°C (67.3°F).Temperature
The shift from August to September includes a small decrease in the average high-temperature, from a pleasant 22.8°C (73°F) to a comfortable 19.6°C (67.3°F). Throughout September, Lillers witnesses a nighttime temperature average of 11.4°C (52.5°F).Humidity
In Lillers, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.4 days and typically collects 18mm (0.71") of precipitation.Snowfall
April through October are months without snowfall in Lillers.Daylight
The average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 07:05 and sunset at 20:34. On the last day of September, in Lillers, sunrise is at 07:49 and sunset at 19:30 CEST.
Sunshine
The average sunshine in September is 7.2h.UV index
In Lillers, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lillers, France
- Average high temperature in September: 19.6°C
The warmest months (with the highest average high temperature) are July and August (22.8°C).
The month with the lowest average high temperature is January (5.7°C).
- Average low temperature in September: 11.4°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 (1.2°C).
Average pressure in September
Lillers, France
- Average pressure in September: 1017.6mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1012.3mbar).
Average wind speed in September
Lillers, France
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is February (18.3km/h).
The calmest month (with the lowest average wind speed) is August (12.5km/h).
Average humidity in September
Lillers, France
- Average humidity in September: 77%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Lillers, France
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is December (49mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in September
Lillers, France
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is September (10.4 days).
Average snowfall in September
Lillers, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (30mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Lillers, 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 daylight in September /
Average sunshine in September
Lillers, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 12min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Lillers, France
- Average sunshine days in September: 17 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is January (11.3 days).
Average UV index in September
Lillers, 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
Lillers, France
- Average cloud cover in September: 44
The months with the most cloud cover are January and November (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in September
Lillers, 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).
