September weather forecast
Lille, France

Weather in September

The first month of the autumn, September, is also an enjoyable month in Lille, France, with an average temperature fluctuating between 19.9°C (67.8°F) and 11.4°C (52.5°F).

Temperature

In Lille, the average high-temperature in September slightly decreases from a warm 23.3°C (73.9°F) in August to a comfortable 19.9°C (67.8°F). In Lille, the average low-temperature is 11.4°C (52.5°F).

Humidity

In Lille, the average relative humidity in September is 77%.

Rainfall

September is the month with the least rainfall in Lille. Rain falls for 11.5 days and accumulates 19mm (0.75") of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Lille, the average length of the day in September is 12h and 37min.
On the first day of September, sunrise is at 07:01 and sunset at 20:33. On the last day of the month, sunrise is at 07:46 and sunset at 19:28 CEST.

Sunshine

The average sunshine in September in Lille is 7.2h.

UV index

In Lille, France, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Lille?

The average relative humidity in September is 77%.

What is the driest month in Lille?

September is the month with the least rainfall in Lille. Rain falls for 11.5 days and accumulates 19mm (0.75") of precipitation.

How much does it rain in Lille in September?

In Lille, in September, it is raining for 11.5 days, with typically 19mm (0.75") of accumulated precipitation.

When it does not snow in Lille?

April through October are months without snowfall in Lille.

What is the average length of the day in September in Lille?

In September, the average day length in Lille, France, is 12h and 37min.

When is the sunrise / sunset in September in Lille?

On the first day of September in Lille, sunrise is at 07:01 and sunset at 20:33. On the last day of the month, sunrise is at 07:46 and sunset at 19:28 CEST.

How many hours of sunshine does Lille have in September?

In September, the average sunshine duration in Lille, France, is 7.2h.

What is the UV index reading in September in Lille?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lille, France

Average temperature in September - Lille, France
  • Average high temperature in September: 19.9°C

The warmest month (with the highest average high temperature) is August (23.3°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 (14°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).

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Average pressure in September
Lille, France

Average pressure in September - Lille, 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 (1012.2mbar).

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Average wind speed in September
Lille, France

Average wind speed in September - Lille, France
  • Average wind speed in September: 12.5km/h

The windiest month (with the highest average wind speed) is December (18km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).

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Average humidity in September
Lille, France

Average humidity in September - Lille, France
  • Average humidity in September: 77%

The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is August (73%).

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Average rainfall in September
Lille, France

Average rainfall in September - Lille, France
  • Average rainfall in September: 19mm

The wettest month (with the highest rainfall) is December (42mm).
The driest month (with the least rainfall) is September (19mm).

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Average rainfall days in September
Lille, France

Average rainfall days in September - Lille, France
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is September (11.5 days).

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Average snowfall in September
Lille, France

Average snowfall in September - Lille, France
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (24mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Lille, France

Average snowfall days in September - Lille, France
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Lille, France

Average daylight in September / Average sunshine in September - Lille, France
  • Average daylight in September: 12h and 37min

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 4min).

  • Average sunshine in September: 7h and 12min

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).

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Average sunshine days in September
Lille, France

Average sunshine days in September - Lille, France
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is April (14.7 days).
The month with the least sunshine days is August (11.1 days).

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Average UV index in September
Lille, France

Average UV index in September - Lille, 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).

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Average cloud cover in September
Lille, France

Average cloud cover in September - Lille, France
  • Average cloud cover in September: 43

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are April and August (Cloud cover 41).

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Average visibility in September
Lille, France

Average visibility in September - Lille, 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).

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