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Lille in September: Weather, Average temperature and Climate

Discover the weather for Lille in September and if it’s a good time to travel (based on historical data).
Check flight prices to Lille on Avionero:
September

Weather in Lille in September 2025

OK Weather
Mild
🌧️
Rainy
September could be a good time to visit Lille, as the weather is generally fine. The average high temperature is around +19°C, and there are typically 5 sunny days in September. However, expect about 16 rainy days, and total monthly rainfall of approximately 65 mm. The weather is changeable so pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+19°C
Avg. max. temperature
+2°C
Min.
+34°C
Max.
65 mm
Total precipitation
81%
Avg. humidity
3 m/s
Avg. wind
5 ☀️
Sunny Days
9 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: Lille has OK weather in September.

Average temperature in Lille in September

Here are the expected maximum, average and minimum temperatures in Lille for September based on the historical data.
Last Year
Historical Data

The expected average maximum temperature in September is +25°C with a maximum of +34°C and a minimum of +8°C.

The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +23°C to +22°C.

Is Lille warm or cold in September?

Lille is typically mild in September.

Maximum temperatures go down compared to the previous month from +22°C to +19°C. The minimum temperature also goes down from +14°C to +11°C.

Pack a light jacket as it will be warm in the day and cool in the evenings.

Take a look at how September is compared to other months in Lille:

Climate in Lille in September

Lille weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+22°C+19°C+15°C
Min. temperature
+6°C+2°C-3°C
Max. temperature
+37°C+34°C+28°C
Rainfall
74 mm65 mm80 mm
Wind
3 m/s3 m/s3 m/s
Humidity
77%81%84%
Air pressure
1015 HPa1016 HPa1014 HPa
Sunny days
654
Cloudy days
799
Rainy days
181618
Snowy days
000

September weather is still as ok as in August. It’s getting colder in September. From +22°C in the day, the average maximum temperature lowers to +19°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 74 mm to 65 mm. Humidity rises from 77% to 81%. The average wind speed doesn’t change much during September, staying around 3 m/s. The days becoming less sunny, going from 6 sunny days in August to 5 in September.

October brings much the same weather, it remains ok.

Wind

Wind speed in Lille in September based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Lille is gradually decreasing during September, going from 2 m/s to 1 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Lille based on historical data.
Last Year
Historical Data
Total precipitation in September is about 216 mm, with a 47% chance of rain on a typical day. The maximum amount of rainfall per day is around 84 mm, which is considered heavy rain. September is a pretty wet month with over 14 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Lille wettest month is December, where a typical day has a 48% chance of precipitation and 88 mm of rainfall per day. February, on the other hand, is the driest month with a mere 41% chance of precipitation and 58 mm of rainfall per day.

How was the weather last September in Lille?

This is the weather in Lille in September 2023:
1 September
☁️
+23°C
2 September
🌫️
+27°C
3 September
☀️
+28°C
4 September
☀️
+29°C
5 September
☀️
+30°C
6 September
☀️
+30°C
7 September
☀️
+30°C
8 September
☀️
+32°C
9 September
☀️
+34°C
10 September
☀️
+33°C
11 September
☀️
+29°C
12 September
☁️
+24°C
13 September
☀️
+23°C
14 September
☀️
+26°C
15 September
☀️
+26°C
16 September
☀️
+27°C
17 September
☁️
+25°C
18 September
☀️
+24°C
19 September
☁️
+20°C
20 September
☀️
+24°C
21 September
🌧️
+21°C
22 September
☀️
+15°C
23 September
☀️
+20°C
24 September
☀️
+21°C
25 September
☀️
+24°C
26 September
☀️
+24°C
27 September
☀️
+25°C
28 September
☀️
+21°C
29 September
☀️
+20°C
30 September
☀️
+22°C
In September 2023 Lille had 24 sunny days, 4 cloudy days, and 1 rainy days. The average maximum temperature was +25°C, with an absolute maximum of +34°C and a minimum of +15°C. The average humidity was 80%, with a maximum of 100% and a minimum of 43%. The average wind speed was 3 m/s, with a maximum of 12 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change over Years

This is how Lille climate have been changing during last 43 years period.

The climate in Lille in September has not changed much over the last 43 years.

The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+17°C). The driest year was 1996 with only 423 mm of rainfall, and the wettest year was 2021 with 3143 mm.

FAQ

Frequently asked questions about the weather in Lille in September:

Is September a good time to visit Lille?

It’s always a good time to visit Lille, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Lille in September?

September has mild temperatures in Lille. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!

Is Lille rainy in September?

Lille is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Lille in September?

Usually, it’s not very sunny in Lille in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in France

Check out the weather for other cities in France.

Monthly weather in Lille

Source of the data

For this page, we’ve looked at the typical weather in Lille, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.