Click on a day for an hourly weather forecast
The temperatures in Lille in September are comfortable with low of 12°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Lille during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Lille in September 2025.
If you’re planning to visit Lille in the near future, we highly recommend that you review the 14 day weather forecast for Lille before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 2° | 9 | 17 | 5 | 77 mm | Awful | Lille in January |
| February | 7° / 2° | 7 | 17 | 4 | 61 mm | Awful | Lille in February |
| March | 11° / 4° | 7 | 23 | 1 | 59 mm | Bad | Lille in March |
| April | 15° / 6° | 3 | 26 | 1 | 42 mm | Good | Lille in April |
| May | 18° / 9° | 4 | 27 | 0 | 63 mm | Good | Lille in May |
| June | 21° / 12° | 5 | 25 | 0 | 81 mm | Good | Lille in June |
| July | 23° / 14° | 5 | 26 | 0 | 86 mm | Perfect | Lille in July |
| August | 23° / 15° | 5 | 26 | 0 | 79 mm | Perfect | Lille in August |
| September | 21° / 12° | 3 | 27 | 0 | 50 mm | Good | Lille in September |
| October | 16° / 9° | 5 | 26 | 0 | 70 mm | Good | Lille in October |
| November | 10° / 6° | 8 | 22 | 1 | 74 mm | Bad | Lille in November |
| December | 7° / 3° | 8 | 20 | 3 | 84 mm | Awful | Lille in December |