The temperatures in Lummen in September are usually low and can range between 11°C and 20°C.
You can expect about 3 to 8 days of rain in Lummen 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 Lummen in September 2026.
If you’re planning to visit Lummen in the near future, we highly recommend that you review the 14 day weather forecast for Lummen before you arrive.
Temperatures
20° / 11°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
67
mm
Sun Hours
9.9
Hrs
