The temperatures in Sint Niklaas in September are usually low and can range between 12°C and 20°C.
You can expect about 3 to 8 days of rain in Sint Niklaas 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 Sint Niklaas in September 2026.
If you’re planning to visit Sint Niklaas in the near future, we highly recommend that you review the 14 day weather forecast for Sint Niklaas before you arrive.
Temperatures
20° / 12°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
42
mm
Sun Hours
9.5
Hrs
