The temperatures in Brunswick 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 Brunswick 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 Brunswick in September 2026.
If you’re planning to visit Brunswick in the near future, we highly recommend that you review the 14 day weather forecast for Brunswick before you arrive.
Temperatures
20° / 11°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
61
mm
Sun Hours
9.9
Hrs
