The temperatures in Moncton in September are usually low and can range between 10°C and 19°C.
You can expect about 3 to 8 days of rain in Moncton 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 Moncton in September 2025.
If you’re planning to visit Moncton in the near future, we highly recommend that you review the 14 day weather forecast for Moncton before you arrive.
Temperatures
19° / 10°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
106
mm
Sun Hours
9.3
Hrs
