The temperatures in Saint Catharines in September are comfortable with low of 15°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Saint Catharines 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 Saint Catharines in September 2024.
If you’re planning to visit Saint Catharines in the near future, we highly recommend that you review the 14 day weather forecast for Saint Catharines before you arrive.
Temperatures
22° / 15°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
113
mm
Sun Hours
7.8
Hrs
