Average data for 10 years
1 September
Monday
+23°
+18°
2 September
Tuesday
+23°
+19°
3 September
Wednesday
+24°
+19°
4 September
Thursday
+24°
+19°
5 September
Friday
+23°
+18°
6 September
Saturday
+23°
+18°
7 September
Sunday
+23°
+19°
8 September
Monday
+22°
+18°
9 September
Tuesday
+21°
+17°
10 September
Wednesday
+22°
+17°
11 September
Thursday
+22°
+17°
12 September
Friday
+22°
+17°
13 September
Saturday
+21°
+17°
14 September
Sunday
+21°
+17°
15 September
Monday
+20°
+16°
16 September
Tuesday
+20°
+15°
17 September
Wednesday
+21°
+16°
18 September
Thursday
+21°
+16°
19 September
Friday
+20°
+16°
20 September
Saturday
+21°
+16°
21 September
Sunday
+21°
+16°
22 September
Monday
+20°
+16°
23 September
Tuesday
+19°
+15°
24 September
Wednesday
+19°
+15°
25 September
Thursday
+19°
+15°
26 September
Friday
+19°
+15°
27 September
Saturday
+20°
+15°
28 September
Sunday
+19°
+15°
29 September
Monday
+18°
+14°
30 September
Tuesday
+17°
+13°
Cities near you
Canada
Toronto
United States
Detroit
United States
Pittsburgh
United States
Cleveland
United States
Macedonia
Cities with similar weather in September
Bulgaria
Burgas
Bulgaria
Varna
Montenegro
Podgorica
Bulgaria
The Golden Sands
United States
Chicago
In September, the weather in St Catharines is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, St Catharines has 11 sunny, 10 rainy, 6 partly cloudy, and 3 cloudy days in September. The rains are usually heavy.