S
M
T
W
T
F
S
27
69°
61°
28
N/A
29
70°
60°
30
75°
59°
1
74°
64°
2
64°
48°
3
64°
46°
4
69°
51°
5
62°
44°
6
58°
47°
7
66°
52°
8
68°
53°
9
67°
52°
10
68°
58°
11
70°
55°
12
61°
48°
13
62°
49°
14
60°
50°
15
61°
44°
16
65°
50°
17
65°
49°
18
63°
50°
19
64°
48°
20
60°
45°
21
53°
44°
22
53°
47°
23
56°
48°
24
62°
47°
25
60°
46°
26
62°
39°
27
50°
39°
28
53°
40°
29
56°
43°
30
53°
43°
31
59°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in St. Catharines
St. Catharines's October 2026 forecast shows daily high temperatures ranging from 50° to 70°, with overnight lows between 39° and 58°. The average high for October is 61° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in St. Catharines. See also: November | December | January.
