S
M
T
W
T
F
S
27
70°
53°
28
67°
52°
29
69°
55°
30
69°
53°
1
66°
54°
2
68°
48°
3
62°
53°
4
65°
55°
5
66°
52°
6
61°
49°
7
64°
50°
8
66°
51°
9
67°
52°
10
67°
52°
11
66°
51°
12
67°
52°
13
68°
52°
14
68°
51°
15
67°
53°
16
66°
52°
17
67°
52°
18
64°
50°
19
63°
50°
20
62°
49°
21
62°
49°
22
63°
48°
23
60°
48°
24
57°
47°
25
55°
46°
26
56°
46°
27
61°
47°
28
61°
47°
29
60°
46°
30
58°
45°
31
58°
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 55° to 70°, with overnight lows between 45° and 55°. The average high for October is 64° with an average low of 50°. 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.
