S
M
T
W
T
F
S
27
69°
61°
28
N/A
29
70°
60°
30
75°
59°
1
74°
64°
2
67°
56°
3
61°
53°
4
70°
51°
5
64°
52°
6
64°
50°
7
69°
55°
8
69°
55°
9
69°
51°
10
61°
52°
11
62°
57°
12
71°
59°
13
77°
63°
14
66°
55°
15
56°
53°
16
68°
48°
17
51°
43°
18
64°
45°
19
69°
52°
20
59°
49°
21
58°
47°
22
64°
46°
23
56°
47°
24
57°
44°
25
64°
47°
26
64°
51°
27
53°
46°
28
56°
45°
29
71°
50°
30
57°
40°
31
57°
41°
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 57° to 57°, with overnight lows between 40° and 41°. The average high for October is 57° with an average low of 41°. 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.
