S
M
T
W
T
F
S
27
66°
55°
28
61°
51°
29
66°
53°
30
68°
58°
1
70°
59°
2
65°
49°
3
62°
50°
4
61°
49°
5
60°
48°
6
58°
48°
7
63°
50°
8
61°
49°
9
57°
46°
10
59°
45°
11
54°
44°
12
62°
44°
13
51°
37°
14
49°
35°
15
49°
43°
16
57°
43°
17
57°
44°
18
59°
43°
19
59°
40°
20
50°
42°
21
56°
34°
22
45°
32°
23
45°
32°
24
52°
42°
25
57°
41°
26
56°
30°
27
43°
29°
28
43°
34°
29
52°
40°
30
53°
41°
31
54°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Montreal
Montreal's October 2026 forecast shows daily high temperatures ranging from 43° to 70°, with overnight lows between 29° and 59°. The average high for October is 57° with an average low of 43°. 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 Montreal. See also: November | December | January.
