S
M
T
W
T
F
S
30
77°
49°
31
69°
49°
1
71°
56°
2
74°
57°
3
68°
49°
4
68°
55°
5
69°
48°
6
69°
49°
7
70°
48°
8
67°
47°
9
67°
48°
10
68°
48°
11
66°
46°
12
65°
47°
13
66°
46°
14
68°
50°
15
70°
43°
16
63°
42°
17
60°
41°
18
61°
42°
19
61°
43°
20
62°
43°
21
62°
42°
22
66°
42°
23
66°
48°
24
68°
49°
25
68°
49°
26
67°
48°
27
68°
40°
28
63°
37°
29
57°
39°
30
57°
47°
1
60°
49°
2
62°
48°
3
64°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montreal / Point Zero
Montreal / Point Zero's September 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 37° and 57°. The average high for September is 66° 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 September weather will actually feel in Montreal / Point Zero. See also: October | November | December.
