S
M
T
W
T
F
S
30
76°
57°
31
76°
53°
1
77°
59°
2
76°
59°
3
81°
66°
4
76°
62°
5
72°
57°
6
74°
55°
7
80°
55°
8
71°
58°
9
72°
65°
10
73°
52°
11
67°
54°
12
74°
62°
13
74°
59°
14
68°
55°
15
71°
60°
16
69°
56°
17
65°
53°
18
64°
51°
19
60°
51°
20
63°
53°
21
62°
35°
22
60°
50°
23
66°
51°
24
68°
50°
25
68°
50°
26
67°
48°
27
62°
46°
28
66°
49°
29
67°
50°
30
69°
51°
1
69°
50°
2
68°
49°
3
65°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Saint-Laurent
Saint-Laurent's September 2026 forecast shows daily high temperatures ranging from 60° to 74°, with overnight lows between 35° and 65°. The average high for September is 67° with an average low of 52°. 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 Saint-Laurent. See also: October | November | December.
