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
74°
61°
9
71°
59°
10
73°
55°
11
66°
54°
12
75°
63°
13
76°
55°
14
67°
50°
15
67°
60°
16
73°
60°
17
68°
55°
18
67°
54°
19
65°
51°
20
62°
51°
21
66°
53°
22
67°
54°
23
65°
56°
24
66°
44°
25
58°
40°
26
59°
44°
27
60°
50°
28
63°
46°
29
59°
41°
30
60°
49°
1
65°
48°
2
59°
45°
3
63°
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 58° to 76°, with overnight lows between 40° and 63°. The average high for September is 65° with an average low of 51°. 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.
