S
M
T
W
T
F
S
30
77°
58°
31
76°
57°
1
77°
59°
2
78°
56°
3
76°
50°
4
68°
47°
5
67°
56°
6
68°
57°
7
75°
57°
8
75°
56°
9
76°
55°
10
70°
50°
11
73°
52°
12
74°
56°
13
74°
56°
14
73°
54°
15
73°
51°
16
70°
45°
17
65°
52°
18
68°
47°
19
65°
45°
20
66°
43°
21
61°
42°
22
60°
49°
23
62°
46°
24
61°
42°
25
60°
41°
26
59°
41°
27
60°
49°
28
67°
42°
29
64°
40°
30
58°
40°
1
59°
42°
2
59°
37°
3
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Saint-Lazare
Saint-Lazare's September 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 37° and 59°. The average high for September is 68° with an average low of 49°. 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-Lazare. See also: October | November | December.
