S
M
T
W
T
F
S
30
74°
54°
31
67°
50°
1
67°
51°
2
68°
50°
3
72°
58°
4
67°
57°
5
67°
52°
6
68°
54°
7
71°
52°
8
73°
56°
9
75°
57°
10
74°
57°
11
73°
56°
12
73°
55°
13
74°
56°
14
74°
55°
15
69°
53°
16
66°
50°
17
66°
49°
18
71°
53°
19
70°
49°
20
61°
47°
21
61°
45°
22
62°
49°
23
70°
52°
24
71°
52°
25
71°
51°
26
70°
52°
27
71°
52°
28
60°
49°
29
57°
49°
30
59°
47°
1
58°
48°
2
59°
41°
3
57°
34°
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 75°, with overnight lows between 34° and 58°. The average high for September is 68° 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-Lazare. See also: October | November | December.
