S
M
T
W
T
F
S
30
71°
50°
31
71°
46°
1
72°
45°
2
71°
44°
3
60°
53°
4
68°
58°
5
66°
48°
6
64°
46°
7
74°
46°
8
62°
38°
9
60°
33°
10
70°
52°
11
58°
43°
12
71°
37°
13
64°
49°
14
63°
46°
15
63°
38°
16
70°
52°
17
67°
44°
18
61°
47°
19
56°
36°
20
56°
34°
21
56°
43°
22
62°
36°
23
63°
33°
24
74°
36°
25
N/A
26
72°
45°
27
68°
43°
28
63°
49°
29
60°
46°
30
65°
47°
1
71°
50°
2
66°
46°
3
63°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Saint-Leonard
Saint-Leonard's September 2026 forecast shows daily high temperatures ranging from 60° to 72°, with overnight lows between 42° and 50°. The average high for September is 66° with an average low of 46°. 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-Leonard. See also: October | November | December.
