S
M
T
W
T
F
S
30
78°
62°
31
78°
66°
1
77°
66°
2
78°
65°
3
78°
65°
4
80°
66°
5
83°
65°
6
84°
66°
7
84°
66°
8
83°
65°
9
82°
64°
10
82°
65°
11
83°
65°
12
82°
64°
13
79°
63°
14
76°
63°
15
74°
62°
16
73°
62°
17
74°
61°
18
77°
61°
19
79°
60°
20
77°
61°
21
79°
60°
22
80°
55°
23
79°
54°
24
72°
59°
25
70°
56°
26
69°
58°
27
76°
57°
28
77°
58°
29
79°
57°
30
79°
56°
1
77°
54°
2
76°
55°
3
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Leonard
St. Leonard's September 2026 forecast shows daily high temperatures ranging from 69° to 84°, with overnight lows between 54° and 66°. The average high for September is 78° with an average low of 61°. 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 St. Leonard. See also: October | November | December.
