S
M
T
W
T
F
S
30
89°
65°
31
87°
72°
1
97°
70°
2
86°
71°
3
90°
71°
4
90°
72°
5
81°
67°
6
80°
64°
7
80°
62°
8
84°
59°
9
87°
68°
10
90°
74°
11
79°
69°
12
80°
69°
13
87°
74°
14
81°
64°
15
81°
53°
16
82°
58°
17
88°
67°
18
85°
69°
19
80°
67°
20
87°
71°
21
74°
66°
22
68°
60°
23
65°
58°
24
65°
58°
25
71°
58°
26
66°
58°
27
64°
58°
28
69°
61°
29
74°
58°
30
76°
61°
1
78°
59°
2
76°
58°
3
75°
61°
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 64° to 78°, with overnight lows between 58° and 61°. The average high for September is 72° with an average low of 59°. 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.
