S
M
T
W
T
F
S
30
68°
53°
31
69°
55°
1
67°
56°
2
69°
54°
3
69°
52°
4
67°
53°
5
68°
56°
6
66°
50°
7
68°
53°
8
67°
54°
9
70°
55°
10
71°
52°
11
68°
55°
12
67°
52°
13
70°
54°
14
69°
53°
15
69°
48°
16
65°
50°
17
67°
48°
18
68°
53°
19
68°
55°
20
69°
55°
21
69°
54°
22
68°
54°
23
67°
52°
24
66°
53°
25
66°
53°
26
65°
52°
27
66°
53°
28
65°
52°
29
67°
51°
30
66°
51°
1
Hist. Avg.
61°
49°
2
Hist. Avg.
61°
49°
3
Hist. Avg.
60°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St Leonards
St Leonards's September 2026 forecast shows daily high temperatures ranging from 65° to 71°, with overnight lows between 48° and 56°. The average high for September is 68° with an average low of 53°. 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 Leonards. See also: October | November | December.