S
M
T
W
T
F
S
30
66°
48°
31
66°
49°
1
67°
51°
2
66°
51°
3
66°
50°
4
67°
49°
5
67°
52°
6
68°
49°
7
67°
50°
8
69°
55°
9
71°
52°
10
68°
53°
11
67°
55°
12
73°
52°
13
70°
50°
14
73°
54°
15
68°
52°
16
68°
52°
17
69°
53°
18
68°
50°
19
68°
51°
20
72°
56°
21
74°
59°
22
74°
54°
23
73°
52°
24
71°
51°
25
70°
52°
26
69°
51°
27
70°
52°
28
69°
51°
29
69°
52°
30
70°
58°
1
70°
56°
2
74°
53°
3
70°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sydney South
Sydney South's September 2026 forecast shows daily high temperatures ranging from 66° to 74°, with overnight lows between 48° and 59°. The average high for September is 69° with an average low of 52°. 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 Sydney South. See also: October | November | December.
