S
M
T
W
T
F
S
30
75°
48°
31
N/A
1
66°
53°
2
66°
49°
3
69°
55°
4
66°
56°
5
62°
55°
6
62°
49°
7
67°
51°
8
69°
56°
9
74°
58°
10
72°
56°
11
71°
60°
12
64°
52°
13
67°
53°
14
67°
53°
15
64°
53°
16
63°
52°
17
67°
53°
18
66°
51°
19
61°
51°
20
60°
50°
21
65°
52°
22
66°
51°
23
66°
51°
24
65°
50°
25
60°
50°
26
65°
48°
27
61°
49°
28
63°
49°
29
62°
47°
30
56°
46°
1
56°
46°
2
57°
47°
3
57°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sydney
Sydney's September 2026 forecast shows daily high temperatures ranging from 56° to 74°, with overnight lows between 46° and 60°. The average high for September is 64° 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. See also: October | November | December.
