S
M
T
W
T
F
S
30
82°
63°
31
77°
63°
1
77°
56°
2
80°
53°
3
83°
55°
4
89°
63°
5
79°
49°
6
83°
58°
7
88°
60°
8
75°
53°
9
66°
46°
10
65°
49°
11
67°
52°
12
68°
50°
13
67°
50°
14
67°
51°
15
64°
46°
16
65°
49°
17
65°
48°
18
71°
53°
19
70°
53°
20
67°
50°
21
63°
47°
22
67°
46°
23
69°
52°
24
69°
50°
25
68°
53°
26
69°
52°
27
66°
49°
28
65°
47°
29
60°
46°
30
63°
45°
1
60°
44°
2
56°
44°
3
55°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Au
Au's September 2026 forecast shows daily high temperatures ranging from 55° to 89°, with overnight lows between 43° and 63°. The average high for September is 68° with an average low of 50°. 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 Au. See also: October | November | December.
