S
M
T
W
T
F
S
30
77°
60°
31
75°
54°
1
75°
52°
2
79°
52°
3
64°
54°
4
79°
48°
5
77°
61°
6
73°
61°
7
68°
63°
8
68°
57°
9
72°
54°
10
81°
52°
11
72°
50°
12
59°
46°
13
63°
34°
14
59°
45°
15
61°
37°
16
59°
34°
17
66°
36°
18
70°
52°
19
66°
52°
20
63°
45°
21
66°
39°
22
61°
37°
23
N/A
24
72°
52°
25
68°
52°
26
66°
50°
27
66°
41°
28
61°
48°
29
73°
52°
30
66°
43°
1
59°
34°
2
63°
34°
3
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Perth
Perth's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Perth. See also: October | November | December.
