S
M
T
W
T
F
S
30
71°
50°
31
68°
50°
1
67°
53°
2
66°
52°
3
67°
48°
4
69°
52°
5
74°
57°
6
75°
57°
7
71°
50°
8
75°
46°
9
69°
58°
10
74°
48°
11
77°
45°
12
68°
53°
13
74°
54°
14
73°
43°
15
71°
41°
16
61°
42°
17
62°
45°
18
65°
49°
19
66°
51°
20
67°
51°
21
68°
52°
22
66°
51°
23
69°
50°
24
67°
52°
25
68°
50°
26
72°
51°
27
69°
38°
28
70°
35°
29
57°
37°
30
56°
38°
1
57°
38°
2
58°
37°
3
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Perth
Perth's September 2026 forecast shows daily high temperatures ranging from 56° to 77°, with overnight lows between 35° and 58°. The average high for September is 68° with an average low of 48°. 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.
