S
M
T
W
T
F
S
30
64°
55°
31
67°
50°
1
65°
44°
2
62°
49°
3
63°
51°
4
64°
48°
5
62°
46°
6
63°
48°
7
63°
50°
8
62°
51°
9
62°
52°
10
64°
51°
11
61°
51°
12
61°
52°
13
62°
51°
14
61°
51°
15
63°
52°
16
63°
51°
17
62°
51°
18
62°
50°
19
61°
51°
20
62°
50°
21
62°
50°
22
60°
49°
23
61°
47°
24
62°
49°
25
59°
50°
26
61°
49°
27
60°
48°
28
60°
47°
29
59°
49°
30
58°
49°
1
60°
48°
2
61°
49°
3
60°
48°
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 58° to 67°, with overnight lows between 44° and 55°. The average high for September is 62° 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 Perth. See also: October | November | December.
