S
M
T
W
T
F
S
30
63°
49°
31
64°
48°
1
62°
51°
2
62°
48°
3
63°
48°
4
62°
47°
5
62°
48°
6
63°
47°
7
65°
49°
8
66°
52°
9
66°
51°
10
61°
52°
11
63°
51°
12
63°
52°
13
65°
52°
14
65°
50°
15
64°
50°
16
60°
47°
17
60°
46°
18
61°
45°
19
59°
44°
20
59°
44°
21
60°
46°
22
60°
46°
23
59°
44°
24
60°
47°
25
60°
49°
26
59°
48°
27
59°
45°
28
58°
45°
29
58°
44°
30
59°
44°
1
58°
43°
2
58°
44°
3
57°
44°
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 57° to 66°, with overnight lows between 43° and 52°. The average high for September is 61° with an average low of 47°. 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.
