S
M
T
W
T
F
S
30
78°
56°
31
77°
51°
1
78°
53°
2
79°
58°
3
78°
54°
4
80°
58°
5
79°
52°
6
74°
52°
7
72°
49°
8
73°
47°
9
70°
47°
10
67°
48°
11
71°
44°
12
70°
49°
13
72°
50°
14
75°
50°
15
74°
49°
16
74°
50°
17
73°
50°
18
73°
49°
19
72°
49°
20
74°
48°
21
73°
47°
22
72°
46°
23
71°
48°
24
74°
48°
25
72°
47°
26
70°
46°
27
71°
47°
28
71°
47°
29
70°
46°
30
70°
46°
1
69°
45°
2
68°
44°
3
66°
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 66° to 80°, with overnight lows between 43° and 58°. The average high for September is 73° with an average low of 49°. 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.
