S
M
T
W
T
F
S
30
64°
48°
31
63°
49°
1
63°
47°
2
66°
51°
3
67°
51°
4
64°
52°
5
67°
51°
6
64°
50°
7
64°
49°
8
65°
50°
9
68°
50°
10
64°
53°
11
64°
51°
12
64°
52°
13
69°
53°
14
70°
52°
15
70°
48°
16
64°
47°
17
65°
48°
18
64°
47°
19
65°
48°
20
64°
49°
21
66°
48°
22
66°
48°
23
65°
49°
24
Hist. Avg.
69°
49°
25
Hist. Avg.
69°
49°
26
Hist. Avg.
69°
49°
27
Hist. Avg.
70°
49°
28
Hist. Avg.
70°
49°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
49°
1
Hist. Avg.
70°
49°
2
Hist. Avg.
70°
49°
3
Hist. Avg.
70°
49°
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 63° to 70°, with overnight lows between 47° and 53°. The average high for September is 65° 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.
