S
M
T
W
T
F
S
26
81°
63°
27
79°
63°
28
74°
63°
29
74°
59°
30
75°
57°
31
79°
60°
1
80°
62°
2
78°
60°
3
81°
60°
4
79°
62°
5
82°
61°
6
80°
62°
7
77°
60°
8
78°
57°
9
80°
60°
10
79°
61°
11
79°
61°
12
80°
60°
13
80°
60°
14
79°
59°
15
75°
56°
16
77°
60°
17
79°
60°
18
79°
59°
19
74°
58°
20
76°
58°
21
72°
57°
22
74°
59°
23
78°
54°
24
78°
50°
25
69°
52°
26
71°
58°
27
77°
59°
28
77°
58°
29
76°
56°
30
71°
50°
31
68°
50°
1
67°
53°
2
66°
52°
3
67°
48°
4
69°
52°
5
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Perth
Perth's August 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 48° and 63°. The average high for August is 76° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Perth. See also: September | October | November.
