S
M
T
W
T
F
S
26
74°
63°
27
76°
65°
28
72°
64°
29
72°
66°
30
75°
64°
31
74°
66°
1
72°
66°
2
73°
66°
3
72°
65°
4
72°
62°
5
72°
61°
6
73°
63°
7
79°
63°
8
79°
62°
9
79°
64°
10
79°
64°
11
78°
65°
12
74°
63°
13
72°
64°
14
72°
64°
15
73°
62°
16
72°
60°
17
74°
61°
18
75°
60°
19
76°
62°
20
74°
62°
21
79°
64°
22
80°
64°
23
91°
65°
24
N/A
25
86°
71°
26
87°
72°
27
89°
73°
28
90°
72°
29
92°
65°
30
87°
64°
31
89°
66°
1
88°
65°
2
89°
66°
3
86°
65°
4
85°
66°
5
86°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Aliso Viejo
Aliso Viejo's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 64° and 73°. The average high for August is 88° with an average low of 67°. 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 Aliso Viejo. See also: September | October | November.
