S
M
T
W
T
F
S
26
87°
69°
27
87°
70°
28
85°
70°
29
85°
70°
30
87°
70°
31
90°
71°
1
90°
69°
2
90°
70°
3
88°
70°
4
84°
70°
5
83°
66°
6
83°
69°
7
85°
69°
8
86°
70°
9
85°
71°
10
86°
70°
11
84°
69°
12
83°
70°
13
84°
69°
14
83°
68°
15
84°
68°
16
83°
69°
17
84°
70°
18
82°
67°
19
84°
68°
20
85°
67°
21
85°
67°
22
86°
68°
23
87°
69°
24
87°
69°
25
86°
68°
26
86°
69°
27
85°
69°
28
86°
68°
29
86°
68°
30
86°
69°
31
86°
69°
1
85°
68°
2
86°
68°
3
84°
67°
4
83°
69°
5
82°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Garden Grove
Garden Grove's August 2026 forecast shows daily high temperatures ranging from 82° to 87°, with overnight lows between 66° and 71°. The average high for August is 85° with an average low of 69°. 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 Garden Grove. See also: September | October | November.