S
M
T
W
T
F
S
26
86°
67°
27
86°
67°
28
85°
68°
29
86°
68°
30
86°
69°
31
85°
69°
1
86°
68°
2
86°
67°
3
83°
67°
4
83°
68°
5
84°
68°
6
86°
67°
7
85°
68°
8
85°
68°
9
86°
67°
10
87°
68°
11
86°
67°
12
87°
68°
13
88°
66°
14
87°
68°
15
82°
66°
16
85°
68°
17
83°
64°
18
83°
66°
19
Hist. Avg.
85°
65°
20
Hist. Avg.
85°
65°
21
Hist. Avg.
85°
65°
22
Hist. Avg.
85°
65°
23
Hist. Avg.
85°
65°
24
Hist. Avg.
85°
65°
25
Hist. Avg.
85°
65°
26
Hist. Avg.
85°
65°
27
Hist. Avg.
85°
65°
28
Hist. Avg.
85°
65°
29
Hist. Avg.
85°
65°
30
Hist. Avg.
85°
65°
31
Hist. Avg.
85°
65°
1
Hist. Avg.
85°
65°
2
Hist. Avg.
85°
65°
3
Hist. Avg.
85°
65°
4
Hist. Avg.
85°
65°
5
Hist. Avg.
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Tustin
Tustin's August 2026 forecast shows daily high temperatures ranging from 82° to 88°, with overnight lows between 64° and 69°. The average high for August is 85° 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 Tustin. See also: September | October | November.
