S
M
T
W
T
F
S
26
82°
68°
27
87°
68°
28
88°
69°
29
89°
68°
30
88°
68°
31
88°
67°
1
87°
67°
2
88°
68°
3
88°
68°
4
87°
67°
5
89°
68°
6
88°
68°
7
85°
60°
8
89°
64°
9
88°
61°
10
84°
60°
11
83°
59°
12
84°
60°
13
86°
63°
14
88°
65°
15
88°
65°
16
83°
64°
17
83°
61°
18
85°
64°
19
86°
64°
20
82°
65°
21
84°
64°
22
82°
60°
23
85°
58°
24
86°
62°
25
87°
64°
26
88°
64°
27
88°
62°
28
86°
62°
29
86°
60°
30
84°
61°
31
86°
62°
1
80°
57°
2
80°
56°
3
81°
55°
4
79°
54°
5
79°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Irvine
Irvine's August 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 54° and 69°. The average high for August is 85° with an average low of 63°. 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 Irvine. See also: September | October | November.
