S
M
T
W
T
F
S
26
83°
69°
27
81°
70°
28
80°
70°
29
81°
70°
30
84°
65°
31
86°
67°
1
88°
68°
2
86°
68°
3
85°
69°
4
81°
70°
5
82°
70°
6
83°
71°
7
82°
69°
8
82°
69°
9
81°
70°
10
80°
71°
11
81°
69°
12
79°
68°
13
78°
68°
14
79°
70°
15
79°
70°
16
81°
69°
17
83°
70°
18
83°
71°
19
82°
71°
20
84°
70°
21
84°
71°
22
83°
71°
23
83°
70°
24
84°
71°
25
84°
71°
26
83°
70°
27
84°
71°
28
84°
70°
29
83°
69°
30
83°
70°
31
82°
70°
1
83°
69°
2
83°
70°
3
78°
67°
4
78°
68°
5
83°
70°
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 78° to 88°, with overnight lows between 65° and 71°. The average high for August is 82° with an average low of 70°. 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.
