S
M
T
W
T
F
S
26
78°
69°
27
80°
69°
28
82°
70°
29
83°
71°
30
82°
71°
31
82°
70°
1
81°
70°
2
81°
69°
3
82°
69°
4
82°
70°
5
81°
70°
6
79°
69°
7
77°
69°
8
77°
70°
9
81°
68°
10
83°
69°
11
83°
68°
12
82°
66°
13
81°
64°
14
79°
65°
15
78°
70°
16
80°
70°
17
83°
71°
18
85°
70°
19
85°
69°
20
84°
67°
21
84°
65°
22
82°
66°
23
80°
65°
24
79°
66°
25
79°
68°
26
82°
70°
27
83°
70°
28
84°
69°
29
83°
68°
30
84°
67°
31
83°
69°
1
84°
70°
2
84°
71°
3
83°
70°
4
83°
70°
5
82°
69°
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 77° to 85°, with overnight lows between 64° and 71°. The average high for August is 82° 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 Irvine. See also: September | October | November.
