S
M
T
W
T
F
S
26
72°
54°
27
82°
50°
28
75°
59°
29
68°
52°
30
59°
41°
1
61°
39°
2
55°
34°
3
63°
32°
4
77°
50°
5
72°
59°
6
61°
46°
7
63°
39°
8
70°
37°
9
75°
53°
10
79°
50°
11
67°
43°
12
70°
56°
13
75°
46°
14
62°
43°
15
69°
50°
16
78°
58°
17
81°
59°
18
83°
60°
19
78°
59°
20
80°
58°
21
80°
59°
22
81°
53°
23
79°
58°
24
76°
57°
25
80°
58°
26
80°
59°
27
79°
59°
28
81°
60°
29
82°
60°
30
82°
59°
31
81°
59°
1
77°
57°
2
79°
58°
3
82°
61°
4
81°
61°
5
78°
60°
6
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Irvine
Irvine's May 2026 forecast shows daily high temperatures ranging from 62° to 83°, with overnight lows between 43° and 61°. The average high for May is 78° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Irvine. See also: June | July | August.
