S
M
T
W
T
F
S
26
66°
56°
27
67°
57°
28
71°
54°
29
71°
55°
30
71°
57°
1
75°
61°
2
72°
60°
3
70°
58°
4
67°
58°
5
68°
60°
6
72°
60°
7
77°
61°
8
75°
60°
9
73°
60°
10
72°
62°
11
74°
60°
12
75°
62°
13
71°
59°
14
67°
55°
15
66°
55°
16
67°
56°
17
67°
56°
18
68°
57°
19
67°
56°
20
67°
57°
21
74°
61°
22
74°
63°
23
75°
62°
24
74°
61°
25
74°
62°
26
73°
62°
27
74°
60°
28
72°
59°
29
72°
58°
30
68°
57°
31
67°
57°
1
68°
58°
2
70°
59°
3
72°
61°
4
74°
61°
5
73°
62°
6
72°
62°
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 66° to 77°, with overnight lows between 55° and 63°. The average high for May is 71° with an average low of 59°. 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.
