S
M
T
W
T
F
S
26
72°
54°
27
82°
50°
28
75°
59°
29
68°
52°
30
59°
41°
1
66°
39°
2
59°
40°
3
64°
51°
4
73°
59°
5
78°
59°
6
67°
43°
7
54°
35°
8
58°
43°
9
65°
45°
10
67°
47°
11
70°
51°
12
72°
50°
13
69°
51°
14
63°
50°
15
72°
55°
16
71°
54°
17
73°
56°
18
77°
57°
19
78°
57°
20
76°
58°
21
79°
58°
22
79°
57°
23
78°
57°
24
74°
56°
25
76°
58°
26
79°
59°
27
79°
57°
28
74°
58°
29
77°
59°
30
74°
55°
31
77°
59°
1
76°
59°
2
79°
61°
3
81°
58°
4
75°
55°
5
74°
54°
6
75°
54°
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 54° to 81°, with overnight lows between 35° and 61°. The average high for May is 72° with an average low of 53°. 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.
