S
M
T
W
T
F
S
26
60°
41°
27
70°
41°
28
58°
51°
29
53°
40°
30
45°
37°
1
40°
32°
2
45°
28°
3
56°
43°
4
68°
55°
5
65°
46°
6
51°
37°
7
50°
35°
8
51°
37°
9
54°
43°
10
60°
42°
11
59°
42°
12
57°
43°
13
60°
46°
14
61°
48°
15
64°
45°
16
70°
51°
17
73°
52°
18
72°
50°
19
68°
47°
20
74°
51°
21
71°
51°
22
66°
43°
23
63°
43°
24
64°
44°
25
64°
45°
26
65°
45°
27
65°
46°
28
66°
44°
29
66°
44°
30
67°
46°
31
70°
52°
1
67°
49°
2
69°
48°
3
70°
55°
4
72°
53°
5
70°
52°
6
78°
57°
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 45° to 78°, with overnight lows between 28° and 57°. The average high for May is 64° with an average low of 46°. 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.
