S
M
T
W
T
F
S
26
59°
43°
27
59°
41°
28
61°
43°
29
68°
37°
30
72°
41°
1
66°
46°
2
61°
50°
3
54°
46°
4
57°
46°
5
57°
45°
6
54°
44°
7
57°
47°
8
56°
42°
9
55°
37°
10
53°
41°
11
54°
43°
12
53°
42°
13
53°
42°
14
56°
40°
15
55°
43°
16
57°
45°
17
58°
46°
18
57°
45°
19
55°
44°
20
55°
43°
21
56°
45°
22
55°
45°
23
56°
47°
24
56°
46°
25
57°
46°
26
57°
47°
27
58°
45°
28
57°
43°
29
57°
48°
30
58°
48°
31
57°
46°
1
59°
48°
2
60°
49°
3
62°
48°
4
63°
49°
5
63°
49°
6
62°
48°
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 53° to 63°, with overnight lows between 37° and 49°. The average high for May is 57° with an average low of 45°. 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.
