S
M
T
W
T
F
S
26
77°
52°
27
81°
50°
28
73°
58°
29
66°
51°
30
61°
42°
1
63°
36°
2
56°
36°
3
63°
32°
4
77°
49°
5
71°
59°
6
60°
49°
7
63°
44°
8
71°
36°
9
72°
51°
10
77°
51°
11
71°
47°
12
77°
43°
13
75°
52°
14
63°
40°
15
71°
38°
16
82°
55°
17
88°
61°
18
89°
66°
19
87°
67°
20
82°
64°
21
66°
55°
22
71°
57°
23
78°
64°
24
77°
65°
25
74°
65°
26
78°
65°
27
78°
66°
28
82°
60°
29
80°
57°
30
73°
55°
31
74°
54°
1
76°
57°
2
73°
55°
3
75°
56°
4
76°
59°
5
78°
58°
6
76°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in West Irvine
West Irvine's May 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 54° and 66°. The average high for May is 77° with an average low of 60°. 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 West Irvine. See also: June | July | August.