S
M
T
W
T
F
S
26
61°
52°
27
62°
49°
28
65°
46°
29
64°
46°
30
64°
50°
1
64°
56°
2
64°
56°
3
62°
54°
4
64°
53°
5
66°
53°
6
69°
56°
7
73°
57°
8
73°
58°
9
81°
57°
10
78°
56°
11
80°
56°
12
78°
54°
13
78°
58°
14
81°
59°
15
77°
57°
16
75°
56°
17
74°
55°
18
78°
58°
19
78°
59°
20
77°
58°
21
78°
59°
22
78°
59°
23
79°
58°
24
79°
59°
25
78°
59°
26
77°
58°
27
77°
59°
28
71°
57°
29
70°
56°
30
70°
56°
31
71°
58°
1
72°
59°
2
75°
58°
3
74°
59°
4
73°
58°
5
73°
57°
6
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Aliso Viejo
Aliso Viejo's May 2026 forecast shows daily high temperatures ranging from 64° to 81°, with overnight lows between 53° and 59°. The average high for May is 75° with an average low of 57°. 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 Aliso Viejo. See also: June | July | August.
