S
M
T
W
T
F
S
26
58°
43°
27
55°
41°
28
55°
41°
29
57°
43°
30
58°
45°
1
59°
44°
2
61°
43°
3
60°
40°
4
58°
39°
5
58°
40°
6
60°
40°
7
62°
44°
8
65°
46°
9
64°
46°
10
64°
44°
11
63°
42°
12
61°
43°
13
60°
42°
14
61°
43°
15
62°
43°
16
63°
44°
17
64°
46°
18
65°
45°
19
66°
44°
20
65°
44°
21
67°
47°
22
66°
47°
23
68°
54°
24
70°
55°
25
76°
54°
26
75°
53°
27
71°
56°
28
77°
57°
29
79°
51°
30
78°
49°
31
69°
49°
1
68°
50°
2
71°
49°
3
72°
55°
4
78°
57°
5
77°
57°
6
72°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Orange County
Orange County's May 2026 forecast shows daily high temperatures ranging from 55° to 79°, with overnight lows between 39° and 58°. The average high for May is 66° with an average low of 47°. 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 Orange County. See also: June | July | August.
