S
M
T
W
T
F
S
26
32°
21°
27
37°
21°
28
52°
23°
29
52°
28°
30
57°
32°
1
68°
34°
2
61°
37°
3
70°
37°
4
50°
25°
5
45°
23°
6
61°
19°
7
63°
41°
8
70°
43°
9
63°
46°
10
77°
37°
11
72°
44°
12
74°
40°
13
88°
47°
14
64°
45°
15
61°
45°
16
57°
34°
17
45°
32°
18
41°
25°
19
64°
44°
20
59°
39°
21
59°
39°
22
67°
46°
23
76°
54°
24
82°
56°
25
83°
53°
26
75°
46°
27
67°
50°
28
72°
54°
29
71°
48°
30
68°
49°
31
70°
51°
1
81°
54°
2
68°
47°
3
71°
49°
4
74°
49°
5
71°
50°
6
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Roy
Roy's May 2026 forecast shows daily high temperatures ranging from 59° to 83°, with overnight lows between 39° and 56°. The average high for May is 71° with an average low of 49°. 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 Roy. See also: June | July | August.