S
M
T
W
T
F
S
26
89°
52°
27
83°
47°
28
88°
45°
29
71°
48°
30
55°
45°
1
51°
39°
2
59°
39°
3
71°
46°
4
81°
45°
5
71°
42°
6
77°
45°
7
81°
47°
8
77°
50°
9
75°
46°
10
81°
52°
11
83°
53°
12
79°
52°
13
71°
45°
14
71°
44°
15
72°
44°
16
79°
52°
17
83°
54°
18
84°
55°
19
84°
54°
20
82°
55°
21
80°
56°
22
75°
56°
23
76°
54°
24
75°
53°
25
76°
57°
26
77°
56°
27
76°
56°
28
77°
55°
29
78°
58°
30
78°
59°
31
79°
57°
1
79°
56°
2
80°
58°
3
82°
59°
4
83°
60°
5
81°
60°
6
86°
61°
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 51° to 89°, with overnight lows between 39° and 61°. The average high for May is 77° with an average low of 52°. 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.