S
M
T
W
T
F
S
26
80°
61°
27
86°
73°
28
79°
70°
29
70°
61°
30
N/A
1
67°
47°
2
72°
47°
3
78°
54°
4
79°
64°
5
75°
54°
6
79°
55°
7
76°
50°
8
77°
57°
9
73°
57°
10
78°
60°
11
82°
62°
12
82°
61°
13
81°
59°
14
71°
56°
15
82°
65°
16
83°
64°
17
83°
65°
18
82°
65°
19
83°
66°
20
83°
66°
21
80°
65°
22
82°
65°
23
79°
64°
24
83°
67°
25
84°
67°
26
79°
63°
27
78°
60°
28
82°
65°
29
84°
66°
30
86°
67°
31
86°
68°
1
87°
68°
2
87°
67°
3
86°
69°
4
88°
67°
5
82°
64°
6
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Royal
Royal's May 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 47° and 69°. The average high for May is 81° with an average low of 62°. 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 Royal. See also: June | July | August.