S
M
T
W
T
F
S
26
84°
61°
27
77°
59°
28
68°
54°
29
86°
61°
30
81°
63°
1
70°
57°
2
73°
50°
3
73°
45°
4
81°
46°
5
84°
54°
6
88°
63°
7
81°
63°
8
73°
59°
9
73°
61°
10
84°
61°
11
86°
63°
12
73°
63°
13
82°
61°
14
81°
59°
15
79°
54°
16
88°
55°
17
91°
66°
18
90°
63°
19
90°
67°
20
91°
66°
21
90°
67°
22
93°
67°
23
88°
67°
24
86°
66°
25
89°
65°
26
88°
66°
27
85°
64°
28
86°
65°
29
85°
62°
30
84°
61°
31
86°
62°
1
85°
60°
2
89°
64°
3
86°
63°
4
82°
64°
5
83°
63°
6
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rockville
Rockville's May 2026 forecast shows daily high temperatures ranging from 82° to 93°, with overnight lows between 60° and 67°. The average high for May is 87° with an average low of 64°. 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 Rockville. See also: June | July | August.
