S
M
T
W
T
F
S
26
58°
43°
27
71°
38°
28
60°
49°
29
61°
53°
30
67°
42°
1
68°
37°
2
60°
41°
3
62°
43°
4
76°
57°
5
84°
64°
6
75°
54°
7
58°
43°
8
63°
46°
9
62°
46°
10
67°
49°
11
68°
52°
12
68°
50°
13
70°
53°
14
71°
55°
15
72°
53°
16
70°
55°
17
78°
60°
18
78°
60°
19
77°
59°
20
78°
60°
21
78°
60°
22
75°
53°
23
69°
52°
24
69°
53°
25
70°
55°
26
72°
54°
27
71°
54°
28
71°
56°
29
72°
54°
30
72°
59°
31
75°
63°
1
78°
63°
2
73°
59°
3
74°
61°
4
78°
64°
5
79°
64°
6
81°
63°
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 58° to 84°, with overnight lows between 43° and 64°. The average high for May is 72° with an average low of 56°. 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.
