S
M
T
W
T
F
S
26
52°
40°
27
51°
42°
28
55°
36°
29
53°
31°
30
52°
30°
1
55°
35°
2
67°
29°
3
71°
43°
4
60°
37°
5
50°
29°
6
45°
26°
7
60°
24°
8
72°
30°
9
60°
42°
10
59°
34°
11
67°
34°
12
66°
52°
13
73°
38°
14
80°
39°
15
85°
51°
16
76°
50°
17
68°
49°
18
61°
49°
19
53°
38°
20
62°
32°
21
67°
35°
22
52°
47°
23
62°
46°
24
80°
57°
25
85°
63°
26
85°
61°
27
85°
56°
28
81°
57°
29
80°
57°
30
78°
55°
31
75°
56°
1
79°
57°
2
78°
56°
3
79°
58°
4
78°
60°
5
74°
53°
6
72°
59°
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 62° to 85°, with overnight lows between 46° and 63°. The average high for May is 78° with an average low of 57°. 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.
