S
M
T
W
T
F
S
26
61°
41°
27
71°
35°
28
60°
39°
29
62°
48°
30
61°
45°
1
63°
36°
2
59°
44°
3
59°
40°
4
71°
49°
5
78°
58°
6
65°
44°
7
54°
40°
8
56°
38°
9
55°
40°
10
62°
39°
11
60°
41°
12
63°
42°
13
61°
46°
14
62°
47°
15
65°
46°
16
67°
47°
17
75°
51°
18
76°
52°
19
75°
51°
20
75°
53°
21
74°
52°
22
74°
46°
23
66°
44°
24
66°
45°
25
67°
46°
26
68°
46°
27
68°
47°
28
69°
47°
29
68°
46°
30
69°
47°
31
70°
56°
1
72°
53°
2
71°
48°
3
71°
53°
4
75°
55°
5
72°
52°
6
76°
56°
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 54° to 78°, with overnight lows between 38° and 58°. The average high for May is 68° with an average low of 48°. 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.
