S
M
T
W
T
F
S
26
62°
40°
27
71°
37°
28
66°
37°
29
65°
47°
30
58°
46°
1
63°
39°
2
59°
44°
3
58°
39°
4
73°
36°
5
83°
46°
6
71°
53°
7
62°
44°
8
60°
40°
9
55°
44°
10
68°
44°
11
61°
43°
12
66°
35°
13
66°
41°
14
64°
47°
15
66°
43°
16
78°
40°
17
89°
54°
18
92°
57°
19
95°
68°
20
85°
54°
21
63°
44°
22
65°
47°
23
51°
47°
24
61°
53°
25
70°
56°
26
74°
59°
27
75°
56°
28
73°
55°
29
73°
55°
30
75°
58°
31
77°
60°
1
80°
55°
2
70°
53°
3
68°
53°
4
70°
57°
5
74°
56°
6
74°
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 51° to 95°, with overnight lows between 44° and 68°. The average high for May is 72° with an average low of 55°. 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.
