S
M
T
W
T
F
S
26
61°
33°
27
67°
38°
28
62°
38°
29
51°
35°
30
48°
35°
1
42°
33°
2
49°
34°
3
49°
29°
4
59°
35°
5
50°
37°
6
44°
31°
7
47°
34°
8
53°
31°
9
53°
38°
10
50°
35°
11
51°
31°
12
49°
29°
13
46°
40°
14
63°
37°
15
66°
32°
16
71°
48°
17
65°
42°
18
70°
47°
19
70°
42°
20
53°
39°
21
54°
35°
22
65°
36°
23
62°
48°
24
57°
45°
25
61°
46°
26
78°
50°
27
71°
48°
28
66°
46°
29
N/A
30
71°
47°
31
73°
49°
1
73°
46°
2
78°
50°
3
77°
49°
4
76°
52°
5
71°
50°
6
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Rockville
Rockville's May 2026 forecast shows daily high temperatures ranging from 69° to 78°, with overnight lows between 46° and 52°. The average high for May is 74° with an average low of 49°. 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.
