S
M
T
W
T
F
S
26
73°
51°
27
65°
56°
28
62°
53°
29
62°
45°
30
61°
38°
1
54°
41°
2
N/A
3
64°
49°
4
75°
56°
5
59°
43°
6
59°
40°
7
61°
44°
8
63°
43°
9
68°
45°
10
69°
48°
11
71°
45°
12
68°
47°
13
73°
51°
14
72°
47°
15
73°
47°
16
74°
50°
17
76°
54°
18
73°
55°
19
77°
55°
20
75°
52°
21
77°
47°
22
71°
46°
23
69°
46°
24
71°
48°
25
70°
48°
26
70°
47°
27
72°
48°
28
73°
49°
29
73°
52°
30
76°
57°
31
78°
55°
1
75°
50°
2
77°
53°
3
78°
59°
4
80°
57°
5
81°
59°
6
83°
61°
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 59° to 83°, with overnight lows between 40° and 61°. The average high for May is 72° with an average low of 50°. 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.
