S
M
T
W
T
F
S
31
86°
68°
1
89°
66°
2
84°
60°
3
80°
61°
4
84°
66°
5
83°
68°
6
81°
68°
7
82°
69°
8
85°
70°
9
86°
68°
10
87°
67°
11
85°
66°
12
83°
66°
13
85°
67°
14
84°
63°
15
88°
62°
16
81°
62°
17
78°
63°
18
79°
67°
19
80°
68°
20
80°
68°
21
84°
69°
22
83°
68°
23
82°
66°
24
85°
69°
25
85°
70°
26
88°
70°
27
87°
69°
28
88°
70°
29
87°
70°
30
86°
69°
1
85°
71°
2
87°
71°
3
89°
70°
4
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Rockville
Rockville's June 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 60° and 71°. The average high for June is 84° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Rockville. See also: July | August | September.