S
M
T
W
T
F
S
26
83°
66°
27
90°
71°
28
82°
65°
29
82°
59°
30
82°
61°
31
81°
63°
1
74°
68°
2
78°
65°
3
81°
64°
4
82°
61°
5
83°
61°
6
77°
68°
7
87°
66°
8
87°
71°
9
85°
69°
10
90°
75°
11
88°
66°
12
76°
67°
13
85°
66°
14
79°
69°
15
82°
71°
16
87°
69°
17
80°
66°
18
82°
63°
19
81°
66°
20
81°
65°
21
82°
61°
22
79°
64°
23
78°
59°
24
77°
54°
25
79°
54°
26
84°
61°
27
82°
64°
28
81°
61°
29
83°
62°
30
88°
66°
31
91°
67°
1
94°
68°
2
94°
69°
3
95°
68°
4
92°
66°
5
89°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rockville
Rockville's August 2026 forecast shows daily high temperatures ranging from 83° to 95°, with overnight lows between 62° and 69°. The average high for August is 91° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Rockville. See also: September | October | November.
