S
M
T
W
T
F
S
26
85°
68°
27
84°
67°
28
88°
68°
29
87°
66°
30
85°
68°
31
91°
70°
1
91°
69°
2
86°
66°
3
85°
65°
4
84°
68°
5
84°
69°
6
86°
69°
7
86°
68°
8
85°
69°
9
85°
66°
10
86°
68°
11
88°
68°
12
84°
67°
13
85°
69°
14
89°
69°
15
90°
68°
16
88°
68°
17
86°
67°
18
87°
68°
19
84°
68°
20
89°
67°
21
86°
68°
22
83°
67°
23
82°
66°
24
81°
67°
25
83°
67°
26
84°
66°
27
83°
66°
28
83°
63°
29
89°
66°
30
88°
65°
31
85°
64°
1
86°
64°
2
87°
65°
3
86°
64°
4
86°
63°
5
84°
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 81° to 91°, with overnight lows between 62° and 70°. The average high for August is 86° 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 August weather will actually feel in Rockville. See also: September | October | November.
