S
M
T
W
T
F
S
26
78°
59°
27
79°
55°
28
74°
58°
29
73°
59°
30
73°
59°
31
74°
58°
1
73°
60°
2
79°
60°
3
79°
59°
4
78°
59°
5
72°
58°
6
73°
60°
7
74°
59°
8
74°
58°
9
73°
59°
10
74°
58°
11
71°
57°
12
72°
59°
13
78°
57°
14
72°
54°
15
70°
57°
16
72°
59°
17
73°
59°
18
77°
58°
19
77°
59°
20
76°
57°
21
69°
56°
22
69°
57°
23
71°
58°
24
72°
57°
25
74°
49°
26
76°
46°
27
68°
45°
28
65°
47°
29
67°
48°
30
68°
53°
31
71°
55°
1
74°
56°
2
72°
55°
3
75°
56°
4
71°
49°
5
74°
48°
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 65° to 79°, with overnight lows between 45° and 60°. The average high for August is 73° with an average low of 56°. 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.
