S
M
T
W
T
F
S
26
86°
72°
27
87°
72°
28
90°
71°
29
88°
72°
30
89°
72°
31
88°
71°
1
89°
71°
2
88°
72°
3
89°
73°
4
91°
72°
5
89°
71°
6
86°
71°
7
88°
72°
8
89°
68°
9
83°
65°
10
82°
65°
11
82°
68°
12
83°
70°
13
83°
70°
14
85°
71°
15
88°
70°
16
84°
69°
17
87°
62°
18
83°
62°
19
83°
67°
20
87°
68°
21
88°
69°
22
87°
68°
23
88°
69°
24
87°
67°
25
85°
66°
26
80°
64°
27
80°
62°
28
79°
62°
29
80°
61°
30
80°
63°
31
83°
66°
1
86°
67°
2
86°
66°
3
85°
62°
4
84°
58°
5
78°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Manassas Park
Manassas Park's August 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 58° and 73°. The average high for August is 85° with an average low of 68°. 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 Manassas Park. See also: September | October | November.