S
M
T
W
T
F
S
28
88°
68°
29
89°
67°
30
80°
65°
1
81°
64°
2
82°
65°
3
82°
70°
4
86°
70°
5
84°
69°
6
84°
71°
7
88°
71°
8
90°
72°
9
91°
72°
10
91°
71°
11
89°
71°
12
90°
72°
13
90°
71°
14
87°
70°
15
86°
72°
16
84°
72°
17
89°
71°
18
87°
72°
19
84°
72°
20
86°
71°
21
84°
72°
22
83°
72°
23
84°
71°
24
84°
70°
25
85°
70°
26
85°
69°
27
86°
67°
28
85°
66°
29
85°
68°
30
86°
71°
31
90°
70°
1
88°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Manassas
Manassas's July 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 64° and 72°. The average high for July is 86° with an average low of 70°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Manassas. See also: August | September | October.
