S
M
T
W
T
F
S
28
79°
67°
29
80°
65°
30
85°
65°
1
87°
66°
2
86°
70°
3
84°
63°
4
86°
62°
5
81°
65°
6
83°
63°
7
81°
68°
8
83°
69°
9
88°
66°
10
84°
63°
11
81°
63°
12
81°
64°
13
82°
69°
14
84°
67°
15
83°
64°
16
83°
71°
17
86°
70°
18
89°
63°
19
81°
68°
20
81°
64°
21
82°
63°
22
80°
64°
23
81°
66°
24
81°
65°
25
82°
64°
26
80°
65°
27
81°
64°
28
85°
68°
29
85°
70°
30
81°
69°
31
85°
66°
1
87°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Fairfax
Fairfax's July 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 62° and 71°. The average high for July is 83° 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 July weather will actually feel in Fairfax. See also: August | September | October.
