S
M
T
W
T
F
S
28
92°
76°
29
93°
75°
30
94°
76°
1
90°
73°
2
90°
74°
3
92°
76°
4
78°
76°
5
89°
72°
6
92°
80°
7
92°
76°
8
93°
75°
9
92°
76°
10
91°
76°
11
90°
76°
12
85°
74°
13
82°
74°
14
83°
74°
15
91°
75°
16
91°
76°
17
93°
75°
18
93°
74°
19
91°
75°
20
93°
76°
21
94°
75°
22
92°
74°
23
90°
74°
24
90°
75°
25
89°
76°
26
90°
77°
27
94°
79°
28
91°
79°
29
91°
78°
30
90°
79°
31
91°
79°
1
92°
78°
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 83° to 94°, with overnight lows between 74° and 79°. The average high for July is 91° with an average low of 76°. 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.
