S
M
T
W
T
F
S
28
92°
80°
29
93°
79°
30
93°
78°
1
92°
75°
2
93°
75°
3
91°
74°
4
94°
72°
5
92°
73°
6
93°
72°
7
94°
73°
8
95°
74°
9
93°
70°
10
92°
70°
11
95°
72°
12
98°
73°
13
98°
74°
14
94°
70°
15
96°
72°
16
88°
68°
17
97°
75°
18
99°
76°
19
99°
77°
20
100°
77°
21
99°
76°
22
99°
77°
23
101°
77°
24
100°
78°
25
100°
78°
26
99°
77°
27
100°
77°
28
100°
76°
29
99°
76°
30
100°
75°
31
99°
75°
1
96°
74°
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 88° to 101°, with overnight lows between 68° and 78°. The average high for July is 96° with an average low of 74°. 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.
