S
M
T
W
T
F
S
28
92°
80°
29
93°
79°
30
93°
78°
1
92°
76°
2
94°
76°
3
94°
76°
4
95°
66°
5
90°
69°
6
90°
69°
7
92°
73°
8
94°
76°
9
97°
75°
10
91°
72°
11
93°
73°
12
92°
71°
13
95°
73°
14
98°
74°
15
100°
72°
16
101°
75°
17
101°
74°
18
94°
71°
19
99°
77°
20
99°
77°
21
100°
77°
22
99°
76°
23
98°
76°
24
98°
75°
25
97°
74°
26
98°
75°
27
98°
76°
28
99°
76°
29
98°
75°
30
99°
76°
31
99°
76°
1
98°
75°
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 90° to 101°, with overnight lows between 69° and 77°. The average high for July is 97° 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.
