S
M
T
W
T
F
S
26
83°
64°
27
81°
63°
28
80°
62°
29
80°
63°
30
81°
64°
31
85°
64°
1
82°
63°
2
81°
62°
3
88°
63°
4
83°
61°
5
81°
61°
6
82°
59°
7
81°
57°
8
80°
56°
9
81°
55°
10
81°
56°
11
83°
63°
12
87°
64°
13
87°
61°
14
86°
56°
15
81°
61°
16
81°
62°
17
82°
55°
18
80°
57°
19
81°
56°
20
81°
56°
21
83°
61°
22
86°
61°
23
86°
59°
24
87°
60°
25
86°
60°
26
87°
61°
27
86°
59°
28
85°
60°
29
85°
60°
30
83°
54°
31
80°
51°
1
78°
51°
2
77°
52°
3
77°
52°
4
78°
53°
5
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fairfax
Fairfax's August 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 51° and 64°. The average high for August is 82° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fairfax. See also: September | October | November.
