S
M
T
W
T
F
S
26
76°
54°
27
77°
55°
28
77°
57°
29
80°
56°
30
83°
57°
31
83°
58°
1
82°
57°
2
78°
56°
3
77°
56°
4
78°
54°
5
77°
54°
6
78°
55°
7
77°
53°
8
76°
53°
9
77°
54°
10
77°
54°
11
78°
55°
12
80°
54°
13
82°
55°
14
81°
57°
15
83°
57°
16
83°
56°
17
82°
57°
18
84°
58°
19
83°
57°
20
83°
58°
21
84°
57°
22
84°
56°
23
80°
58°
24
84°
58°
25
84°
57°
26
83°
58°
27
84°
58°
28
84°
56°
29
81°
55°
30
79°
55°
31
79°
58°
1
82°
59°
2
84°
59°
3
84°
56°
4
78°
58°
5
79°
55°
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 76° to 84°, with overnight lows between 53° and 59°. The average high for August is 81° with an average low of 56°. 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.
