S
M
T
W
T
F
S
26
81°
56°
27
80°
52°
28
83°
54°
29
82°
54°
30
84°
54°
31
85°
52°
1
88°
53°
2
96°
53°
3
91°
54°
4
87°
54°
5
86°
54°
6
80°
52°
7
79°
53°
8
79°
53°
9
84°
53°
10
82°
51°
11
83°
55°
12
75°
57°
13
70°
57°
14
70°
55°
15
74°
53°
16
75°
56°
17
78°
57°
18
79°
59°
19
80°
58°
20
82°
57°
21
85°
58°
22
84°
59°
23
85°
58°
24
81°
55°
25
77°
55°
26
80°
56°
27
81°
58°
28
81°
58°
29
78°
57°
30
82°
58°
31
83°
58°
1
84°
57°
2
83°
58°
3
77°
58°
4
77°
57°
5
79°
57°
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 70° to 85°, with overnight lows between 53° and 59°. The average high for August is 79° with an average low of 57°. 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.
