S
M
T
W
T
F
S
26
82°
70°
27
82°
69°
28
85°
70°
29
85°
69°
30
87°
70°
31
87°
70°
1
86°
69°
2
85°
70°
3
86°
64°
4
84°
63°
5
81°
63°
6
80°
64°
7
81°
63°
8
82°
67°
9
86°
68°
10
85°
69°
11
85°
70°
12
81°
67°
13
85°
68°
14
84°
68°
15
Hist. Avg.
87°
66°
16
Hist. Avg.
87°
65°
17
Hist. Avg.
86°
65°
18
Hist. Avg.
86°
65°
19
Hist. Avg.
86°
65°
20
Hist. Avg.
86°
65°
21
Hist. Avg.
86°
65°
22
Hist. Avg.
86°
65°
23
Hist. Avg.
86°
64°
24
Hist. Avg.
86°
64°
25
Hist. Avg.
85°
64°
26
Hist. Avg.
85°
64°
27
Hist. Avg.
85°
64°
28
Hist. Avg.
85°
64°
29
Hist. Avg.
85°
63°
30
Hist. Avg.
84°
63°
31
Hist. Avg.
84°
63°
1
Hist. Avg.
84°
63°
2
Hist. Avg.
84°
62°
3
Hist. Avg.
84°
62°
4
Hist. Avg.
83°
62°
5
Hist. Avg.
83°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Fairfax
Fairfax's August 2026 forecast shows daily high temperatures ranging from 80° to 87°, with overnight lows between 63° and 70°. The average high for August is 84° with an average low of 68°. 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.
