S
M
T
W
T
F
S
26
90°
73°
27
91°
65°
28
91°
67°
29
92°
69°
30
98°
68°
31
94°
74°
1
97°
67°
2
93°
67°
3
92°
68°
4
89°
66°
5
90°
67°
6
90°
66°
7
91°
66°
8
91°
69°
9
92°
69°
10
94°
71°
11
96°
72°
12
94°
72°
13
97°
71°
14
97°
65°
15
96°
66°
16
90°
69°
17
94°
71°
18
95°
70°
19
97°
70°
20
96°
71°
21
91°
68°
22
94°
68°
23
93°
69°
24
94°
69°
25
95°
68°
26
95°
68°
27
94°
69°
28
94°
68°
29
93°
68°
30
93°
67°
31
92°
67°
1
91°
66°
2
93°
67°
3
92°
61°
4
92°
59°
5
84°
59°
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 84° to 98°, with overnight lows between 59° and 74°. The average high for August is 93° 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.
