S
M
T
W
T
F
S
26
95°
70°
27
95°
73°
28
89°
70°
29
90°
70°
30
87°
73°
31
75°
65°
1
86°
64°
2
84°
61°
3
85°
68°
4
77°
56°
5
79°
50°
6
81°
58°
7
79°
60°
8
80°
52°
9
84°
65°
10
83°
63°
11
84°
63°
12
83°
64°
13
80°
60°
14
78°
66°
15
75°
60°
16
79°
59°
17
78°
60°
18
81°
62°
19
82°
62°
20
84°
61°
21
82°
60°
22
81°
63°
23
78°
58°
24
78°
63°
25
80°
62°
26
82°
63°
27
82°
62°
28
79°
59°
29
74°
56°
30
71°
54°
31
72°
58°
1
73°
60°
2
75°
61°
3
79°
60°
4
79°
61°
5
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Annandale
Annandale's August 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 54° and 66°. The average high for August is 79° with an average low of 61°. 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 Annandale. See also: September | October | November.