S
M
T
W
T
F
S
26
79°
62°
27
78°
61°
28
77°
62°
29
78°
62°
30
76°
61°
31
76°
60°
1
72°
60°
2
72°
59°
3
73°
59°
4
72°
60°
5
72°
60°
6
73°
59°
7
72°
61°
8
73°
60°
9
72°
61°
10
72°
59°
11
78°
54°
12
73°
54°
13
71°
60°
14
75°
59°
15
78°
56°
16
71°
59°
17
73°
60°
18
78°
60°
19
77°
59°
20
77°
58°
21
75°
52°
22
70°
51°
23
72°
52°
24
70°
52°
25
74°
55°
26
76°
56°
27
74°
57°
28
76°
54°
29
74°
54°
30
74°
51°
31
71°
56°
1
72°
51°
2
73°
50°
3
66°
55°
4
71°
54°
5
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arlington
Arlington's August 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 50° and 62°. The average high for August is 74° 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 Arlington. See also: September | October | November.
