S
M
T
W
T
F
S
26
87°
70°
27
90°
72°
28
90°
72°
29
89°
71°
30
89°
71°
31
87°
70°
1
85°
71°
2
83°
66°
3
84°
70°
4
84°
69°
5
85°
70°
6
84°
69°
7
84°
69°
8
85°
70°
9
85°
70°
10
82°
69°
11
83°
70°
12
83°
69°
13
84°
69°
14
82°
68°
15
83°
68°
16
82°
66°
17
82°
67°
18
83°
65°
19
82°
65°
20
84°
69°
21
86°
64°
22
82°
61°
23
80°
61°
24
81°
62°
25
82°
65°
26
85°
64°
27
88°
67°
28
89°
68°
29
88°
68°
30
88°
61°
31
82°
60°
1
80°
65°
2
80°
64°
3
84°
60°
4
85°
66°
5
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in McLean
McLean's August 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 60° and 72°. The average high for August is 84° with an average low of 67°. 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 McLean. See also: September | October | November.
