S
M
T
W
T
F
S
26
85°
66°
27
82°
61°
28
82°
60°
29
83°
66°
30
84°
61°
31
83°
66°
1
87°
61°
2
84°
60°
3
83°
59°
4
80°
58°
5
81°
59°
6
81°
59°
7
82°
58°
8
82°
60°
9
83°
65°
10
81°
63°
11
83°
65°
12
85°
66°
13
85°
66°
14
88°
62°
15
88°
58°
16
82°
59°
17
81°
64°
18
83°
59°
19
86°
57°
20
80°
56°
21
80°
56°
22
81°
57°
23
82°
61°
24
86°
63°
25
87°
61°
26
87°
57°
27
81°
57°
28
79°
56°
29
79°
62°
30
82°
62°
31
86°
63°
1
85°
61°
2
85°
60°
3
83°
61°
4
80°
60°
5
79°
60°
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 79° to 88°, with overnight lows between 56° and 66°. The average high for August is 83° 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 McLean. See also: September | October | November.
