S
M
T
W
T
F
S
26
85°
66°
27
89°
71°
28
90°
71°
29
91°
69°
30
90°
64°
31
84°
64°
1
84°
66°
2
85°
65°
3
84°
64°
4
85°
65°
5
85°
65°
6
86°
69°
7
86°
70°
8
84°
70°
9
84°
69°
10
85°
70°
11
84°
69°
12
90°
68°
13
85°
68°
14
84°
69°
15
89°
66°
16
88°
69°
17
87°
62°
18
83°
62°
19
83°
63°
20
84°
62°
21
83°
63°
22
86°
64°
23
88°
64°
24
87°
66°
25
88°
67°
26
86°
67°
27
83°
61°
28
82°
61°
29
Hist. Avg.
86°
69°
30
Hist. Avg.
86°
69°
31
Hist. Avg.
86°
69°
1
Hist. Avg.
85°
69°
2
Hist. Avg.
85°
68°
3
Hist. Avg.
85°
68°
4
Hist. Avg.
85°
68°
5
Hist. Avg.
84°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in McLean
McLean's August 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 61° and 71°. The average high for August is 86° with an average low of 66°. 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.
