S
M
T
W
T
F
S
26
85°
69°
27
90°
72°
28
91°
69°
29
85°
70°
30
86°
72°
31
88°
71°
1
90°
71°
2
84°
75°
3
89°
75°
4
88°
73°
5
89°
75°
6
91°
75°
7
92°
74°
8
94°
72°
9
94°
72°
10
95°
73°
11
95°
75°
12
86°
70°
13
88°
69°
14
86°
68°
15
83°
67°
16
85°
64°
17
83°
64°
18
82°
65°
19
85°
63°
20
84°
66°
21
88°
68°
22
86°
69°
23
89°
70°
24
90°
70°
25
89°
69°
26
87°
69°
27
83°
68°
28
86°
69°
29
84°
67°
30
85°
68°
31
85°
68°
1
86°
66°
2
79°
61°
3
78°
61°
4
78°
62°
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 78° to 95°, with overnight lows between 60° and 75°. The average high for August is 86° 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.
