S
M
T
W
T
F
S
26
85°
68°
27
89°
73°
28
91°
70°
29
87°
66°
30
87°
65°
31
90°
68°
1
91°
70°
2
89°
67°
3
88°
69°
4
91°
69°
5
91°
68°
6
92°
67°
7
89°
70°
8
89°
71°
9
88°
70°
10
88°
70°
11
83°
67°
12
83°
69°
13
84°
70°
14
88°
70°
15
88°
69°
16
87°
70°
17
83°
68°
18
83°
67°
19
84°
68°
20
86°
69°
21
87°
69°
22
86°
68°
23
86°
69°
24
85°
68°
25
88°
69°
26
89°
70°
27
88°
69°
28
87°
68°
29
82°
68°
30
80°
67°
31
84°
67°
1
86°
66°
2
85°
67°
3
86°
63°
4
80°
65°
5
82°
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 92°, with overnight lows between 63° and 73°. The average high for August is 87° with an average low of 68°. 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.
