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
93°
74°
9
94°
76°
10
93°
71°
11
89°
71°
12
87°
74°
13
90°
76°
14
85°
79°
15
89°
74°
16
81°
72°
17
94°
74°
18
89°
75°
19
90°
70°
20
92°
68°
21
84°
65°
22
79°
68°
23
87°
67°
24
85°
65°
25
85°
64°
26
86°
67°
27
88°
74°
28
90°
74°
29
85°
68°
30
89°
69°
31
92°
71°
1
96°
73°
2
98°
73°
3
95°
69°
4
88°
66°
5
84°
63°
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 84° to 98°, with overnight lows between 63° and 73°. The average high for August is 91° with an average low of 69°. 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.
