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
78°
68°
23
85°
60°
24
84°
59°
25
81°
61°
26
83°
65°
27
82°
67°
28
83°
63°
29
84°
65°
30
81°
64°
31
80°
61°
1
87°
60°
2
79°
59°
3
77°
60°
4
84°
66°
5
82°
61°
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 77° to 87°, with overnight lows between 59° and 68°. The average high for August is 82° with an average low of 63°. 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.
