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
95°
73°
11
89°
73°
12
86°
70°
13
90°
74°
14
83°
65°
15
83°
65°
16
85°
66°
17
83°
65°
18
82°
63°
19
85°
63°
20
86°
65°
21
88°
67°
22
89°
66°
23
85°
65°
24
81°
63°
25
81°
66°
26
85°
66°
27
87°
69°
28
88°
69°
29
87°
67°
30
80°
63°
31
80°
67°
1
79°
67°
2
79°
66°
3
81°
66°
4
82°
68°
5
85°
67°
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 79° to 95°, with overnight lows between 63° and 74°. The average high for August is 85° 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.
