S
M
T
W
T
F
S
27
66°
61°
28
71°
61°
29
74°
64°
30
80°
61°
1
83°
64°
2
86°
64°
3
67°
59°
4
65°
61°
5
74°
58°
6
66°
50°
7
72°
49°
8
81°
58°
9
77°
53°
10
72°
54°
11
67°
62°
12
76°
60°
13
82°
58°
14
90°
65°
15
77°
61°
16
80°
61°
17
62°
48°
18
62°
43°
19
69°
42°
20
72°
47°
21
68°
49°
22
69°
46°
23
64°
38°
24
62°
40°
25
64°
41°
26
71°
43°
27
69°
46°
28
62°
47°
29
68°
46°
30
67°
44°
31
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in McLean
McLean's October 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 38° and 47°. The average high for October is 65° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in McLean. See also: November | December | January.
