S
M
T
W
T
F
S
26
80°
44°
27
65°
57°
28
60°
51°
29
61°
42°
30
62°
36°
1
57°
40°
2
58°
40°
3
69°
43°
4
76°
48°
5
55°
46°
6
58°
39°
7
65°
37°
8
62°
46°
9
77°
48°
10
69°
45°
11
71°
44°
12
82°
46°
13
71°
47°
14
72°
40°
15
77°
51°
16
75°
62°
17
84°
62°
18
75°
61°
19
76°
57°
20
71°
49°
21
73°
47°
22
71°
55°
23
76°
55°
24
78°
58°
25
84°
53°
26
84°
57°
27
89°
63°
28
89°
61°
29
86°
56°
30
86°
59°
31
85°
63°
1
82°
56°
2
85°
55°
3
84°
59°
4
86°
65°
5
88°
65°
6
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in McLean
McLean's May 2026 forecast shows daily high temperatures ranging from 82° to 88°, with overnight lows between 55° and 65°. The average high for May is 85° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in McLean. See also: June | July | August.
