S
M
T
W
T
F
S
26
59°
34°
27
70°
34°
28
61°
48°
29
55°
45°
30
48°
34°
1
50°
28°
2
46°
36°
3
54°
34°
4
70°
41°
5
72°
46°
6
46°
41°
7
52°
32°
8
52°
36°
9
55°
36°
10
59°
34°
11
54°
30°
12
59°
28°
13
63°
43°
14
48°
43°
15
63°
39°
16
N/A
17
79°
57°
18
87°
60°
19
86°
63°
20
73°
38°
21
56°
35°
22
61°
45°
23
62°
50°
24
65°
52°
25
66°
50°
26
67°
48°
27
70°
49°
28
69°
50°
29
67°
58°
30
73°
53°
31
72°
52°
1
68°
49°
2
67°
53°
3
65°
53°
4
67°
52°
5
68°
51°
6
69°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in McLean
McLean's May 2026 forecast shows daily high temperatures ranging from 56° to 87°, with overnight lows between 35° and 63°. The average high for May is 69° with an average low of 51°. 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.
