S
M
T
W
T
F
S
26
60°
44°
27
68°
51°
28
64°
50°
29
57°
39°
30
56°
38°
1
50°
36°
2
56°
32°
3
67°
45°
4
81°
49°
5
60°
46°
6
58°
42°
7
61°
36°
8
65°
43°
9
76°
49°
10
62°
45°
11
56°
44°
12
74°
44°
13
59°
44°
14
65°
42°
15
76°
55°
16
83°
63°
17
87°
67°
18
80°
66°
19
79°
61°
20
61°
50°
21
61°
50°
22
67°
53°
23
76°
59°
24
82°
59°
25
86°
63°
26
86°
66°
27
81°
62°
28
75°
56°
29
73°
56°
30
69°
52°
31
70°
55°
1
75°
59°
2
75°
58°
3
77°
58°
4
76°
59°
5
75°
54°
6
76°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in McCook
McCook's May 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 52° and 66°. The average high for May is 77° with an average low of 58°. 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 McCook. See also: June | July | August.
