S
M
T
W
T
F
S
26
85°
71°
27
88°
74°
28
82°
69°
29
69°
59°
30
64°
58°
1
65°
55°
2
74°
50°
3
81°
54°
4
81°
59°
5
85°
61°
6
61°
55°
7
72°
52°
8
80°
58°
9
86°
65°
10
78°
64°
11
76°
60°
12
80°
54°
13
87°
58°
14
90°
65°
15
87°
69°
16
87°
71°
17
88°
74°
18
90°
74°
19
79°
66°
20
76°
66°
21
74°
65°
22
80°
66°
23
80°
65°
24
78°
66°
25
82°
68°
26
83°
69°
27
84°
68°
28
83°
68°
29
84°
67°
30
82°
66°
31
85°
67°
1
84°
70°
2
85°
70°
3
84°
67°
4
82°
64°
5
83°
68°
6
85°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cooper
Cooper's May 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 64° and 74°. The average high for May is 82° with an average low of 68°. 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 Cooper. See also: June | July | August.