S
M
T
W
T
F
S
26
70°
50°
27
66°
46°
28
55°
41°
29
61°
39°
30
55°
30°
1
57°
30°
2
64°
27°
3
73°
43°
4
79°
39°
5
57°
43°
6
57°
30°
7
70°
34°
8
79°
37°
9
70°
36°
10
72°
32°
11
81°
39°
12
79°
48°
13
77°
43°
14
79°
43°
15
87°
60°
16
83°
64°
17
87°
64°
18
83°
49°
19
67°
46°
20
70°
47°
21
73°
51°
22
79°
52°
23
74°
55°
24
76°
57°
25
77°
58°
26
78°
62°
27
79°
60°
28
76°
54°
29
70°
52°
30
71°
52°
31
72°
54°
1
72°
51°
2
73°
56°
3
73°
61°
4
82°
62°
5
82°
63°
6
83°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Casey
Casey's May 2026 forecast shows daily high temperatures ranging from 67° to 87°, with overnight lows between 46° and 64°. The average high for May is 77° with an average low of 56°. 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 Casey. See also: June | July | August.