S
M
T
W
T
F
S
26
77°
54°
27
75°
50°
28
63°
48°
29
59°
41°
30
63°
39°
1
63°
37°
2
61°
39°
3
75°
46°
4
84°
50°
5
57°
46°
6
59°
39°
7
70°
37°
8
72°
45°
9
82°
50°
10
70°
41°
11
77°
50°
12
82°
54°
13
77°
48°
14
79°
46°
15
88°
59°
16
86°
63°
17
84°
63°
18
77°
63°
19
66°
50°
20
64°
48°
21
68°
52°
22
68°
55°
23
79°
55°
24
81°
52°
25
84°
57°
26
82°
57°
27
88°
59°
28
88°
66°
29
85°
67°
30
78°
63°
31
82°
66°
1
85°
61°
2
85°
57°
3
88°
61°
4
90°
66°
5
90°
63°
6
87°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rathbun
Rathbun's May 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 57° and 67°. The average high for May is 86° with an average low of 63°. 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 Rathbun. See also: June | July | August.