S
M
T
W
T
F
S
26
86°
64°
27
86°
72°
28
86°
72°
29
75°
61°
30
64°
59°
1
59°
54°
2
73°
50°
3
79°
46°
4
79°
54°
5
82°
64°
6
79°
54°
7
70°
52°
8
79°
57°
9
77°
63°
10
82°
64°
11
77°
61°
12
81°
52°
13
87°
62°
14
88°
65°
15
90°
68°
16
87°
71°
17
86°
71°
18
89°
71°
19
84°
67°
20
77°
66°
21
81°
65°
22
85°
62°
23
84°
62°
24
88°
64°
25
86°
64°
26
87°
65°
27
87°
69°
28
89°
68°
29
88°
69°
30
83°
69°
31
86°
68°
1
84°
69°
2
84°
70°
3
87°
70°
4
89°
69°
5
90°
71°
6
86°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sibley
Sibley's May 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 62° and 71°. The average high for May is 86° with an average low of 67°. 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 Sibley. See also: June | July | August.