S
M
T
W
T
F
S
26
87°
63°
27
88°
72°
28
87°
73°
29
77°
63°
30
66°
57°
1
58°
54°
2
73°
50°
3
80°
46°
4
80°
56°
5
80°
64°
6
80°
54°
7
73°
52°
8
75°
57°
9
73°
62°
10
83°
66°
11
75°
59°
12
81°
52°
13
85°
53°
14
85°
59°
15
90°
69°
16
87°
67°
17
85°
71°
18
83°
70°
19
85°
65°
20
76°
63°
21
81°
60°
22
82°
63°
23
83°
65°
24
83°
67°
25
86°
64°
26
84°
65°
27
86°
66°
28
87°
63°
29
86°
67°
30
82°
66°
31
84°
65°
1
83°
66°
2
83°
67°
3
86°
67°
4
89°
68°
5
89°
68°
6
84°
67°
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 76° to 90°, with overnight lows between 60° and 71°. The average high for May is 85° with an average low of 66°. 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.