S
M
T
W
T
F
S
26
56°
42°
27
65°
44°
28
53°
37°
29
58°
37°
30
58°
45°
1
64°
35°
2
69°
36°
3
84°
45°
4
83°
43°
5
55°
43°
6
54°
41°
7
79°
35°
8
76°
47°
9
84°
45°
10
69°
49°
11
81°
45°
12
84°
54°
13
83°
48°
14
93°
59°
15
89°
57°
16
94°
61°
17
96°
63°
18
66°
49°
19
66°
41°
20
66°
42°
21
62°
51°
22
72°
49°
23
75°
45°
24
90°
49°
25
93°
61°
26
86°
57°
27
81°
57°
28
68°
61°
29
84°
62°
30
92°
63°
31
94°
63°
1
93°
63°
2
84°
61°
3
82°
60°
4
85°
61°
5
87°
60°
6
88°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bison
Bison's May 2026 forecast shows daily high temperatures ranging from 68° to 94°, with overnight lows between 60° and 63°. The average high for May is 86° with an average low of 62°. 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 Bison. See also: June | July | August.