S
M
T
W
T
F
S
26
77°
58°
27
78°
55°
28
84°
56°
29
90°
59°
30
93°
63°
1
93°
69°
2
95°
68°
3
97°
67°
4
81°
68°
5
79°
59°
6
89°
60°
7
99°
63°
8
105°
70°
9
99°
70°
10
101°
72°
11
101°
73°
12
97°
67°
13
93°
67°
14
92°
67°
15
93°
66°
16
92°
65°
17
94°
66°
18
91°
67°
19
89°
66°
20
87°
64°
21
88°
66°
22
89°
65°
23
90°
66°
24
89°
67°
25
87°
62°
26
84°
61°
27
82°
61°
28
83°
62°
29
85°
62°
30
85°
63°
31
84°
63°
1
86°
65°
2
90°
67°
3
93°
69°
4
92°
71°
5
96°
72°
6
96°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bannock
Bannock's May 2026 forecast shows daily high temperatures ranging from 82° to 101°, with overnight lows between 61° and 74°. The average high for May is 91° 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 Bannock. See also: June | July | August.