S
M
T
W
T
F
S
26
77°
58°
27
78°
55°
28
84°
56°
29
90°
59°
30
93°
63°
1
86°
62°
2
88°
64°
3
86°
58°
4
76°
49°
5
70°
54°
6
81°
62°
7
89°
65°
8
91°
66°
9
87°
64°
10
87°
67°
11
89°
65°
12
90°
66°
13
91°
67°
14
86°
63°
15
79°
57°
16
80°
58°
17
80°
58°
18
81°
59°
19
81°
58°
20
80°
59°
21
82°
60°
22
85°
63°
23
89°
63°
24
83°
61°
25
83°
61°
26
84°
62°
27
87°
65°
28
88°
64°
29
88°
64°
30
85°
65°
31
86°
63°
1
86°
63°
2
87°
64°
3
87°
66°
4
89°
67°
5
90°
69°
6
88°
65°
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 70° to 91°, with overnight lows between 49° and 69°. The average high for May is 85° 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 Bannock. See also: June | July | August.