S
M
T
W
T
F
S
26
57°
29°
27
58°
25°
28
60°
25°
29
62°
26°
30
63°
29°
1
67°
25°
2
75°
31°
3
77°
34°
4
77°
33°
5
67°
44°
6
68°
27°
7
75°
52°
8
77°
47°
9
72°
41°
10
82°
36°
11
84°
42°
12
89°
45°
13
89°
49°
14
70°
43°
15
68°
36°
16
63°
39°
17
55°
32°
18
60°
30°
19
66°
23°
20
70°
31°
21
66°
41°
22
73°
31°
23
81°
33°
24
85°
47°
25
87°
56°
26
78°
45°
27
71°
46°
28
81°
51°
29
67°
48°
30
73°
47°
31
81°
48°
1
79°
47°
2
81°
51°
3
83°
51°
4
79°
50°
5
81°
51°
6
74°
44°
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 67° to 87°, with overnight lows between 44° and 56°. The average high for May is 79° with an average low of 49°. 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.