S
M
T
W
T
F
S
26
45°
18°
27
43°
21°
28
49°
16°
29
50°
23°
30
57°
23°
1
62°
19°
2
65°
23°
3
67°
24°
4
68°
24°
5
61°
29°
6
64°
25°
7
64°
30°
8
65°
26°
9
63°
23°
10
71°
24°
11
73°
30°
12
79°
28°
13
69°
30°
14
60°
23°
15
57°
22°
16
47°
20°
17
44°
14°
18
52°
22°
19
55°
17°
20
58°
21°
21
60°
28°
22
64°
22°
23
69°
24°
24
77°
47°
25
83°
46°
26
63°
39°
27
67°
43°
28
76°
45°
29
63°
42°
30
66°
39°
31
69°
38°
1
72°
39°
2
80°
41°
3
79°
43°
4
77°
42°
5
78°
40°
6
70°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Banner
Banner's May 2026 forecast shows daily high temperatures ranging from 63° to 83°, with overnight lows between 37° and 47°. The average high for May is 73° with an average low of 42°. 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 Banner. See also: June | July | August.
