S
M
T
W
T
F
S
26
59°
30°
27
61°
26°
28
64°
31°
29
55°
37°
30
60°
39°
1
54°
44°
2
62°
40°
3
48°
33°
4
60°
33°
5
73°
51°
6
64°
54°
7
58°
39°
8
57°
37°
9
59°
44°
10
59°
45°
11
59°
43°
12
56°
38°
13
55°
40°
14
49°
33°
15
59°
44°
16
69°
49°
17
71°
50°
18
72°
47°
19
65°
44°
20
64°
43°
21
63°
45°
22
64°
46°
23
63°
45°
24
64°
45°
25
62°
46°
26
60°
45°
27
63°
46°
28
65°
46°
29
61°
45°
30
62°
46°
31
64°
47°
1
62°
47°
2
65°
46°
3
63°
48°
4
66°
48°
5
62°
47°
6
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ammon
Ammon's May 2026 forecast shows daily high temperatures ranging from 49° to 73°, with overnight lows between 33° and 54°. The average high for May is 63° with an average low of 45°. 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 Ammon. See also: June | July | August.