S
M
T
W
T
F
S
26
70°
47°
27
65°
54°
28
60°
50°
29
61°
41°
30
59°
34°
1
52°
38°
2
52°
36°
3
61°
36°
4
73°
48°
5
59°
44°
6
56°
41°
7
59°
34°
8
63°
46°
9
70°
49°
10
65°
48°
11
67°
40°
12
76°
39°
13
63°
44°
14
65°
36°
15
69°
43°
16
73°
58°
17
81°
60°
18
80°
64°
19
82°
63°
20
64°
53°
21
66°
51°
22
68°
51°
23
71°
54°
24
71°
53°
25
78°
46°
26
74°
54°
27
78°
61°
28
81°
56°
29
80°
56°
30
80°
53°
31
77°
57°
1
80°
56°
2
78°
55°
3
77°
55°
4
81°
62°
5
83°
61°
6
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ames
Ames's May 2026 forecast shows daily high temperatures ranging from 77° to 83°, with overnight lows between 53° and 62°. The average high for May is 80° with an average low of 57°. 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 Ames. See also: June | July | August.