S
M
T
W
T
F
S
26
79°
48°
27
75°
54°
28
64°
49°
29
60°
44°
30
61°
37°
1
61°
36°
2
60°
40°
3
73°
45°
4
82°
50°
5
56°
46°
6
59°
41°
7
68°
40°
8
68°
46°
9
81°
50°
10
69°
42°
11
74°
43°
12
83°
52°
13
74°
53°
14
78°
46°
15
82°
54°
16
81°
66°
17
88°
70°
18
80°
66°
19
73°
48°
20
65°
47°
21
69°
51°
22
76°
56°
23
82°
60°
24
78°
59°
25
78°
58°
26
79°
62°
27
81°
61°
28
80°
62°
29
77°
59°
30
78°
64°
31
81°
65°
1
82°
64°
2
81°
63°
3
73°
59°
4
73°
58°
5
77°
65°
6
80°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fort Madison
Fort Madison's May 2026 forecast shows daily high temperatures ranging from 65° to 88°, with overnight lows between 47° and 70°. The average high for May is 78° with an average low of 60°. 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 Fort Madison. See also: June | July | August.
