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
82°
64°
17
86°
66°
18
76°
63°
19
68°
49°
20
67°
46°
21
68°
52°
22
63°
54°
23
72°
57°
24
77°
62°
25
76°
61°
26
79°
64°
27
78°
63°
28
80°
62°
29
79°
63°
30
80°
62°
31
79°
63°
1
78°
59°
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 63° to 81°, with overnight lows between 46° and 65°. The average high for May is 75° with an average low of 59°. 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.
