S
M
T
W
T
F
S
26
89°
63°
27
86°
65°
28
90°
58°
29
92°
61°
30
92°
71°
1
95°
71°
2
85°
66°
3
80°
57°
4
84°
58°
5
87°
57°
6
95°
60°
7
95°
68°
8
95°
73°
9
91°
70°
10
93°
70°
11
94°
70°
12
88°
71°
13
90°
70°
14
90°
67°
15
93°
63°
16
95°
67°
17
93°
73°
18
93°
65°
19
91°
70°
20
93°
67°
21
93°
70°
22
94°
74°
23
92°
71°
24
90°
72°
25
91°
72°
26
92°
72°
27
93°
70°
28
85°
69°
29
86°
70°
30
84°
69°
31
83°
67°
1
84°
66°
2
86°
66°
3
87°
67°
4
88°
68°
5
87°
67°
6
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fort McCoy
Fort McCoy's May 2026 forecast shows daily high temperatures ranging from 83° to 93°, with overnight lows between 65° and 72°. The average high for May is 88° with an average low of 69°. 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 McCoy. See also: June | July | August.