S
M
T
W
T
F
S
26
80°
54°
27
83°
61°
28
67°
53°
29
66°
48°
30
65°
39°
1
64°
41°
2
64°
39°
3
75°
38°
4
79°
58°
5
65°
43°
6
60°
43°
7
66°
37°
8
75°
46°
9
81°
50°
10
72°
54°
11
74°
44°
12
77°
47°
13
76°
50°
14
74°
42°
15
81°
55°
16
84°
68°
17
82°
65°
18
84°
72°
19
78°
61°
20
67°
57°
21
71°
62°
22
73°
62°
23
79°
62°
24
78°
61°
25
77°
60°
26
78°
61°
27
77°
62°
28
80°
63°
29
78°
62°
30
79°
62°
31
81°
61°
1
80°
57°
2
83°
61°
3
78°
60°
4
76°
56°
5
81°
61°
6
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Koshkonong
Koshkonong's May 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 56° and 63°. The average high for May is 78° with an average low of 61°. 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 Koshkonong. See also: June | July | August.