S
M
T
W
T
F
S
26
60°
46°
27
60°
50°
28
58°
40°
29
59°
39°
30
57°
40°
1
53°
38°
2
53°
39°
3
60°
42°
4
59°
43°
5
60°
44°
6
75°
53°
7
58°
38°
8
57°
39°
9
57°
38°
10
59°
46°
11
59°
50°
12
64°
50°
13
61°
45°
14
59°
44°
15
59°
43°
16
60°
42°
17
61°
44°
18
60°
42°
19
61°
43°
20
62°
43°
21
64°
48°
22
68°
53°
23
65°
46°
24
63°
45°
25
63°
45°
26
64°
46°
27
65°
49°
28
66°
48°
29
68°
52°
30
67°
54°
31
70°
54°
1
74°
56°
2
77°
58°
3
75°
59°
4
77°
58°
5
80°
59°
6
70°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oshkosh
Oshkosh's May 2026 forecast shows daily high temperatures ranging from 53° to 80°, with overnight lows between 38° and 61°. The average high for May is 64° with an average low of 47°. 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 Oshkosh. See also: June | July | August.
