S
M
T
W
T
F
S
26
58°
39°
27
57°
43°
28
55°
39°
29
55°
39°
30
56°
39°
1
55°
41°
2
65°
40°
3
64°
45°
4
56°
43°
5
59°
39°
6
63°
42°
7
66°
44°
8
57°
47°
9
62°
49°
10
65°
48°
11
65°
51°
12
68°
50°
13
63°
45°
14
60°
41°
15
64°
50°
16
68°
52°
17
72°
54°
18
73°
43°
19
61°
42°
20
61°
44°
21
62°
50°
22
68°
52°
23
70°
55°
24
75°
57°
25
75°
55°
26
73°
50°
27
65°
49°
28
66°
50°
29
67°
55°
30
68°
55°
31
67°
52°
1
68°
49°
2
70°
49°
3
72°
52°
4
71°
50°
5
72°
48°
6
70°
50°
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 55° to 75°, with overnight lows between 39° and 57°. The average high for May is 65° 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.
