S
M
T
W
T
F
S
26
52°
33°
27
50°
34°
28
56°
42°
29
54°
41°
30
57°
39°
1
61°
44°
2
63°
47°
3
56°
48°
4
64°
48°
5
67°
47°
6
62°
46°
7
66°
46°
8
68°
49°
9
69°
50°
10
69°
49°
11
68°
51°
12
69°
50°
13
65°
45°
14
60°
46°
15
63°
48°
16
64°
46°
17
66°
43°
18
70°
48°
19
72°
49°
20
70°
47°
21
66°
44°
22
64°
43°
23
64°
44°
24
66°
43°
25
66°
44°
26
67°
48°
27
70°
49°
28
75°
54°
29
76°
57°
30
76°
58°
31
74°
55°
1
72°
50°
2
68°
51°
3
70°
56°
4
77°
58°
5
78°
61°
6
78°
58°
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 50° to 78°, with overnight lows between 33° and 61°. The average high for May is 66° with an average low of 48°. 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.
