S
M
T
W
T
F
S
26
61°
42°
27
60°
48°
28
62°
46°
29
50°
34°
30
48°
32°
1
46°
30°
2
58°
32°
3
68°
48°
4
76°
44°
5
55°
35°
6
51°
36°
7
56°
38°
8
63°
46°
9
65°
40°
10
56°
39°
11
57°
41°
12
59°
49°
13
62°
47°
14
65°
49°
15
68°
48°
16
66°
47°
17
65°
49°
18
67°
48°
19
58°
55°
20
63°
43°
21
64°
44°
22
62°
44°
23
63°
46°
24
64°
47°
25
65°
50°
26
68°
48°
27
71°
50°
28
72°
51°
29
75°
55°
30
75°
57°
31
76°
57°
1
74°
54°
2
72°
58°
3
77°
58°
4
78°
59°
5
78°
56°
6
68°
57°
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 51° to 78°, with overnight lows between 36° and 59°. The average high for May is 66° with an average low of 49°. 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.
