S
M
T
W
T
F
S
26
60°
46°
27
60°
48°
28
58°
45°
29
55°
37°
30
52°
40°
1
48°
38°
2
55°
38°
3
60°
43°
4
58°
44°
5
60°
44°
6
61°
46°
7
62°
45°
8
62°
45°
9
61°
40°
10
58°
44°
11
59°
46°
12
59°
44°
13
60°
40°
14
59°
41°
15
60°
46°
16
66°
48°
17
66°
52°
18
72°
53°
19
68°
49°
20
63°
46°
21
63°
44°
22
64°
44°
23
70°
54°
24
74°
55°
25
74°
54°
26
69°
50°
27
68°
54°
28
72°
56°
29
75°
57°
30
75°
57°
31
74°
58°
1
77°
59°
2
78°
60°
3
76°
59°
4
75°
53°
5
68°
52°
6
71°
59°
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 48° to 78°, with overnight lows between 37° and 60°. The average high for May is 65° 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.
