S
M
T
W
T
F
S
29
48°
24°
30
45°
24°
1
38°
23°
2
43°
23°
3
37°
24°
4
39°
23°
5
49°
24°
6
50°
23°
7
46°
22°
8
47°
21°
9
39°
22°
10
40°
21°
11
36°
6°
12
33°
6°
13
33°
11°
14
39°
14°
15
43°
17°
16
44°
18°
17
47°
15°
18
42°
17°
19
46°
18°
20
46°
14°
21
45°
19°
22
48°
10°
23
42°
5°
24
35°
4°
25
30°
13°
26
41°
17°
27
41°
19°
28
40°
19°
29
45°
18°
30
43°
18°
31
41°
10°
1
38°
2°
2
35°
0°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Oshkosh
Oshkosh's December 2026 forecast shows daily high temperatures ranging from 30° to 50°, with overnight lows between 0° and 24°. The average high for December is 42° with an average low of 16°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Oshkosh. See also: January | February | March.
