S
M
T
W
T
F
S
29
38°
21°
30
39°
28°
1
41°
23°
2
43°
21°
3
35°
27°
4
43°
30°
5
45°
30°
6
47°
28°
7
44°
26°
8
40°
24°
9
42°
21°
10
40°
24°
11
38°
26°
12
39°
23°
13
39°
15°
14
36°
19°
15
31°
22°
16
35°
22°
17
39°
25°
18
39°
25°
19
38°
26°
20
45°
22°
21
43°
22°
22
38°
21°
23
40°
21°
24
36°
17°
25
36°
15°
26
31°
6°
27
27°
5°
28
24°
13°
29
28°
1°
30
30°
3°
31
19°
4°
1
22°
16°
2
32°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Casey
Casey's December 2026 forecast shows daily high temperatures ranging from 19° to 47°, with overnight lows between 1° and 30°. The average high for December is 37° with an average low of 20°. 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 Casey. See also: January | February | March.
