S
M
T
W
T
F
S
29
51°
36°
30
55°
36°
1
52°
35°
2
50°
29°
3
42°
27°
4
47°
28°
5
53°
35°
6
48°
32°
7
41°
23°
8
40°
20°
9
39°
21°
10
39°
26°
11
41°
31°
12
42°
26°
13
44°
24°
14
40°
21°
15
39°
26°
16
40°
29°
17
42°
28°
18
45°
26°
19
44°
21°
20
40°
20°
21
37°
20°
22
38°
22°
23
41°
25°
24
40°
24°
25
38°
19°
26
38°
17°
27
37°
19°
28
35°
19°
29
36°
18°
30
37°
21°
31
39°
18°
1
38°
16°
2
36°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Custer
Custer's December 2026 forecast shows daily high temperatures ranging from 35° to 55°, with overnight lows between 13° and 36°. The average high for December is 42° with an average low of 24°. 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 Custer. See also: January | February | March.
