S
M
T
W
T
F
S
29
43°
32°
30
42°
33°
1
43°
37°
2
47°
40°
3
48°
40°
4
47°
39°
5
47°
37°
6
46°
36°
7
47°
38°
8
48°
40°
9
48°
39°
10
47°
37°
11
47°
36°
12
48°
36°
13
47°
40°
14
44°
34°
15
46°
34°
16
45°
39°
17
46°
40°
18
47°
38°
19
51°
37°
20
47°
38°
21
46°
40°
22
47°
37°
23
48°
34°
24
45°
29°
25
44°
25°
26
44°
27°
27
37°
26°
28
36°
29°
29
39°
24°
30
39°
29°
31
40°
38°
1
46°
33°
2
46°
29°
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 36° to 51°, with overnight lows between 24° and 40°. The average high for December is 45° with an average low of 35°. 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.
