S
M
T
W
T
F
S
29
38°
16°
30
32°
12°
1
33°
18°
2
39°
24°
3
41°
23°
4
38°
22°
5
35°
22°
6
32°
13°
7
30°
12°
8
39°
21°
9
44°
21°
10
41°
20°
11
43°
20°
12
42°
20°
13
43°
21°
14
38°
20°
15
34°
19°
16
38°
9°
17
35°
13°
18
31°
7°
19
30°
17°
20
36°
17°
21
37°
10°
22
34°
16°
23
33°
13°
24
37°
15°
25
33°
20°
26
37°
9°
27
37°
0°
28
30°
7°
29
24°
4°
30
32°
2°
31
27°
17°
1
31°
22°
2
37°
15°
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 24° to 44°, with overnight lows between -0° and 24°. The average high for December is 35° with an average low of 15°. 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.
