S
M
T
W
T
F
S
29
40°
27°
30
43°
26°
1
41°
27°
2
41°
29°
3
42°
18°
4
40°
17°
5
33°
28°
6
37°
28°
7
38°
29°
8
42°
30°
9
35°
19°
10
32°
16°
11
Hist. Avg.
35°
23°
12
Hist. Avg.
34°
23°
13
Hist. Avg.
34°
23°
14
Hist. Avg.
34°
22°
15
Hist. Avg.
33°
22°
16
Hist. Avg.
33°
22°
17
Hist. Avg.
33°
22°
18
Hist. Avg.
33°
22°
19
Hist. Avg.
32°
21°
20
Hist. Avg.
32°
21°
21
Hist. Avg.
32°
21°
22
Hist. Avg.
32°
21°
23
Hist. Avg.
32°
20°
24
Hist. Avg.
31°
20°
25
Hist. Avg.
31°
20°
26
Hist. Avg.
31°
20°
27
Hist. Avg.
31°
20°
28
Hist. Avg.
31°
20°
29
Hist. Avg.
30°
19°
30
Hist. Avg.
30°
19°
31
Hist. Avg.
30°
19°
1
Hist. Avg.
30°
19°
2
Hist. Avg.
30°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Custer
Custer's December 2026 forecast shows daily high temperatures ranging from 32° to 43°, with overnight lows between 16° and 30°. The average high for December is 39° with an average low of 25°. 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.
