S
M
T
W
T
F
S
29
38°
11°
30
30°
8°
1
31°
11°
2
37°
20°
3
40°
20°
4
36°
16°
5
31°
18°
6
30°
5°
7
28°
5°
8
37°
18°
9
42°
19°
10
41°
15°
11
42°
18°
12
41°
18°
13
41°
18°
14
37°
19°
15
34°
18°
16
38°
9°
17
35°
11°
18
30°
3°
19
28°
11°
20
32°
16°
21
35°
9°
22
35°
14°
23
33°
12°
24
36°
12°
25
33°
18°
26
35°
8°
27
37°
-1°
28
32°
4°
29
23°
6°
30
31°
0°
31
27°
14°
1
29°
18°
2
36°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Decker
Decker's December 2026 forecast shows daily high temperatures ranging from 23° to 42°, with overnight lows between -1° and 20°. The average high for December is 34° with an average low of 12°. 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 Decker. See also: January | February | March.
