S
M
T
W
T
F
S
29
45°
30°
30
42°
27°
1
36°
26°
2
30°
17°
3
33°
27°
4
37°
25°
5
34°
25°
6
31°
18°
7
28°
12°
8
26°
14°
9
30°
15°
10
33°
23°
11
35°
23°
12
39°
22°
13
35°
24°
14
30°
23°
15
36°
19°
16
35°
20°
17
33°
17°
18
31°
15°
19
32°
11°
20
26°
7°
21
23°
18°
22
31°
17°
23
34°
17°
24
31°
10°
25
30°
10°
26
27°
19°
27
30°
17°
28
33°
14°
29
28°
8°
30
27°
14°
31
26°
4°
1
29°
0°
2
21°
5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Colo
Colo's December 2026 forecast shows daily high temperatures ranging from 21° to 45°, with overnight lows between -0° and 30°. The average high for December is 32° with an average low of 17°. 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 Colo. See also: January | February | March.
