S
M
T
W
T
F
S
29
42°
18°
30
41°
20°
1
43°
25°
2
47°
20°
3
40°
15°
4
40°
23°
5
43°
25°
6
40°
25°
7
38°
24°
8
38°
18°
9
37°
13°
10
35°
11°
11
36°
13°
12
37°
20°
13
40°
18°
14
43°
20°
15
47°
24°
16
46°
22°
17
37°
15°
18
36°
14°
19
36°
12°
20
37°
22°
21
37°
22°
22
36°
14°
23
35°
13°
24
38°
18°
25
39°
21°
26
41°
19°
27
39°
9°
28
38°
12°
29
39°
11°
30
38°
8°
31
36°
10°
1
37°
19°
2
39°
8°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Cortez
Cortez's December 2026 forecast shows daily high temperatures ranging from 35° to 47°, with overnight lows between 8° and 25°. The average high for December is 39° 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 Cortez. See also: January | February | March.
