S
M
T
W
T
F
S
29
50°
21°
30
45°
19°
1
45°
20°
2
50°
19°
3
49°
21°
4
48°
23°
5
55°
26°
6
55°
21°
7
50°
17°
8
49°
22°
9
48°
14°
10
43°
15°
11
44°
21°
12
52°
21°
13
54°
19°
14
44°
16°
15
40°
21°
16
40°
12°
17
41°
13°
18
44°
19°
19
45°
21°
20
49°
23°
21
47°
22°
22
46°
14°
23
42°
15°
24
40°
21°
25
47°
12°
26
46°
22°
27
47°
25°
28
Hist. Avg.
41°
20°
29
Hist. Avg.
41°
20°
30
Hist. Avg.
41°
20°
31
Hist. Avg.
41°
20°
1
Hist. Avg.
41°
20°
2
Hist. Avg.
41°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Pecos
Pecos's December 2026 forecast shows daily high temperatures ranging from 40° to 55°, with overnight lows between 12° and 26°. The average high for December is 47° with an average low of 19°. 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 Pecos. See also: January | February | March.