S
M
T
W
T
F
S
29
69°
51°
30
71°
62°
1
78°
61°
2
77°
54°
3
71°
53°
4
71°
60°
5
74°
57°
6
79°
60°
7
79°
55°
8
72°
52°
9
75°
59°
10
78°
60°
11
81°
49°
12
81°
48°
13
70°
55°
14
69°
50°
15
70°
48°
16
68°
56°
17
69°
58°
18
77°
59°
19
79°
58°
20
78°
58°
21
79°
60°
22
79°
60°
23
81°
49°
24
81°
46°
25
70°
46°
26
66°
51°
27
68°
58°
28
76°
59°
29
78°
60°
30
79°
60°
31
79°
59°
1
80°
57°
2
80°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mcallen-Pharr
Mcallen-Pharr's December 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 46° and 62°. The average high for December is 75° with an average low of 56°. 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 Mcallen-Pharr. See also: January | February | March.
