S
M
T
W
T
F
S
30
80°
54°
1
58°
52°
2
61°
50°
3
78°
57°
4
85°
56°
5
63°
54°
6
71°
59°
7
86°
62°
8
68°
50°
9
77°
48°
10
84°
55°
11
83°
62°
12
85°
63°
13
87°
67°
14
79°
57°
15
65°
48°
16
79°
54°
17
76°
64°
18
86°
59°
19
79°
61°
20
86°
62°
21
87°
69°
22
87°
70°
23
85°
69°
24
85°
68°
25
87°
66°
26
87°
69°
27
86°
69°
28
86°
68°
29
76°
52°
30
62°
48°
31
72°
46°
1
80°
52°
2
87°
61°
3
92°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Brownsville
Brownsville's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Brownsville. See also: January | February | March.
