S
M
T
W
T
F
S
30
66°
46°
1
64°
54°
2
63°
45°
3
66°
46°
4
63°
52°
5
66°
43°
6
66°
45°
7
72°
45°
8
73°
52°
9
73°
57°
10
75°
61°
11
79°
52°
12
79°
61°
13
75°
52°
14
73°
55°
15
75°
61°
16
75°
57°
17
72°
48°
18
75°
48°
19
70°
48°
20
72°
52°
21
75°
50°
22
73°
50°
23
63°
50°
24
72°
57°
25
72°
57°
26
66°
54°
27
64°
54°
28
63°
50°
29
64°
50°
30
66°
54°
31
61°
48°
1
54°
48°
2
64°
52°
3
61°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Barnwell
Barnwell'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 Barnwell. See also: January | February | March.