S
M
T
W
T
F
S
29
57°
47°
30
52°
41°
1
53°
45°
2
51°
46°
3
51°
43°
4
51°
44°
5
56°
44°
6
54°
41°
7
52°
42°
8
51°
41°
9
52°
45°
10
53°
48°
11
57°
46°
12
57°
42°
13
56°
39°
14
50°
38°
15
49°
39°
16
49°
38°
17
48°
39°
18
49°
41°
19
50°
42°
20
51°
43°
21
50°
46°
22
52°
44°
23
52°
45°
24
53°
46°
25
54°
44°
26
53°
40°
27
54°
44°
28
52°
47°
29
54°
46°
30
57°
42°
31
57°
41°
1
56°
45°
2
57°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Whitethorn
Whitethorn's December 2026 forecast shows daily high temperatures ranging from 48° to 57°, with overnight lows between 38° and 48°. The average high for December is 53° with an average low of 43°. 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 Whitethorn. See also: January | February | March.