S
M
T
W
T
F
S
29
71°
36°
30
75°
31°
1
62°
30°
2
55°
32°
3
57°
39°
4
60°
48°
5
70°
49°
6
72°
40°
7
73°
33°
8
69°
34°
9
58°
41°
10
61°
36°
11
58°
33°
12
58°
39°
13
57°
35°
14
67°
31°
15
57°
32°
16
56°
32°
17
56°
33°
18
53°
35°
19
56°
38°
20
56°
45°
21
69°
42°
22
71°
37°
23
63°
37°
24
58°
35°
25
59°
30°
26
55°
31°
27
55°
35°
28
56°
36°
29
59°
30°
30
56°
29°
31
53°
30°
1
54°
31°
2
56°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Hawthorn
Hawthorn's December 2026 forecast shows daily high temperatures ranging from 53° to 75°, with overnight lows between 29° and 49°. The average high for December is 61° with an average low of 35°. 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 Hawthorn. See also: January | February | March.