S
M
T
W
T
F
S
29
62°
44°
30
63°
45°
1
65°
42°
2
55°
34°
3
52°
31°
4
54°
34°
5
59°
42°
6
55°
35°
7
51°
35°
8
50°
29°
9
50°
31°
10
48°
28°
11
49°
29°
12
50°
32°
13
56°
30°
14
52°
30°
15
53°
38°
16
53°
36°
17
55°
34°
18
60°
31°
19
52°
25°
20
50°
25°
21
48°
26°
22
50°
29°
23
51°
30°
24
48°
26°
25
48°
25°
26
49°
26°
27
49°
25°
28
50°
26°
29
50°
31°
30
53°
28°
31
50°
26°
1
48°
22°
2
47°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in De Kalb
De Kalb's December 2026 forecast shows daily high temperatures ranging from 47° to 65°, with overnight lows between 22° and 45°. The average high for December is 52° with an average low of 31°. 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 De Kalb. See also: January | February | March.
