S
M
T
W
T
F
S
29
46°
35°
30
49°
35°
1
48°
34°
2
48°
34°
3
46°
33°
4
42°
32°
5
46°
33°
6
46°
32°
7
39°
28°
8
35°
27°
9
34°
26°
10
34°
26°
11
35°
31°
12
37°
30°
13
36°
30°
14
33°
21°
15
34°
22°
16
34°
25°
17
36°
28°
18
37°
27°
19
41°
22°
20
36°
19°
21
34°
19°
22
34°
21°
23
29°
23°
24
33°
22°
25
32°
22°
26
32°
14°
27
31°
12°
28
29°
8°
29
29°
10°
30
27°
21°
31
33°
21°
1
37°
15°
2
31°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Elgin
Elgin's December 2026 forecast shows daily high temperatures ranging from 27° to 49°, with overnight lows between 8° and 35°. The average high for December is 37° with an average low of 24°. 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 Elgin. See also: January | February | March.
