S
M
T
W
T
F
S
29
34°
28°
30
48°
23°
1
39°
17°
2
40°
20°
3
39°
13°
4
38°
15°
5
31°
16°
6
32°
18°
7
33°
19°
8
33°
13°
9
32°
11°
10
29°
15°
11
33°
19°
12
35°
17°
13
38°
12°
14
32°
14°
15
30°
15°
16
30°
23°
17
38°
24°
18
43°
25°
19
45°
22°
20
45°
24°
21
42°
23°
22
45°
20°
23
43°
17°
24
36°
16°
25
34°
21°
26
36°
24°
27
40°
22°
28
40°
21°
29
39°
18°
30
35°
10°
31
34°
7°
1
27°
11°
2
29°
14°
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 48°, with overnight lows between 7° and 28°. The average high for December is 36° with an average low of 18°. 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.
