S
M
T
W
T
F
S
29
27°
19°
30
31°
20°
1
32°
25°
2
32°
25°
3
33°
24°
4
35°
24°
5
34°
23°
6
36°
24°
7
34°
23°
8
32°
23°
9
34°
21°
10
31°
20°
11
35°
19°
12
31°
15°
13
27°
7°
14
28°
14°
15
27°
10°
16
29°
18°
17
31°
20°
18
33°
19°
19
33°
19°
20
32°
17°
21
33°
18°
22
32°
19°
23
33°
14°
24
32°
8°
25
30°
9°
26
21°
10°
27
23°
15°
28
26°
12°
29
33°
13°
30
32°
17°
31
32°
18°
1
33°
6°
2
34°
0°
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 21° to 36°, with overnight lows between 0° and 25°. The average high for December is 31° with an average low of 17°. 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.
