S
M
T
W
T
F
S
29
40°
31°
30
39°
31°
1
38°
24°
2
39°
23°
3
36°
26°
4
34°
33°
5
39°
36°
6
44°
39°
7
48°
32°
8
49°
30°
9
43°
26°
10
35°
25°
11
36°
26°
12
35°
25°
13
35°
28°
14
33°
29°
15
35°
28°
16
37°
31°
17
36°
31°
18
38°
30°
19
38°
34°
20
46°
30°
21
48°
26°
22
39°
27°
23
37°
31°
24
41°
30°
25
41°
29°
26
38°
20°
27
35°
18°
28
33°
17°
29
27°
11°
30
30°
10°
31
28°
13°
1
23°
17°
2
28°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Alsip
Alsip's December 2026 forecast shows daily high temperatures ranging from 23° to 49°, with overnight lows between 10° and 39°. The average high for December is 37° with an average low of 26°. 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 Alsip. See also: January | February | March.
