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