As of 18:17 CDT

Forest Park, IL weather in December

82°

Forest Park, Saturday, 8 August, 18:17

Clear. Feels like 85°. High 83°, low 69°.

Pressure30.00 inHg

Wind2 mph W

Humidity61%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

In December, Forest Park, IL averages a high of 35.6° and a low of 24.3°. About 2.8 inches of precipitation fall over the month (10 wet days). The record high is 67.1° (2012) and the record low -21.3° (1983). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	39°	28.8°	40%	63.3° (1970)	6.3° (2025)
2	40.1°	28.8°	32%	66.4° (1982)	9.5° (1976)
3	39.4°	28.9°	33%	67.1° (2012)	8.4° (2006)
4	38.7°	28.2°	28%	63.7° (1998)	0.1° (1991)
5	39°	27°	32%	65.8° (2001)	-0.2° (1991)
6	37°	25.9°	27%	60.8° (1998)	6.1° (1972)
7	35.4°	25.9°	27%	56.1° (1980)	2.5° (1972)
8	36.3°	26.6°	28%	61.5° (1991)	3.4° (2006)
9	36.9°	25.3°	40%	54.1° (2023)	-3.3° (1995)
10	36°	24.6°	28%	57.4° (2015)	-3.8° (1978)
11	35.1°	24.4°	35%	58.6° (2021)	-7.1° (1972)
12	36.9°	24.4°	33%	58.8° (2015)	-2.4° (2013)
13	36.7°	24.4°	25%	61.2° (2015)	-5.6° (2000)
14	36.7°	26.1°	32%	62.2° (1975)	-6.3° (1985)
15	37.8°	25.7°	32%	65.8° (2021)	-3.3° (2016)
16	35.8°	24.8°	37%	63.7° (2021)	-0.8° (1989)
17	33.1°	23°	22%	54.3° (2006)	-3.8° (1972)
18	33.1°	21.7°	20%	53.6° (2002)	-5.6° (1985)
19	34°	22.8°	22%	52° (2002)	-10.8° (2016)
20	34°	22.8°	33%	57.2° (1988)	-8° (1963)
21	34°	22.6°	33%	57.6° (1967)	-12.5° (1989)
22	34.3°	22.3°	32%	50° (2019)	-11.4° (1983)
23	34.9°	22.8°	37%	58.6° (2015)	-15.2° (1983)
24	32.9°	20.8°	35%	59.5° (2023)	-21.3° (1983)
25	31.6°	20.3°	27%	59.9° (1982)	-15.5° (1983)
26	32.9°	20.5°	33%	61.7° (2019)	-10.8° (1983)
27	34.5°	22.8°	30%	59.5° (2008)	-2.9° (2017)
28	35.6°	23.7°	37%	61.7° (1984)	-3.5° (1961)
29	34.5°	23.5°	35%	61.3° (1984)	-6.9° (1983)
30	33.8°	21.7°	33%	56.5° (2002)	-10.1° (1983)
31	33.1°	21.6°	37%	57.7° (1965)	-12.3° (1963)