Illinois December Temperature by Year

This page is a list of the average statewide temperature in the month of December in Illinois for each year from 1895–2023. It is a statewide average over the entire territory of the state, based on data from the NOAA.

State:

Month:

What Was the Hottest December in Illinois History?

2015 was the warmest December in Illinois history. Statewide, the average daily high temperature was 48.3 °F, and the average low was 33.9 °F.

What Was the Coldest December in Illinois History?

1983 was the coolest December in Illinois history. Statewide, the average daily high temperature was 24.3 °F, and the average low was 10.3 °F.

Click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	3	46.7	32.6
2022	67	38.1	22.5
2021	2	49.6	30.6
2020	37	41.8	24.3
2019	16	44.8	26.6
2018	23	42.3	26.6
2017	73	38.8	20.8
2016	78	36.1	21.8
2015	1	48.3	33.9
2014	28	39.8	27.9
2013	102	35.2	17.4
2012	9	44.6	29.0
2011	12	43.4	28.4
2010	114	31.1	16.8
2009	76	36.0	22.2
2008	95	36.6	17.0
2007	69	37.4	23.0
2006	20	43.6	27.0
2005	103	32.9	19.1
2004	59	39.6	22.5
2003	30	41.3	26.2
2002	45	40.8	23.5
2001	14	43.8	27.9
2000	128	25.9	9.3
1999	39	41.2	24.0
1998	21	44.1	26.1
1997	49	37.8	26.3
1996	65	38.1	22.9
1995	82	36.6	19.9
1994	12	43.4	28.3
1993	54	37.8	25.0
1992	63	38.1	23.2
1991	33	41.6	25.4
1990	66	39.4	21.4
1989	126	27.6	8.4
1988	59	40.9	21.0
1987	28	40.2	27.6
1986	50	38.3	25.2
1985	123	30.4	11.5
1984	14	44.9	26.7
1983	129	24.3	10.3
1982	6	45.2	30.7
1981	91	35.2	19.3
1980	63	38.7	22.8
1979	30	42.7	25.0
1978	76	37.1	21.2
1977	105	34.0	17.7
1976	117	34.1	12.8
1975	47	39.1	25.2
1974	54	37.7	25.1
1973	86	35.2	20.4
1972	98	33.8	19.7
1971	10	43.4	29.1
1970	39	41.0	24.2
1969	88	34.3	20.4
1968	79	36.4	21.0
1967	54	38.7	24.0
1966	69	37.7	22.8
1965	7	45.4	29.1
1964	83	35.8	20.3
1963	126	27.0	9.0
1962	101	35.8	16.7
1961	93	34.9	19.3
1960	105	34.5	17.3
1959	16	42.3	28.8
1958	113	33.1	15.1
1957	18	44.1	26.7
1956	27	41.4	26.7
1955	93	36.1	18.1
1954	53	38.3	24.8
1953	50	41.2	22.5
1952	39	39.2	25.9
1951	84	37.0	19.0
1950	122	30.4	12.7
1949	25	43.4	24.8
1948	42	41.0	24.0
1947	47	40.3	24.0
1946	22	44.2	25.3
1945	118	30.5	15.3
1944	115	31.2	16.0
1943	87	36.4	19.1
1942	109	33.2	17.8
1941	11	43.1	28.8
1940	24	41.6	26.9
1939	25	43.3	24.9
1938	69	38.5	22.0
1937	98	32.8	20.6
1936	35	42.1	24.7
1935	112	31.5	16.9
1934	95	33.7	19.9
1933	35	42.1	24.8
1932	80	37.2	19.5
1931	5	45.2	31.4
1930	73	36.8	22.8
1929	75	37.0	21.5
1928	43	40.6	24.1
1927	91	36.6	18.0
1926	88	34.9	19.8
1925	103	34.5	17.5
1924	115	32.5	14.7
1923	4	47.2	30.6
1922	67	39.8	20.8
1921	43	40.3	24.6
1920	54	39.1	23.7
1919	120	30.9	14.2
1918	8	45.0	29.1
1917	124	29.3	11.9
1916	100	36.3	16.6
1915	80	35.4	21.3
1914	120	30.0	15.2
1913	18	42.0	28.9
1912	38	42.3	23.3
1911	33	40.8	26.2
1910	108	34.2	17.1
1909	125	28.1	12.3
1908	52	41.0	22.3
1907	45	39.4	25.1
1906	54	38.8	23.9
1905	72	38.5	21.5
1904	85	37.1	18.6
1903	119	32.4	13.0
1902	95	34.0	19.6
1901	111	32.0	16.7
1900	62	39.0	22.6
1899	88	35.8	19.0
1898	109	34.1	16.9
1897	105	33.2	18.7
1896	32	41.7	25.7
1895	59	38.6	23.3