Chicago, IL: December

31 December 2025: December 2025 averaged 27°F in Chicago, IL, the coldest December since 2016, 56th coldest of 154.

December 2025

Mean temperature: 27°F; Coldest since 2016; 56th coldest of 154
Precipitation: 2.07 in; Wettest since 2023; 69th wettest of 155

A normal December in Chicago, IL (1991 to 2020): a mean temperature of 30°F, between 23.3°F and 34.8°F in eight years of ten and 1.88 in of precipitation, between 0.97 in and 3.34 in in eight years of ten.

The mean temperature of every December in Chicago, IL since 1872: 27°F in 2025; the lowest is 14.3°F, in 1983.

Normal range, 23.3 to 34.8°F

Every year, ranked, as a table

Every December in Chicago, IL from 1871 to 2025, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2025	27	99	34.4	90	19.5	107	2.07	69	0
2024	32	46	38.4	47	25.7	49	1.93	78	0
2023	39	4	44.2	6	33.8	4	2.97	30	0
2022	29.1	79	35.7	80	22.5	79	2.16	66	0
2021	38	7	45.8	3	30.2	11	2.30	62	0
2020	32.8	35	39.3	35	26.4	44	2.55	48	0
2019	34	26	41.3	23	26.6	39	1.55	104	0
2018	33.2	32	39.7	33	26.7	38	3.32	24	0
2017	27.2	98	34.2	94	20.1	103	0.59	143	0
2016	25	122	31.1	126	18.9	114	1.77	91	0
2015	39	4	44.5	5	33.5	6	4.87	6	0
2014	32	46	36.9	67	27.1	29	0.79	138	0
2013	23.3	133	31.1	126	15.6	138	1.94	75	0
2012	36.1	14	42.5	12	29.7	15	2.21	65	0
2011	35.2	19	41.8	17	28.6	21	2.65	41	0
2010	22.5	138	29	141	16	136	2.35	59	0
2009	26.5	105	32.3	116	20.6	99	2.73	35	0
2008	22.9	137	31.5	123	14.2	144	5.77	5	0
2007	27.8	91	34.1	96	21.6	90	3.49	19	0
2006	33.8	28	40.5	28	27.1	29	3.18	26	0
2005	23.3	133	29.4	135	17.3	131	1.36	109	0
2004	28.9	82	35.8	79	21.9	87	1.15	124	0
2003	31.6	55	38.6	43	24.6	58	1.82	87	0
2002	30.1	71	36.9	67	23.4	71	1.93	78	0
2001	33.4	30	40.2	30	26.5	43	0.99	132	0
2000	16	153	24.4	153	7.6	153	2.11	68	0
1999	29.8	75	37.7	57	22	86	2.68	39	0
1998	34.7	22	42.7	11	26.6	39	1.20	121	0
1997	31.5	57	36.1	77	26.8	35	1.50	105	0
1996	27.7	92	33.5	104	21.9	87	1.21	117	0
1995	26.3	109	33.6	103	19	112	0.59	143	0
1994	34.7	22	41.2	24	28.3	22	1.61	101	0
1993	29.8	75	36	78	23.6	67	1.00	131	0
1992	28.6	86	35.2	82	21.9	87	2.49	52	0
1991	30.2	69	38	51	22.5	79	1.71	93	0
1990	28.6	86	36.8	70	20.3	101	1.94	75	0
1989	17.4	151	25	152	9.8	150	0.46	149	0
1988	27.7	92	36.5	75	18.9	114	2.40	57	0
1987	32.1	44	38.6	43	25.7	49	3.77	16	0
1986	30.6	66	36.6	72	24.6	58	1.09	127	0
1985	17	152	26.2	150	7.8	152	1.49	106	0
1984	31	64	39.5	34	22.5	79	2.92	31	0
1983	14.3	154	21.1	154	7.5	154	2.99	29	0
1982	35.9	16	43.2	8	28.7	20	8.56	1	0
1981	24.9	125	32.5	113	17.3	131	1.05	130	0
1980	28	90	34.9	85	21.1	92	3.43	21	0
1979	34.1	25	41.4	21	26.8	35	2.51	51	0
1978	26.1	112	33.1	107	19.1	111	4.11	14	0
1977	24.7	126	31.9	119	17.5	127	2.37	58	0
1976	20	145	29.4	135	10.6	148	0.86	137	0
1975	31.5	57	37.5	62	25.5	51	2.53	50	0
1974	31.1	62	36.9	67	25.4	52	2.35	59	0
1973	27.5	95	33.8	98	21.1	92	4.32	11	0
1972	25.2	120	32.1	117	18.3	121	4.74	7	0
1971	36.6	11	43.9	7	29.4	17	5.93	4	0
1970	31.3	59	39.1	37	23.6	67	1.71	93	0
1969	28.7	83	34.4	90	23	77	1.78	90	0
1968	28.6	86	35.1	84	22.2	84	3.92	15	0
1967	31.6	55	38	51	25.3	53	3.65	18	0
1966	28.7	83	34.3	92	23	77	2.65	41	0
1965	36.3	12	42.4	14	30.2	11	4.42	10	0
1964	27.3	96	33.8	98	20.9	95	1.87	85	0
1963	17.9	150	25.8	151	9.9	149	0.76	139	0
1962	25	122	32.5	113	17.5	127	0.30	152	0
1961	26	113	33.3	105	18.7	117	1.89	84	0
1960	25.3	117	32.9	110	17.7	125	1.07	129	0
1959	35.8	17	41.5	20	30.2	11	2.00	70	0
1958	22.4	139	29.5	134	15.3	140	0.57	146	0
1957	34.4	24	41.8	17	27.1	29	1.95	74	0
1956	32.8	35	38.7	42	26.9	33	1.26	114	0
1955	25.8	115	33	108	18.6	119	0.52	147	0
1954	31.8	50	36.8	70	26.9	33	1.79	89	0
1953	31.7	53	39	38	24.5	61	3.10	27	0
1952	32.3	42	37.5	62	27.2	27	1.96	72	0
1951	26.2	110	34.7	88	17.7	125	2.76	32	0
1950	19.6	146	27.9	145	11.2	147	2.70	38	0
1949	31.7	53	39.2	36	24.3	65	6.67	3	0
1948	30.4	68	37.4	65	23.3	75	3.04	28	0
1947	30	72	36.6	72	23.4	71	1.63	98	0
1946	31.9	49	40.2	30	23.6	67	2.43	56	0
1945	22.2	141	28.9	142	15.4	139	1.65	96	0
1944	21.8	142	29.2	139	14.9	142	1.61	101	1
1943	27.6	94	35.4	81	19.8	105	0.34	151	0
1942	23	136	30.2	132	15.7	137	2.71	37	0
1941	36.3	12	41.4	21	31.3	10	0.97	133	0
1940	33.5	29	39	38	28	23	1.38	108	0
1939	35.1	20	40.7	26	29.4	17	0.90	134	0
1938	29.1	79	34.9	85	23.4	71	1.18	122	0
1937	26.7	101	31.7	120	21.6	90	1.27	113	0
1936	34	26	40.7	26	27.3	26	2.58	45	0
1935	25.2	120	30.7	129	19.7	106	1.24	116	0
1934	26.2	110	31.7	120	20.7	98	1.93	78	0
1933	31.3	59	37.6	60	25	54	1.39	107	0
1932	28.7	83	35.2	82	22.3	83	2.46	54	0
1931	38.4	6	43	9	33.8	4	2.28	63	0
1930	29.7	77	34.9	85	24.5	61	0.27	153	0
1929	28.6	86	33.7	101	23.5	70	1.84	86	0
1928	32.1	44	37.7	57	26.6	39	2.63	43	0
1927	26.9	100	34.3	92	19.5	107	2.74	34	0
1926	26.5	105	33	108	20.1	103	0.87	136	0
1925	25.3	117	31.4	124	19.3	109	1.21	117	0
1924	23.3	133	30.4	131	16.3	135	1.90	81	0
1923	39.7	3	45	4	34.4	2	1.96	72	0
1922	29.9	74	37.4	65	22.4	82	1.21	117	0
1921	32.5	39	38.6	43	26.4	44	4.63	8	0
1920	32.5	39	38.1	50	26.8	35	3.33	23	0
1919	21.4	144	27.9	145	14.9	142	0.70	140	0
1918	37.7	9	41.9	16	33.5	6	3.24	25	0
1917	22.4	139	28.5	143	16.4	134	0.88	135	0
1916	26	113	33.3	105	18.8	116	2.58	45	0
1915	29.1	79	33.8	98	24.4	64	1.31	112	0
1914	24.1	128	30.2	132	18	123	2.33	61	0
1913	37.4	10	42.4	14	32.5	8	0.45	150	0
1912	33.4	30	40.4	29	26.3	46	1.08	128	0
1911	35	21	40.1	32	29.8	14	2.54	49	0
1910	26.4	107	32.1	117	20.6	99	1.32	110	0
1909	21.6	143	28.1	144	15.2	141	4.18	13	0
1908	31.3	59	37.9	56	24.7	55	1.18	122	0
1907	32.8	35	38	51	27.6	24	2.73	35	0
1906	32.8	35	38.5	46	27	32	2.46	54	0
1905	31.8	50	37.5	62	26	48	0.68	141	0
1904	26.7	101	32.5	113	20.9	95	1.21	117	0
1903	19.6	146	27.1	148	12.1	145	2.28	63	0
1902	26.4	107	31.7	120	21.1	92	1.90	81	0
1901	24	129	29.3	137	18.7	117	1.70	95	0
1900	30.2	69	36.3	76	24	66	0.58	145	0
1899	27.3	96	33.7	101	20.9	95	1.81	88	0
1898	24.3	127	31.2	125	17.4	129	1.11	125	0
1897	25	122	31.1	126	19	112	1.62	100	0
1896	32.9	33	38.3	49	27.5	25	0.16	155	0
1895	29.6	78	34.6	89	24.6	58	6.70	2	0
1894	32.4	41	37.6	60	27.2	27	1.65	96	0
1893	25.4	116	32.6	112	18.2	122	2.14	67	0
1892	23.5	132	29.1	140	17.8	124	1.63	98	0
1891	35.4	18	41.6	19	29.1	19	1.32	110	0
1890	30.5	67	36.6	72	24.5	61	1.25	115	0
1889	40.7	2	47.2	2	34.1	3	1.90	81	0
1888	32.3	42	38	51	26.6	39	1.94	75	0
1887	26.7	101	34.2	94	19.2	110	3.67	17	0
1886	25.3	117	33.9	97	16.6	133	1.76	92	0
1885	31.8	50	38.9	41	24.7	55	3.35	22	0
1884	30	72	37.7	57	22.2	84	4.21	12	0
1883	30.9	65	38.4	47	23.4	71	1.59	103	0
1882	26.6	104	32.9	110	20.3	101	1.99	71	0
1881	37.8	8	43	9	32.5	8	2.67	40	0
1880	24	129	30.7	129	17.4	129	1.11	125	0
1879	31.1	62	39	38	23.2	76	2.47	53	0
1878	23.8	131	29.3	137	18.4	120	2.58	45	0
1877	43.4	1	49.1	1	37.6	1	2.75	33	0
1876	19.4	148	26.9	149	11.9	146	0.48	148	0
1875	36	15	42.5	12	29.5	16	2.62	44	0
1874	32.9	33	41	25	24.7	55	0.63	142	0
1873	32	46	38	51	26.1	47	4.44	9	0
1872	18.4	149	27.4	147	9.4	151	0.22	154	0
1871							3.44	20	31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1877	43.4
1889	40.7
1923	39.7
2023	39
2015	39
1931	38.4
2021	38
1881	37.8
1918	37.7
1913	37.4

Coldest
Year	Mean, °F
1983	14.3
2000	16
1985	17
1989	17.4
1963	17.9
1872	18.4
1876	19.4
1950	19.6
1903	19.6
1976	20

Wettest
Year	Precipitation, in
1982	8.56
1895	6.70
1949	6.67
1971	5.93
2008	5.77
2015	4.87
1972	4.74
1921	4.63
1873	4.44
1965	4.42

Driest
Year	Precipitation, in
1896	0.16
1872	0.22
1930	0.27
1962	0.30
1943	0.34
1913	0.45
1989	0.46
1876	0.48
1955	0.52
1958	0.57

The hottest, coldest and wettest days

Hottest day: 56°F; 28 December 2025
Coldest night: -2°F; 14 December 2025
Wettest day: 0.97 in; 28 December 2025

Every month, season and year

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Chicago, IL the day's answers

All-time records

Every answer in words

December 2025 brought 2.07 in of precipitation in Chicago, IL, the wettest December since 2023, 69th wettest of 155.
The hottest day of December 2025 in Chicago, IL: 56°F on Sunday 28 December 2025.
The coldest night of December 2025 in Chicago, IL: a low of -2°F on Sunday 14 December 2025.
The wettest day of December 2025 in Chicago, IL: 0.97 in on Sunday 28 December 2025.