Chicago, IL: October

9 October 2026: October 2026 so far averaged 62.3°F in Chicago, IL, the warmest 1 to 9 October since 2025, tied 37th warmest of 155 (with 1947).

October 2026 so far, to 9 October 2026

Mean temperature: 62.3°F; Warmest since 2025; 37th warmest of 155
Precipitation: 1.41 in; Wettest since 2019; 27th wettest of 156

A normal 1 to 9 October in Chicago, IL (1991 to 2020): a mean temperature of 57°F, between 52.2°F and 66.6°F in eight years of ten and 0.93 in of precipitation, between 0.23 in and 1.90 in in eight years of ten.

The mean temperature of every 1 to 9 October in Chicago, IL since 1872: 62.3°F in 2026; the highest is 72.5°F, in 1879.

Normal range, 52.2 to 66.6°F

Every year, ranked, as a table

Every 1 to 9 October in Chicago, IL from 1871 to 2026, 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
2026	62.3	37	71.6	35	53	44	1.41	27	0
2025	68.2	4	77.7	6	58.7	10	1.35	31	0
2024	63.3	29	73.8	21	52.9	45	0.01	134	0
2023	64.4	20	72.9	26	55.9	22	0.32	98	0
2022	56.8	101	68.1	69	45.6	117	0.05	127	0
2021	69.7	2	75.4	13	64	2	0.84	64	0
2020	56.3	105	65.9	90	46.7	111	0.32	98	0
2019	59.9	64	68.7	61	51.1	65	2.60	10	0
2018	66.6	11	74.7	17	58.6	11	3.65	4	0
2017	66.9	8	77	9	56.8	18	0.77	68	0
2016	61.3	47	69.2	55	53.4	42	1.22	37	0
2015	57.5	91	63.7	108	51.3	63	0.06	125	0
2014	53.7	122	62.6	119	44.9	127	1.08	40	0
2013	64.2	23	73.9	20	54.6	31	1.03	47	0
2012	52.3	132	61.2	130	43.3	137	0.55	81	0
2011	61.3	47	74.9	15	47.7	106	trace	142	0
2010	57.9	84	70.3	46	45.6	117	0.42	90	0
2009	51.2	143	57.8	150	44.6	130	1.82	17	0
2008	54.8	116	63.2	111	46.4	113	1.06	42	0
2007	69.6	3	80.4	1	58.8	8	0.38	92	0
2006	59.2	71	70.2	48	48.1	100	1.41	27	0
2005	63.8	25	72.7	28	54.9	28	0.94	55	0
2004	55	114	67.9	72	42.1	141	0.92	62	0
2003	51.4	139	63.1	112	39.7	148	0.27	103	0
2002	59.5	68	67.3	77	51.7	62	1.00	48	0
2001	54.5	120	65.4	94	43.6	136	1.04	46	0
2000	52.2	133	61.8	124	42.6	139	0.98	53	0
1999	51.9	135	60.8	137	43	138	0.84	64	0
1998	56.3	105	63	114	49.7	76	1.49	23	0
1997	67.1	7	80.3	3	53.9	37	0.29	101	0
1996	53	127	63.7	108	42.3	140	0.18	115	0
1995	58.5	79	67	79	50	74	1.27	35	0
1994	56.6	102	64.6	102	48.6	92	0.82	66	0
1993	53.7	122	67.4	75	40	147	0.49	83	0
1992	57.3	93	69.7	50	44.9	127	0.24	106	0
1991	56.4	103	66.8	83	46	115	3.16	6	0
1990	58.6	78	69.1	57	48.1	100	2.79	8	0
1989	49.8	151	61	133	38.6	152	0.24	106	0
1988	50.8	144	61.4	127	40.1	145	0.81	67	0
1987	48.4	153	60.3	141	36.4	155	0.01	134	0
1986	57.1	97	64.9	98	49.2	80	2.81	7	0
1985	50.4	147	61.9	123	38.9	149	1.61	20	0
1984	58.4	81	69.2	55	47.7	106	0.29	101	0
1983	60.4	57	72	33	48.9	87	0.17	116	0
1982	62.9	31	76.8	10	49.1	83	1.00	48	0
1981	50.4	147	62.9	116	37.9	154	0.90	63	0
1980	52.5	131	64.8	100	40.2	143	0.03	130	0
1979	53	127	60.6	139	45.4	122	1.08	40	0
1978	54	121	62.9	116	45.1	125	0.38	92	0
1977	53.1	126	60.9	136	45.2	124	0.93	58	0
1976	58.5	79	68.9	58	48.1	100	1.40	29	0
1975	57.2	95	68.8	60	45.6	117	trace	142	0
1974	50.3	150	61.7	125	38.9	149	0.14	117	0
1973	63.7	26	72.3	29	55	27	0.48	84	0
1972	57.6	89	67.4	75	47.8	104	0.02	132	0
1971	62	39	71.3	38	52.7	51	0.43	88	0
1970	61.3	47	71.2	41	51.3	63	0.44	87	0
1969	66.5	13	78.2	5	54.8	30	0.27	103	0
1968	56.4	103	65.4	94	47.3	110	0.31	100	0
1967	62.9	31	72.1	32	53.7	41	0.08	123	0
1966	57.9	84	70.2	48	45.6	117	0.06	125	0
1965	53.2	125	61.3	128	45	126	0.19	112	0
1964	51.3	141	62.4	120	40.2	143	0.20	111	0
1963	66.6	11	80.4	1	52.8	49	trace	142	0
1962	62.8	33	68.1	69	57.6	14	0.57	79	0
1961	58.9	74	68.9	58	48.9	87	trace	142	0
1960	58.8	76	68.7	61	48.9	87	trace	142	0
1959	61.7	43	69.6	51	53.9	37	1.44	25	0
1958	59.8	66	71.1	44	48.6	92	1.06	42	0
1957	56.9	98	64.9	98	48.9	87	trace	142	0
1956	59.4	69	70.3	46	48.4	97	trace	142	0
1955	61.9	40	71.6	35	52.3	55	3.80	3	0
1954	63.4	28	70.4	45	56.4	19	7.11	1	0
1953	60.1	61	71.9	34	48.2	99	0.65	74	0
1952	48.9	152	59.1	145	38.8	151	0.03	130	0
1951	61.9	40	71.2	41	52.7	51	1.37	30	0
1950	57.7	88	66.2	87	49.2	80	1.19	38	0
1949	66.2	16	75.9	12	56.4	19	1.44	25	0
1948	54.9	115	62.1	121	47.8	104	0.46	85	0
1947	62.3	37	73.7	22	50.9	66	0.01	134	0
1946	62.8	33	77.1	8	48.6	92	0.00	151	0
1945	51.7	138	61.3	128	42.1	141	0.57	79	0
1944	59.9	64	67	79	52.9	45	0.59	77	0
1943	60.8	51	72.3	29	49.3	78	0.00	151	0
1942	62.6	35	74.3	18	50.9	66	0.43	88	0
1941	62.4	36	69.4	53	55.3	25	4.35	2	0
1940	61.8	42	71.3	38	52.2	57	0.93	58	0
1939	66.4	14	77.7	6	55.1	26	0.21	110	0
1938	60.2	59	67.6	74	52.9	45	0.05	127	0
1937	60.3	58	66.6	85	54	35	1.33	33	0
1936	59.1	72	65.4	94	52.8	49	1.86	15	0
1935	47.5	154	54.9	155	40.1	145	0.35	97	0
1934	60.7	52	68.6	66	52.9	45	0.00	151	0
1933	55.4	112	63.1	112	47.7	106	0.01	134	0
1932	57.4	92	66.4	86	48.4	97	1.06	42	0
1931	66.2	16	73	25	59.4	7	0.19	112	0
1930	60.1	61	66	89	54.1	34	1.54	21	0
1929	55.2	113	61.2	130	49.1	83	0.22	109	0
1928	63.6	27	71.6	35	55.6	24	0.73	70	0
1927	60.6	54	68.7	61	52.6	53	1.25	36	0
1926	61.4	45	68.7	61	54.2	33	0.94	55	0
1925	54.8	116	59.9	142	49.7	76	1.86	15	0
1924	60.2	59	68.2	68	52.2	57	0.73	70	0
1923	55.7	109	61	133	50.4	70	0.01	134	0
1922	66.9	8	73.1	24	60.7	5	1.35	31	0
1921	52.9	129	60.4	140	45.3	123	0.96	54	0
1920	60.7	52	69.6	51	51.8	60	0.01	134	0
1919	68.2	4	76.6	11	59.9	6	3.39	5	0
1918	59.1	72	65.9	90	52.2	57	0.12	119	0
1917	51.3	141	58	147	44.6	130	0.58	78	0
1916	64.3	22	74.9	15	53.8	40	0.38	92	0
1915	52.7	130	59.7	143	45.7	116	0.01	134	0
1914	67.5	6	72.8	27	62.2	3	0.42	90	0
1913	64.4	20	71.3	38	57.4	16	0.36	96	0
1912	60.6	54	68.7	61	52.4	54	0.99	52	0
1911	58.1	83	63.8	107	52.3	55	1.87	14	0
1910	63.3	29	69.4	53	57.2	17	1.49	23	0
1909	61.4	45	67.1	78	55.7	23	trace	142	0
1908	54.6	119	61.7	125	47.6	109	0.26	105	0
1907	60.5	56	67.9	72	53.1	43	0.76	69	0
1906	56.9	98	63	114	50.8	69	0.14	117	0
1905	66.9	8	75.3	14	58.6	11	0.02	132	0
1904	57.6	89	64.8	100	50.3	72	1.32	34	0
1903	60.1	61	66.2	87	54	35	0.93	58	0
1902	55.8	108	61.1	132	50.4	70	0.12	119	0
1901	56.3	105	64.6	102	48.1	100	0.53	82	0
1900	65.6	19	73.6	23	57.6	14	0.07	124	0
1899	56.9	98	63.4	110	50.3	72	0.01	134	0
1898	61.7	43	65.8	93	57.7	13	0.61	76	0
1897	64.2	23	72.2	31	56.2	21	trace	142	0
1896	51.4	139	56.2	153	46.6	112	0.00	151	0
1895	51.8	137	58.7	146	44.9	127	0.38	92	0
1894	50.6	146	57	151	44.2	133	0.11	121	0
1893	58.9	74	67	79	50.9	66	1.00	48	0
1892	55.6	111	62.7	118	48.6	92	0.04	129	0
1891	58.8	76	65.9	90	51.8	60	0.24	106	0
1890	59.4	69	64.4	105	54.4	32	0.94	55	0
1889	51.9	135	59.2	144	44.6	130	0.19	112	0
1888	50.8	144	57.9	149	43.8	135	1.06	42	0
1887	58.3	82	68	71	48.6	92	1.17	39	0
1886	57.2	95	65.2	97	49.2	80	0.00	151	0
1885	52.1	134	58	147	46.2	114	0.65	74	0
1884	66.4	14	74.1	19	58.8	8	1.67	19	0
1883	55.7	109	62.1	121	49.3	78	1.96	13	0
1882	66.2	16	71.2	41	61.1	4	1.51	22	0
1881	59.6	67	64.3	106	54.9	28	1.00	48	0
1880	57.9	84	66.8	83	49.1	83	2.66	9	0
1879	72.5	1	79.2	4	65.8	1	0.93	58	0
1878	61.2	50	68.4	67	53.9	37	0.73	70	0
1877	57.3	93	64.6	102	50	74	2.11	12	0
1876	46.8	155	55.4	154	38.1	153	0.09	122	0
1875	50.4	147	56.9	152	43.9	134	2.35	11	0
1874	54.8	116	60.7	138	49	86	0.70	73	0
1873	53.3	124	61	133	45.6	117	1.73	18	0
1872	57.8	87	66.9	82	48.8	91	0.45	86	0
1871							0.00	151	9

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1879	72.5
2021	69.7
2007	69.6
2025	68.2
1919	68.2
1914	67.5
1997	67.1
2017	66.9
1922	66.9
1905	66.9

Coldest
Year	Mean, °F
1876	46.8
1935	47.5
1987	48.4
1952	48.9
1989	49.8
1974	50.3
1985	50.4
1981	50.4
1875	50.4
1894	50.6

Wettest
Year	Precipitation, in
1954	7.11
1941	4.35
1955	3.80
2018	3.65
1919	3.39
1991	3.16
1986	2.81
1990	2.79
1880	2.66
2019	2.60

Driest
Year	Precipitation, in
1946	0.00
1943	0.00
1934	0.00
1896	0.00
1886	0.00
1871	0.00
2011	trace
1975	trace
1963	trace
1961	trace
More years share the last value

The hottest, coldest and wettest days

Hottest day: 79°F; 7 October 2026
Coldest night: 47°F; 5 October 2026
Wettest day: 1.41 in; 1 October 2026

Every month, season and year

Months

Seasons

Years

Chicago, IL the day's answers

All-time records

Every answer in words

October 2026 so far brought 1.41 in of precipitation in Chicago, IL, the wettest 1 to 9 October since 2019, tied 27th wettest of 156 (with 2006).
The hottest day of October 2026 so far in Chicago, IL: 79°F on Wednesday 7 October 2026.
The coldest night of October 2026 so far in Chicago, IL: a low of 47°F on Monday 5 October 2026.
The wettest day of October 2026 so far in Chicago, IL: 1.41 in on Thursday 1 October 2026.