Halloween Climate Data for Chicago and Rockford

News Headlines

Updated October 31, 2026.

Chicago
Chicago Yearly
Rockford
Rockford Yearly
Links

Chicago

Official weather records for Chicago date back to 1871 for temperatures and precipitation, and to 1884 for snowfall. Observation location history for Chicago can be found here.

Halloween Climate Data for Chicago

Top 10 Warmest (Highs)			Top 10 Coldest (Highs)
1	1950	84	1	1873	31
2	1944	79	2	1917	32
3	1935	78	3	2019	33
	1933	78	4	1878	37
5	1974	77	5	2023	38
	1968	77	6	1930	39
7	1915	76		1906	39
	1888	76		1874	39
9	1900	75	9	2017	40
10	1909	74		1996	40
				1954	40

Top 10 Warmest (Lows)			Top 10 Coldest (Lows)
1	1974	65	1	1873	23
2	1900	61	2	1917	24
3	1933	59	3	2019	25
4	1950	58		1993	25
	1927	58	5	1996	26
6	1909	56		1988	26
7	1956	55		1923	26
	1876	55	8	1913	27
9	1998	54	9	1925	28
	1997	54		1890	28

Top 10 Wettest			Top 10 Snowiest
1	1994	2.26	1	2019	3.4
2	1941	1.27	2	2023	0.9
3	2013	1.04	3	2014	0.1
4	2015	0.77	4	1993	Trace
5	1912	0.75		1955	Trace
6	1973	0.65		1926	Trace
7	1935	0.62		1918	Trace
8	1987	0.59		1917	Trace
9	1960	0.55
10	1892	0.50

Percent of Years (Precip)			Percent of Years (Snow)
>0	50%		>0	6%
>=0.01	38%		>=0.1	2%
>=0.1	21%
>=0.5	7%
>=1	3%

Chicago Yearly

Year	High Temp	Min Temp	Precip	Snow
1872	48	39	0.00	M
1873	31	23	0.02	M
1874	39	30	0.00	M
1875	41	30	0.00	M
1876	73	55	0.16	M
1877	53	37	0.00	M
1878	37	28	0.12	M
1879	42	28	0.00	M
1880	52	34	0.00	M
1881	54	47	0.00	M
1882	67	52	0.38	M
1883	50	38	0.00	M
1884	55	40	T	M
1885	49	40	0.34	0.0
1886	68	45	0.00	0.0
1887	49	30	0.00	0.0
1888	76	52	0.00	0.0
1889	48	44	0.17	0.0
1890	41	28	0.00	0.0
1891	52	42	0.00	0.0
1892	49	42	0.50	0.0
1893	62	37	0.00	0.0
1894	46	36	T	0.0
1895	42	34	T	T
1896	49	37	0.01	0.0
1897	60	48	T	0.0
1898	45	34	T	0.0
1899	52	36	0.00	0.0
1900	75	61	0.00	0.0
1901	64	50	0.03	0.0
1902	67	49	0.00	0.0
1903	66	52	0.00	0.0
1904	62	39	0.00	0.0
1905	45	35	0.01	0.0
1906	39	33	0.00	0.0
1907	57	46	0.00	0.0
1908	43	34	0.00	0.0
1909	74	56	0.00	0.0
1910	60	43	0.00	0.0
1911	48	38	0.04	0.0
1912	46	41	0.75	0.0
1913	40	27	0.00	0.0
1914	72	48	0.00	0.0
1915	76	54	0.00	0.0
1916	58	46	T	0.0
1917	32	24	0.01	T
1918	46	37	0.03	T
1919	70	47	0.09	0.0
1920	60	47	T	0.0
1921	56	50	0.03	0.0
1922	59	52	0.00	0.0
1923	40	26	0.00	0.0
1924	70	51	0.10	0.0
1925	43	28	0.00	0.0
1926	48	32	T	T
1927	67	58	T	0.0
1928	51	34	0.00	0.0
1929	64	53	0.22	0.0
1930	39	30	0.00	0.0
1931	50	43	0.07	0.0
1932	44	39	0.11	0.0
1933	78	59	0.00	0.0
1934	46	38	T	0.0
1935	78	52	0.62	0.0
1936	55	42	0.19	0.0
1937	52	45	0.00	0.0
1938	64	42	0.00	0.0
1939	43	32	T	0.0
1940	64	48	T	0.0
1941	60	46	1.27	0.0
1942	53	38	0.00	0.0
1943	68	46	0.32	0.0
1944	79	50	0.00	0.0
1945	55	35	0.00	0.0
1946	54	47	0.00	0.0
1947	57	46	T	0.0
1948	61	46	T	0.0
1949	43	30	0.00	0.0
1950	84	58	0.00	0.0
1951	41	31	0.00	0.0
1952	69	50	0.00	0.0
1953	70	44	T	0.0
1954	40	31	0.00	0.0
1955	51	37	0.01	T
1956	68	55	0.01	0.0
1957	53	46	0.00	0.0
1958	68	39	0.00	0.0
1959	50	47	0.08	0.0
1960	62	41	0.55	0.0
1961	59	45	0.00	0.0
1962	47	36	0.00	0.0
1963	54	45	0.06	0.0
1964	69	36	0.00	0.0
1965	58	41	0.00	0.0
1966	60	43	0.00	0.0
1967	53	49	0.10	0.0
1968	77	44	0.00	0.0
1969	51	46	0.31	0.0
1970	51	37	0.19	0.0
1971	56	37	0.00	0.0
1972	45	44	0.02	0.0
1973	49	41	0.65	0.0
1974	77	65	T	0.0
1975	60	41	0.00	0.0
1976	49	32	0.01	0.0
1977	64	50	0.25	0.0
1978	55	39	0.00	0.0
1979	73	53	0.29	0.0
1980	61	37	0.00	0.0
1981	72	54	0.00	0.0
1982	64	51	0.18	0.0
1983	53	39	T	0.0
1984	61	34	0.47	0.0
1985	55	45	0.08	0.0
1986	65	44	0.00	0.0
1987	58	46	0.59	0.0
1988	53	26	T	0.0
1989	55	35	0.01	0.0
1990	73	42	0.00	0.0
1991	54	41	0.02	0.0
1992	50	36	0.06	0.0
1993	44	25	T	T
1994	54	37	2.26	0.0
1995	50	40	0.20	0.0
1996	40	26	0.00	0.0
1997	65	54	0.00	0.0
1998	59	54	0.00	0.0
1999	69	46	0.01	0.0
2000	70	47	0.00	0.0
2001	68	50	0.00	0.0
2002	49	31	0.00	0.0
2003	67	49	0.01	0.0
2004	56	45	0.00	0.0
2005	57	50	0.09	0.0
2006	62	35	0.00	0.0
2007	62	41	0.00	0.0
2008	70	48	0.00	0.0
2009	46	35	T	0.0
2010	52	36	0.00	0.0
2011	53	36	0.00	0.0
2012	50	34	0.00	0.0
2013	64	46	1.04	0.0
2014	47	33	0.03	0.1
2015	52	45	0.77	0.0
2016	61	38	0.00	0.0
2017	40	34	0.00	0.0
2018	61	47	0.17	0.0
2019	33	25	0.31	3.4
2020	59	30	0.00	0.0
2021	53	39	0.00	0.0
2022	57	50	0.02	0.0
2023	38	30	0.03	0.9
2024	71	43	0.03	0.0
2025	53	40	0.14	0.0

Rockford

Official weather records for Rockford date back to 1905 for temperatures, precipitation, and snowfall. Observation location history for Rockford can be found here.

Halloween Climate Data for Rockford

Top 10 Warmest (Highs)			Top 10 Coldest (Highs)
1	1950	84	1	1917	32
2	1933	82	2	2019	33
3	1935	80	3	1996	36
4	1944	77	4	2023	38
5	1974	75		1951	38
	1968	75		1906	38
	1915	75	7	2017	40
	1914	75	8	2002	41
9	2000	73	9	1995	42
	1990	73		1954	42

Top 10 Warmest (Lows)			Top 10 Coldest (Lows)
1	1974	62	1	1925	14
2	1950	54	2	1917	18
	1948	54	3	2019	20
	1929	54	4	1923	21
5	1935	53		1913	21
6	1997	52	6	1930	22
	1982	52	7	2023	24
	1921	52		1993	24
9	1981	51	9	1996	25
10	1998	50		1988	25
				1976	25

Top 10 Wettest			Top 10 Snowiest
1	1919	2.51	1	2019	3.1
2	1960	1.37	2	2014	0.1
3	1985	1.17	3	2023	T
4	1936	0.8		2017	T
5	2013	0.79		1935	T
6	1984	0.78		1926	T
7	1935	0.70		1918	T
8	1994	0.60		1917	T
9	2015	0.55
10	1969	0.47

Percent of Years (Precip)			Percent of Years (Snow)
>0	47%		>0	7%
>=0.01	32%		>=0.1	2%
>=0.1	23%
>=0.5	8%
>=1	3%

Rockford Yearly

Year	High Temp	Min Temp	Precip	Snow
1905	44	30	0.00	0.0
1906	38	27	0.00	0.0
1907	48	43	0.02	0.0
1908	44	25	0.00	0.0
1909	71	49	0.00	0.0
1910	60	31	0.00	0.0
1911	42	38	0.14	0.0
1912	44	35	0.14	0.0
1913	43	21	0.00	0.0
1914	75	41	0.00	0.0
1915	75	39	0.00	0.0
1916	58	42	0.00	0.0
1917	32	18	0.03	T
1918	44	31	T	T
1919	M	M	2.51	0.0
1920	56	46	0.05	0.0
1921	61	52	0.10	0.0
1922	66	46	0.00	0.0
1923	44	21	0.00	0.0
1924	71	46	0.20	0.0
1925	43	14	0.00	0.0
1926	49	25	T	T
1927	70	50	0.00	0.0
1928	45	29	0.00	0.0
1929	63	54	0.46	0.0
1930	43	22	0.00	0.0
1931	51	41	0.07	0.0
1932	44	37	T	0.0
1933	82	48	0.03	0.0
1934	53	34	0.00	0.0
1935	80	53	0.70	T
1936	51	40	0.80	0.0
1937	59	33	0.00	0.0
1938	67	36	0.00	0.0
1939	45	32	0.00	0.0
1940	67	37	0.00	0.0
1941	49	42	0.25	0.0
1942	55	35	0.00	0.0
1943	65	42	0.15	0.0
1944	77	49	0.00	0.0
1945	65	29	0.00	0.0
1946	55	38	0.00	0.0
1947	57	46	0.00	0.0
1948	68	54	0.00	0.0
1949	44	25	0.00	0.0
1950	84	54	0.00	0.0
1951	38	29	0.00	0.0
1952	71	40	0.00	0.0
1953	64	42	T	0.0
1954	42	27	0.00	0.0
1955	51	36	T	0.0
1956	70	49	0.00	0.0
1957	57	31	0.00	0.0
1958	66	31	0.00	0.0
1959	50	44	0.07	0.0
1960	59	41	1.37	0.0
1961	57	41	0.00	0.0
1962	46	32	0.00	0.0
1963	51	46	0.15	0.0
1964	67	35	0.00	0.0
1965	59	39	0.00	0.0
1966	58	40	0.00	0.0
1967	47	44	0.08	0.0
1968	75	42	0.00	0.0
1969	50	44	0.47	0.0
1970	46	34	T	0.0
1971	52	34	0.00	0.0
1972	47	43	0.17	0.0
1973	48	42	0.38	0.0
1974	75	62	0.18	0.0
1975	62	39	T	0.0
1976	49	25	0.00	0.0
1977	61	50	0.25	0.0
1978	61	34	0.00	0.0
1979	70	48	0.28	0.0
1980	62	29	0.00	0.0
1981	66	51	T	0.0
1982	68	52	0.02	0.0
1983	56	39	T	0.0
1984	62	33	0.78	0.0
1985	53	40	1.17	0.0
1986	66	41	0.00	0.0
1987	58	41	0.07	0.0
1988	54	25	T	0.0
1989	47	32	T	0.0
1990	73	42	0.00	0.0
1991	53	36	0.26	0.0
1992	50	30	0.18	0.0
1993	43	24	0.00	0.0
1994	46	40	0.60	0.0
1995	42	34	0.27	0.0
1996	36	25	0.00	0.0
1997	67	52	0.00	0.0
1998	56	50	0.00	0.0
1999	68	40	0.00	0.0
2000	73	49	0.00	0.0
2001	65	44	0.00	0.0
2002	41	26	0.00	0.0
2003	65	46	T	0.0
2004	53	44	0.00	0.0
2005	56	43	T	0.0
2006	51	30	0.00	0.0
2007	63	40	0.00	0.0
2008	72	42	0.00	0.0
2009	46	30	T	0.0
2010	53	34	0.00	0.0
2011	51	28	0.00	0.0
2012	51	29	0.00	0.0
2013	63	44	0.79	0.0
2014	47	33	T	0.1
2015	52	45	0.55	0.0
2016	61	38	T	0.0
2017	40	32	T	T
2018	59	45	0.00	0.0
2019	33	20	0.16	3.1
2020	61	29	0.00	0.0
2021	54	37	0.00	0.0
2022	68	41	0.00	0.0
2023	38	24	T	T
2024	68	42	0.02	0.0
2025	52	36	0.01	0.0

Links

LOT RSS Feed