Illinois July Temperature by Year

This page is a list of the average statewide temperature in the month of July 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 July in Illinois History?

1936 was the warmest July in Illinois history. Statewide, the average daily high temperature was 97.3 °F, and the average low was 68.3 °F.

What Was the Coldest July in Illinois History?

2009 was the coolest July in Illinois history. Statewide, the average daily high temperature was 79.9 °F, and the average low was 60.8 °F.

Click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	62	86.1	64.7
2022	51	85.8	65.8
2021	83	83.9	65.3
2020	27	87.2	67.3
2019	26	87.5	67.2
2018	75	85.3	64.7
2017	45	86.8	65.4
2016	55	84.9	66.4
2015	92	83.6	64.8
2014	128	80.9	59.6
2013	113	83.0	63.2
2012	2	94.4	69.2
2011	6	90.2	69.7
2010	23	87.7	67.6
2009	128	79.9	60.8
2008	86	84.9	64.1
2007	105	84.4	62.1
2006	31	87.6	66.6
2005	40	87.6	65.1
2004	117	82.6	63.1
2003	80	85.4	64.1
2002	18	89.1	67.3
2001	48	86.6	65.3
2000	107	82.9	63.4
1999	11	89.2	68.0
1998	62	85.0	65.8
1997	72	86.2	64.0
1996	119	83.6	61.6
1995	39	87.1	65.7
1994	99	84.5	63.2
1993	35	85.5	67.6
1992	107	82.6	63.8
1991	40	87.6	64.9
1990	92	84.4	64.1
1989	58	85.8	65.2
1988	25	90.2	64.9
1987	27	88.0	66.7
1986	22	87.8	67.5
1985	90	85.5	63.1
1984	105	84.9	61.6
1983	9	90.9	67.3
1982	58	85.4	65.6
1981	80	84.3	65.3
1980	10	90.3	67.2
1979	102	84.2	63.1
1978	72	85.5	64.6
1977	23	88.9	66.3
1976	65	87.3	63.4
1975	96	85.2	62.7
1974	32	88.8	65.1
1973	55	86.0	65.2
1972	99	84.4	63.3
1971	125	82.7	61.1
1970	75	86.5	63.4
1969	45	85.9	66.2
1968	92	85.2	63.3
1967	126	83.0	60.5
1966	14	90.9	66.1
1965	104	84.8	62.4
1964	54	87.0	64.5
1963	89	85.8	63.1
1962	107	83.9	62.6
1961	90	85.1	63.4
1960	107	84.5	62.0
1959	86	86.3	62.6
1958	114	82.3	63.7
1957	35	87.3	65.8
1956	98	84.7	63.2
1955	7	90.8	68.8
1954	11	91.4	65.8
1953	35	88.6	64.6
1952	27	89.1	65.6
1951	96	84.6	63.4
1950	124	83.4	60.6
1949	20	88.0	67.8
1948	68	86.2	64.2
1947	122	84.0	60.6
1946	55	87.6	63.5
1945	114	85.0	60.9
1944	65	88.6	62.0
1943	33	88.7	64.8
1942	48	86.8	65.1
1941	44	88.3	64.0
1940	45	89.1	63.0
1939	51	87.3	64.4
1938	40	87.8	64.7
1937	75	87.0	63.0
1936	1	97.3	68.3
1935	16	89.4	67.2
1934	4	94.2	67.8
1933	30	89.6	64.8
1932	33	89.2	64.4
1931	11	91.2	65.9
1930	16	92.1	64.5
1929	62	86.5	64.2
1928	58	86.6	64.4
1927	102	85.7	61.8
1926	48	88.3	63.5
1925	72	86.9	63.2
1924	127	82.8	59.4
1923	40	88.7	63.9
1922	92	86.0	62.4
1921	8	92.5	66.8
1920	99	86.4	61.2
1919	19	91.1	64.8
1918	107	85.6	60.8
1917	83	86.5	62.7
1916	5	93.8	66.9
1915	123	82.3	62.0
1914	15	92.2	64.6
1913	21	90.4	65.1
1912	65	86.2	64.3
1911	51	88.7	62.8
1910	58	87.0	64.0
1909	117	83.6	61.9
1908	82	86.2	63.2
1907	68	86.0	64.4
1906	107	86.1	60.2
1905	120	83.1	61.9
1904	121	83.8	60.9
1903	68	87.0	63.3
1902	68	86.5	63.9
1901	3	95.7	67.3
1900	83	85.8	63.5
1899	86	86.4	62.7
1898	75	86.8	63.1
1897	35	87.6	65.6
1896	79	85.8	64.0
1895	116	84.6	61.3