Statewide Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Illinois

Average Temperature Rankings, September 1898

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Record Coolest
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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 1898 1-Month	68.9°F (20.5°C)	66.2°F (19.0°C)	2.7°F (1.5°C)	101st Coolest	Coolest since: 1896	1918
September 1898 1-Month	68.9°F (20.5°C)	66.2°F (19.0°C)	2.7°F (1.5°C)	28th Warmest	Warmest since: 1897	1925, 1933
Aug–Sep 1898 2-Month	71.0°F (21.7°C)	69.8°F (21.0°C)	1.2°F (0.7°C)	91st Coolest	Coolest since: 1896	1967
	71.0°F (21.7°C)	69.8°F (21.0°C)	1.2°F (0.7°C)	38th Warmest	Warmest since: 1897	1936
	Ties: 1953
Jul–Sep 1898 3-Month	72.3°F (22.4°C)	71.7°F (22.1°C)	0.6°F (0.3°C)	79th Coolest	Coolest since: 1896	1967
	72.3°F (22.4°C)	71.7°F (22.1°C)	0.6°F (0.3°C)	50th Warmest	Warmest since: 1897	1936
	Ties: 1948, 1977
Jun–Sep 1898 4-Month	72.5°F (22.5°C)	71.7°F (22.1°C)	0.8°F (0.4°C)	85th Coolest	Coolest since: 1896	1915, 1924
	72.5°F (22.5°C)	71.7°F (22.1°C)	0.8°F (0.4°C)	44th Warmest	Warmest since: 1897	1936
	Ties: 1973, 2022
May–Sep 1898 5-Month	70.3°F (21.3°C)	69.7°F (20.9°C)	0.6°F (0.4°C)	80th Coolest	Coolest since: 1897	1924
	70.3°F (21.3°C)	69.7°F (20.9°C)	0.6°F (0.4°C)	49th Warmest	Warmest since: 1896	1936
	Ties: 1896, 1906
Apr–Sep 1898 6-Month	66.8°F (19.3°C)	66.7°F (19.3°C)	0.1°F (0.0°C)	60th Coolest	Coolest since: 1897	1907
	66.8°F (19.3°C)	66.7°F (19.3°C)	0.1°F (0.0°C)	69th Warmest	Warmest since: 1896	2010
	Ties: 1937, 1949, 1957, 1963, 1995, 2000
Mar–Sep 1898 7-Month	63.3°F (17.4°C)	62.9°F (17.2°C)	0.4°F (0.2°C)	72nd Coolest	Coolest since: 1897	1924
	63.3°F (17.4°C)	62.9°F (17.2°C)	0.4°F (0.2°C)	57th Warmest	Warmest since: 1896	2012
	Ties: 1901, 1944, 1948, 1952, 1980
Feb–Sep 1898 8-Month	59.1°F (15.1°C)	58.7°F (14.8°C)	0.4°F (0.3°C)	75th Coolest	Coolest since: 1897	1904
Feb–Sep 1898 8-Month	59.1°F (15.1°C)	58.7°F (14.8°C)	0.4°F (0.3°C)	54th Warmest	Warmest since: 1896	2012
Jan–Sep 1898 9-Month	55.8°F (13.2°C)	54.9°F (12.7°C)	0.9°F (0.5°C)	86th Coolest	Coolest since: 1897	1904, 1912
Jan–Sep 1898 9-Month	55.8°F (13.2°C)	54.9°F (12.7°C)	0.9°F (0.5°C)	43rd Warmest	Warmest since: 1896	2012
Dec 1897–Sep 1898 10-Month	52.8°F (11.6°C)	52.4°F (11.3°C)	0.4°F (0.3°C)	73rd Coolest	Coolest since: 1897	1904
	52.8°F (11.6°C)	52.4°F (11.3°C)	0.4°F (0.3°C)	55th Warmest	Warmest since: 1896	2012
	Ties: 1981
Nov 1897–Sep 1898 11-Month	51.6°F (10.9°C)	51.4°F (10.8°C)	0.2°F (0.1°C)	70th Coolest	Coolest since: 1897	1904
	51.6°F (10.9°C)	51.4°F (10.8°C)	0.2°F (0.1°C)	58th Warmest	Warmest since: 1896	2012
	Ties: 1959, 1964
Oct 1897–Sep 1898 12-Month	52.3°F (11.3°C)	51.6°F (10.9°C)	0.7°F (0.4°C)	86th Coolest	Coolest since: 1897	1904
	52.3°F (11.3°C)	51.6°F (10.9°C)	0.7°F (0.4°C)	42nd Warmest	Warmest to Date	2012
	Ties: 1913, 1949, 1972, 1986, 1990
Apr 1897–Sep 1898 18-Month	57.0°F (13.9°C)	56.7°F (13.7°C)	0.3°F (0.2°C)	73rd Coolest	Coolest since: 1897	1904, 1918
	57.0°F (13.9°C)	56.7°F (13.7°C)	0.3°F (0.2°C)	55th Warmest	Warmest since: 1896	2012
	Ties: 1896, 1913, 1989
Oct 1896–Sep 1898 24-Month	51.8°F (11.0°C)	51.6°F (10.9°C)	0.2°F (0.1°C)	73rd Coolest	Coolest since: 1897	1979
	51.8°F (11.0°C)	51.6°F (10.9°C)	0.2°F (0.1°C)	54th Warmest	Warmest to Date	2017
	Ties: 1941, 1948, 1950, 1965, 1972, 1989, 2004
Oct 1895–Sep 1898 36-Month	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	67th Coolest	Coolest to Date	1979
	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	59th Warmest	Warmest to Date	2018
	Ties: 1911, 1946, 1966, 1975

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings