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 1956

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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 1956 1-Month	65.6°F (18.7°C)	66.2°F (19.0°C)	-0.6°F (-0.3°C)	48th Coolest	Coolest since: 1952	1918
	65.6°F (18.7°C)	66.2°F (19.0°C)	-0.6°F (-0.3°C)	81st Warmest	Warmest since: 1955	1925, 1933
	Ties: 1914, 1946, 1952, 2020
Aug–Sep 1956 2-Month	69.8°F (21.0°C)	69.8°F (21.0°C)	0.0°F (0.0°C)	64th Coolest	Coolest since: 1952	1967
	69.8°F (21.0°C)	69.8°F (21.0°C)	0.0°F (0.0°C)	65th Warmest	Warmest since: 1955	1936
	Ties: 1940
Jul–Sep 1956 3-Month	71.2°F (21.8°C)	71.7°F (22.1°C)	-0.5°F (-0.3°C)	46th Coolest	Coolest since: 1951	1967
	71.2°F (21.8°C)	71.7°F (22.1°C)	-0.5°F (-0.3°C)	83rd Warmest	Warmest since: 1955	1936
	Ties: 1910
Jun–Sep 1956 4-Month	71.7°F (22.1°C)	71.7°F (22.1°C)	0.0°F (0.0°C)	58th Coolest	Coolest since: 1951	1915, 1924
	71.7°F (22.1°C)	71.7°F (22.1°C)	0.0°F (0.0°C)	71st Warmest	Warmest since: 1955	1936
	Ties: 1970, 1984, 2006, 2008
May–Sep 1956 5-Month	70.2°F (21.2°C)	69.7°F (20.9°C)	0.5°F (0.3°C)	77th Coolest	Coolest since: 1951	1924
	70.2°F (21.2°C)	69.7°F (20.9°C)	0.5°F (0.3°C)	52nd Warmest	Warmest since: 1955	1936
	Ties: 1962, 1978, 1995
Apr–Sep 1956 6-Month	66.7°F (19.3°C)	66.7°F (19.3°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1951	1907
	66.7°F (19.3°C)	66.7°F (19.3°C)	0.0°F (0.0°C)	72nd Warmest	Warmest since: 1955	2010
	Ties: 1943, 2013
Mar–Sep 1956 7-Month	62.9°F (17.2°C)	62.9°F (17.2°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1951	1924
	62.9°F (17.2°C)	62.9°F (17.2°C)	0.0°F (0.0°C)	72nd Warmest	Warmest since: 1955	2012
	Ties: 1918, 1949, 1957, 1981
Feb–Sep 1956 8-Month	58.9°F (14.9°C)	58.7°F (14.8°C)	0.2°F (0.1°C)	71st Coolest	Coolest since: 1951	1904
	58.9°F (14.9°C)	58.7°F (14.8°C)	0.2°F (0.1°C)	58th Warmest	Warmest since: 1955	2012
	Ties: 1942, 1949
Jan–Sep 1956 9-Month	55.2°F (12.9°C)	54.9°F (12.7°C)	0.3°F (0.2°C)	68th Coolest	Coolest since: 1951	1904, 1912
	55.2°F (12.9°C)	54.9°F (12.7°C)	0.3°F (0.2°C)	61st Warmest	Warmest since: 1955	2012
	Ties: 1981
Dec 1955–Sep 1956 10-Month	52.4°F (11.3°C)	52.4°F (11.3°C)	0.0°F (0.0°C)	58th Coolest	Coolest since: 1951	1904
	52.4°F (11.3°C)	52.4°F (11.3°C)	0.0°F (0.0°C)	70th Warmest	Warmest since: 1955	2012
	Ties: 1901, 1906, 1935, 1959, 1964
Nov 1955–Sep 1956 11-Month	51.0°F (10.6°C)	51.4°F (10.8°C)	-0.4°F (-0.2°C)	45th Coolest	Coolest since: 1951	1904
	51.0°F (10.6°C)	51.4°F (10.8°C)	-0.4°F (-0.2°C)	83rd Warmest	Warmest since: 1955	2012
	Ties: 1910, 1936, 1965, 2008
Oct 1955–Sep 1956 12-Month	51.3°F (10.7°C)	51.6°F (10.9°C)	-0.3°F (-0.2°C)	44th Coolest	Coolest since: 1951	1904
	51.3°F (10.7°C)	51.6°F (10.9°C)	-0.3°F (-0.2°C)	84th Warmest	Warmest since: 1955	2012
	Ties: 1897, 1928, 1936, 1937, 2001
Apr 1955–Sep 1956 18-Month	57.2°F (14.0°C)	56.7°F (13.7°C)	0.5°F (0.3°C)	81st Coolest	Coolest since: 1952	1904, 1918
	57.2°F (14.0°C)	56.7°F (13.7°C)	0.5°F (0.3°C)	47th Warmest	Warmest since: 1955	2012
	Ties: 1976, 1986, 2004
Oct 1954–Sep 1956 24-Month	52.3°F (11.3°C)	51.6°F (10.9°C)	0.7°F (0.4°C)	89th Coolest	Coolest since: 1952	1979
Oct 1954–Sep 1956 24-Month	52.3°F (11.3°C)	51.6°F (10.9°C)	0.7°F (0.4°C)	38th Warmest	Warmest since: 1955	2017
Oct 1953–Sep 1956 36-Month	52.9°F (11.6°C)	51.6°F (10.9°C)	1.3°F (0.7°C)	107th Coolest	Coolest since: 1953	1979
	52.9°F (11.6°C)	51.6°F (10.9°C)	1.3°F (0.7°C)	19th Warmest	Warmest since: 1955	2018
	Ties: 1988
Oct 1952–Sep 1956 48-Month	52.9°F (11.6°C)	51.6°F (10.9°C)	1.3°F (0.7°C)	109th Coolest	Coolest since: 1954	1905
	52.9°F (11.6°C)	51.6°F (10.9°C)	1.3°F (0.7°C)	16th Warmest	Warmest since: 1955	2019
	Ties: 2006
Oct 1951–Sep 1956 60-Month	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	106th Coolest	Coolest since: 1955	1906
	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	18th Warmest	Warmest since: 1936	2020
	Ties: 1933, 1936, 2001, 2004, 2005, 2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published June 2023, retrieved on June 10, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings