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 2004

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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 2004 1-Month	67.7°F (19.8°C)	66.2°F (19.0°C)	1.5°F (0.8°C)	85th Coolest	Coolest since: 2003	1918
	67.7°F (19.8°C)	66.2°F (19.0°C)	1.5°F (0.8°C)	44th Warmest	Warmest since: 2002	1925, 1933
	Ties: 1947
Aug–Sep 2004 2-Month	68.2°F (20.1°C)	69.8°F (21.0°C)	-1.6°F (-0.9°C)	19th Coolest	Coolest since: 1994	1967
	68.2°F (20.1°C)	69.8°F (21.0°C)	-1.6°F (-0.9°C)	110th Warmest	Warmest since: 2003	1936
	Ties: 1929, 1975
Jul–Sep 2004 3-Month	69.7°F (20.9°C)	71.7°F (22.1°C)	-2.0°F (-1.2°C)	11th Coolest	Coolest since: 1992	1967
Jul–Sep 2004 3-Month	69.7°F (20.9°C)	71.7°F (22.1°C)	-2.0°F (-1.2°C)	118th Warmest	Warmest since: 2003	1936
Jun–Sep 2004 4-Month	69.8°F (21.0°C)	71.7°F (22.1°C)	-1.9°F (-1.1°C)	15th Coolest	Coolest since: 1992	1915, 1924
Jun–Sep 2004 4-Month	69.8°F (21.0°C)	71.7°F (22.1°C)	-1.9°F (-1.1°C)	114th Warmest	Warmest since: 2003	1936
May–Sep 2004 5-Month	69.0°F (20.6°C)	69.7°F (20.9°C)	-0.7°F (-0.3°C)	32nd Coolest	Coolest since: 2003	1924
	69.0°F (20.6°C)	69.7°F (20.9°C)	-0.7°F (-0.3°C)	97th Warmest	Warmest since: 2002	1936
	Ties: 1968, 1985
Apr–Sep 2004 6-Month	66.5°F (19.2°C)	66.7°F (19.3°C)	-0.2°F (-0.1°C)	46th Coolest	Coolest since: 2003	1907
	66.5°F (19.2°C)	66.7°F (19.3°C)	-0.2°F (-0.1°C)	83rd Warmest	Warmest since: 2002	2010
	Ties: 1897, 1912, 1947, 1969
Mar–Sep 2004 7-Month	63.5°F (17.5°C)	62.9°F (17.2°C)	0.6°F (0.3°C)	85th Coolest	Coolest since: 2003	1924
	63.5°F (17.5°C)	62.9°F (17.2°C)	0.6°F (0.3°C)	44th Warmest	Warmest since: 2002	2012
	Ties: 1895, 1896, 1908, 1913, 1963, 1995, 1999, 2001
Feb–Sep 2004 8-Month	59.3°F (15.2°C)	58.7°F (14.8°C)	0.6°F (0.4°C)	81st Coolest	Coolest since: 2003	1904
	59.3°F (15.2°C)	58.7°F (14.8°C)	0.6°F (0.4°C)	48th Warmest	Warmest since: 2002	2012
	Ties: 1896, 1995, 2019, 2021
Jan–Sep 2004 9-Month	55.4°F (13.0°C)	54.9°F (12.7°C)	0.5°F (0.3°C)	76th Coolest	Coolest since: 2003	1904, 1912
	55.4°F (13.0°C)	54.9°F (12.7°C)	0.5°F (0.3°C)	53rd Warmest	Warmest since: 2002	2012
	Ties: 1913, 1977
Dec 2003–Sep 2004 10-Month	53.3°F (11.8°C)	52.4°F (11.3°C)	0.9°F (0.5°C)	86th Coolest	Coolest since: 2003	1904
	53.3°F (11.8°C)	52.4°F (11.3°C)	0.9°F (0.5°C)	42nd Warmest	Warmest since: 2002	2012
	Ties: 1942, 1973
Nov 2003–Sep 2004 11-Month	52.5°F (11.4°C)	51.4°F (10.8°C)	1.1°F (0.6°C)	95th Coolest	Coolest since: 2003	1904
	52.5°F (11.4°C)	51.4°F (10.8°C)	1.1°F (0.6°C)	33rd Warmest	Warmest since: 2002	2012
	Ties: 1925, 1941, 1976, 2018
Oct 2003–Sep 2004 12-Month	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	93rd Coolest	Coolest since: 2003	1904
	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	35th Warmest	Warmest since: 2002	2012
	Ties: 1922, 1938
Apr 2003–Sep 2004 18-Month	57.2°F (14.0°C)	56.7°F (13.7°C)	0.5°F (0.3°C)	81st Coolest	Coolest since: 2003	1904, 1918
	57.2°F (14.0°C)	56.7°F (13.7°C)	0.5°F (0.3°C)	47th Warmest	Warmest since: 2002	2012
	Ties: 1956, 1976, 1986
Oct 2002–Sep 2004 24-Month	51.8°F (11.0°C)	51.6°F (10.9°C)	0.2°F (0.1°C)	73rd Coolest	Coolest since: 1997	1979
	51.8°F (11.0°C)	51.6°F (10.9°C)	0.2°F (0.1°C)	54th Warmest	Warmest since: 2003	2017
	Ties: 1898, 1941, 1948, 1950, 1965, 1972, 1989
Oct 2001–Sep 2004 36-Month	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	102nd Coolest	Coolest since: 2003	1979
	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	24th Warmest	Warmest since: 2002	2018
	Ties: 1935, 1987
Oct 2000–Sep 2004 48-Month	52.4°F (11.3°C)	51.6°F (10.9°C)	0.8°F (0.4°C)	97th Coolest	Coolest since: 1999	1905
	52.4°F (11.3°C)	51.6°F (10.9°C)	0.8°F (0.4°C)	28th Warmest	Warmest since: 2003	2019
	Ties: 1941, 1942, 1989, 1990, 2010, 2014
Oct 1999–Sep 2004 60-Month	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	106th Coolest	Coolest since: 2001	1906
	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	18th Warmest	Warmest since: 2003	2020
	Ties: 1933, 1936, 1956, 2001, 2005, 2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings