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, July 2009

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
July 2009 1-Month	70.3°F (21.3°C)	75.6°F (24.2°C)	-5.3°F (-2.9°C)	1st Coolest	Coolest since: 2009	2009, 2014
	70.3°F (21.3°C)	75.6°F (24.2°C)	-5.3°F (-2.9°C)	128th Warmest	Warmest since: 2008	1936
	Ties: 2014
Jun–Jul 2009 2-Month	71.5°F (21.9°C)	73.5°F (23.1°C)	-2.0°F (-1.2°C)	20th Coolest	Coolest since: 2004	1915
	71.5°F (21.9°C)	73.5°F (23.1°C)	-2.0°F (-1.2°C)	109th Warmest	Warmest since: 2008	1934
	Ties: 1906
May–Jul 2009 3-Month	68.6°F (20.3°C)	69.7°F (20.9°C)	-1.1°F (-0.6°C)	28th Coolest	Coolest since: 2003	1924
	68.6°F (20.3°C)	69.7°F (20.9°C)	-1.1°F (-0.6°C)	101st Warmest	Warmest since: 2008	1934
	Ties: 1968, 1981, 1996
Apr–Jul 2009 4-Month	64.3°F (17.9°C)	65.1°F (18.4°C)	-0.8°F (-0.5°C)	34th Coolest	Coolest since: 2003	1907
	64.3°F (17.9°C)	65.1°F (18.4°C)	-0.8°F (-0.5°C)	95th Warmest	Warmest since: 2008	1934
	Ties: 1915, 1972, 2003
Mar–Jul 2009 5-Month	60.2°F (15.7°C)	60.1°F (15.6°C)	0.1°F (0.1°C)	59th Coolest	Coolest since: 2008	1960
	60.2°F (15.7°C)	60.1°F (15.6°C)	0.1°F (0.1°C)	70th Warmest	Warmest since: 2007	2012
	Ties: 1898, 1902, 1903, 1913
Feb–Jul 2009 6-Month	55.6°F (13.1°C)	55.0°F (12.8°C)	0.6°F (0.3°C)	78th Coolest	Coolest since: 2008	1947
	55.6°F (13.1°C)	55.0°F (12.8°C)	0.6°F (0.3°C)	51st Warmest	Warmest since: 2007	2012
	Ties: 1985, 2007
Jan–Jul 2009 7-Month	50.6°F (10.3°C)	50.7°F (10.4°C)	-0.1°F (-0.1°C)	61st Coolest	Coolest since: 2008	1912
	50.6°F (10.3°C)	50.7°F (10.4°C)	-0.1°F (-0.1°C)	68th Warmest	Warmest since: 2007	2012
	Ties: 1910, 1989
Dec 2008–Jul 2009 8-Month	47.6°F (8.7°C)	48.1°F (8.9°C)	-0.5°F (-0.2°C)	45th Coolest	Coolest since: 2008	1904
	47.6°F (8.7°C)	48.1°F (8.9°C)	-0.5°F (-0.2°C)	83rd Warmest	Warmest since: 2007	2012
	Ties: 1923, 1943, 1980, 1994
Nov 2008–Jul 2009 9-Month	46.9°F (8.3°C)	47.3°F (8.5°C)	-0.4°F (-0.2°C)	48th Coolest	Coolest since: 2008	1904
	46.9°F (8.3°C)	47.3°F (8.5°C)	-0.4°F (-0.2°C)	80th Warmest	Warmest since: 2008	2012
	Ties: 1897, 1993, 2008
Oct 2008–Jul 2009 10-Month	47.6°F (8.7°C)	48.0°F (8.9°C)	-0.4°F (-0.2°C)	45th Coolest	Coolest since: 2003	1904
	47.6°F (8.7°C)	48.0°F (8.9°C)	-0.4°F (-0.2°C)	83rd Warmest	Warmest since: 2008	2012
	Ties: 1956, 1980, 1989, 1993, 2001
Sep 2008–Jul 2009 11-Month	49.4°F (9.7°C)	49.7°F (9.8°C)	-0.3°F (-0.1°C)	51st Coolest	Coolest since: 2003	1904
	49.4°F (9.7°C)	49.7°F (9.8°C)	-0.3°F (-0.1°C)	77th Warmest	Warmest since: 2008	2012
	Ties: 1903, 1937, 1950, 1989
Aug 2008–Jul 2009 12-Month	51.2°F (10.7°C)	51.6°F (10.9°C)	-0.4°F (-0.2°C)	41st Coolest	Coolest since: 1997	1904
	51.2°F (10.7°C)	51.6°F (10.9°C)	-0.4°F (-0.2°C)	87th Warmest	Warmest since: 2008	2012
	Ties: 1903, 1907, 1927, 1943, 1962, 1971, 1980
Feb 2008–Jul 2009 18-Month	52.1°F (11.2°C)	52.7°F (11.5°C)	-0.6°F (-0.3°C)	35th Coolest	Coolest since: 1997	1918
	52.1°F (11.2°C)	52.7°F (11.5°C)	-0.6°F (-0.3°C)	93rd Warmest	Warmest since: 2008	2012
	Ties: 1910, 1925, 1960, 1969
Aug 2007–Jul 2009 24-Month	51.9°F (11.1°C)	51.6°F (10.9°C)	0.3°F (0.2°C)	73rd Coolest	Coolest since: 1997	1905
	51.9°F (11.1°C)	51.6°F (10.9°C)	0.3°F (0.2°C)	54th Warmest	Warmest since: 2008	2017
	Ties: 1975, 1990, 2010
Aug 2006–Jul 2009 36-Month	52.2°F (11.2°C)	51.6°F (10.9°C)	0.6°F (0.3°C)	84th Coolest	Coolest since: 1998	1979
	52.2°F (11.2°C)	51.6°F (10.9°C)	0.6°F (0.3°C)	42nd Warmest	Warmest since: 2008	2018
	Ties: 1944, 1950, 1974, 1976
Aug 2005–Jul 2009 48-Month	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	105th Coolest	Coolest since: 2004	1905, 1980
	52.7°F (11.5°C)	51.6°F (10.9°C)	1.1°F (0.6°C)	20th Warmest	Warmest since: 2008	2019
	Ties: 1922, 2017
Aug 2004–Jul 2009 60-Month	52.8°F (11.6°C)	51.6°F (10.9°C)	1.2°F (0.7°C)	111th Coolest	Coolest since: 2005	1906
	52.8°F (11.6°C)	51.6°F (10.9°C)	1.2°F (0.7°C)	13th Warmest	Warmest since: 2008	2020
	Ties: 1957, 2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 5, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings