Divisional 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, Climate Division 5. East

Average Temperature Rankings, May 2011

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 2011 1-Month	61.4°F (16.3°C)	61.0°F (16.1°C)	0.4°F (0.2°C)	68th Coolest	Coolest since: 2008	1907
	61.4°F (16.3°C)	61.0°F (16.1°C)	0.4°F (0.2°C)	61st Warmest	Warmest since: 2010	2018
	Ties: 1913, 1937, 1958
Apr–May 2011 2-Month	56.2°F (13.4°C)	55.4°F (13.0°C)	0.8°F (0.4°C)	77th Coolest	Coolest since: 2009	1907
	56.2°F (13.4°C)	55.4°F (13.0°C)	0.8°F (0.4°C)	52nd Warmest	Warmest since: 2010	1977
	Ties: 1933, 1958, 1963, 1981, 1982, 2016
Mar–May 2011 3-Month	50.9°F (10.5°C)	49.7°F (9.8°C)	1.2°F (0.7°C)	87th Coolest	Coolest since: 2008	1960
	50.9°F (10.5°C)	49.7°F (9.8°C)	1.2°F (0.7°C)	42nd Warmest	Warmest since: 2010	2012
	Ties: 1941
Feb–May 2011 4-Month	45.2°F (7.3°C)	44.1°F (6.7°C)	1.1°F (0.6°C)	88th Coolest	Coolest since: 2008	1978
	45.2°F (7.3°C)	44.1°F (6.7°C)	1.1°F (0.6°C)	41st Warmest	Warmest since: 2010	2012
	Ties: 1949, 1959, 1981
Jan–May 2011 5-Month	40.5°F (4.7°C)	40.1°F (4.5°C)	0.4°F (0.2°C)	68th Coolest	Coolest since: 2008	1978
	40.5°F (4.7°C)	40.1°F (4.5°C)	0.4°F (0.2°C)	61st Warmest	Warmest since: 2010	2012
	Ties: 1935
Dec 2010–May 2011 6-Month	37.2°F (2.9°C)	38.1°F (3.4°C)	-0.9°F (-0.5°C)	34th Coolest	Coolest since: 1996	1978
	37.2°F (2.9°C)	38.1°F (3.4°C)	-0.9°F (-0.5°C)	94th Warmest	Warmest since: 2010	2012
	Ties: 1994
Nov 2010–May 2011 7-Month	37.9°F (3.3°C)	38.3°F (3.5°C)	-0.4°F (-0.2°C)	45th Coolest	Coolest since: 2001	1904
	37.9°F (3.3°C)	38.3°F (3.5°C)	-0.4°F (-0.2°C)	83rd Warmest	Warmest since: 2010	2012
	Ties: 1906, 1937, 2001
Oct 2010–May 2011 8-Month	40.1°F (4.5°C)	40.2°F (4.6°C)	-0.1°F (-0.1°C)	52nd Coolest	Coolest since: 2003	1904
	40.1°F (4.5°C)	40.2°F (4.6°C)	-0.1°F (-0.1°C)	76th Warmest	Warmest since: 2010	2012
	Ties: 1967
Sep 2010–May 2011 9-Month	43.1°F (6.2°C)	43.0°F (6.1°C)	0.1°F (0.1°C)	68th Coolest	Coolest since: 2009	1904
	43.1°F (6.2°C)	43.0°F (6.1°C)	0.1°F (0.1°C)	60th Warmest	Warmest since: 2010	2012
	Ties: 1903, 1911, 1913, 1945, 1947, 2001, 2009
Aug 2010–May 2011 10-Month	46.4°F (8.0°C)	45.9°F (7.7°C)	0.5°F (0.3°C)	74th Coolest	Coolest since: 2009	1904
	46.4°F (8.0°C)	45.9°F (7.7°C)	0.5°F (0.3°C)	54th Warmest	Warmest since: 2010	2012
	Ties: 1896, 1937
Jul 2010–May 2011 11-Month	49.1°F (9.5°C)	48.5°F (9.2°C)	0.6°F (0.3°C)	79th Coolest	Coolest since: 2010	1904
	49.1°F (9.5°C)	48.5°F (9.2°C)	0.6°F (0.3°C)	49th Warmest	Warmest since: 2008	2012
	Ties: 1948, 1956, 1990
Jun 2010–May 2011 12-Month	51.2°F (10.7°C)	50.4°F (10.2°C)	0.8°F (0.5°C)	88th Coolest	Coolest since: 2010	1904
	51.2°F (10.7°C)	50.4°F (10.2°C)	0.8°F (0.5°C)	40th Warmest	Warmest since: 2008	2012
	Ties: 1957, 1988, 2008, 2018
Dec 2009–May 2011 18-Month	47.2°F (8.4°C)	46.2°F (7.9°C)	1.0°F (0.5°C)	91st Coolest	Coolest since: 2010	1905
	47.2°F (8.4°C)	46.2°F (7.9°C)	1.0°F (0.5°C)	36th Warmest	Warmest since: 2008	2017
	Ties: 1931, 1956, 1989, 2004
Jun 2009–May 2011 24-Month	50.9°F (10.5°C)	50.3°F (10.2°C)	0.6°F (0.3°C)	82nd Coolest	Coolest since: 2010	1905
	50.9°F (10.5°C)	50.3°F (10.2°C)	0.6°F (0.3°C)	45th Warmest	Warmest since: 2008	2017
	Ties: 1957, 1973
Jun 2008–May 2011 36-Month	50.7°F (10.4°C)	50.2°F (10.1°C)	0.5°F (0.3°C)	77th Coolest	Coolest since: 1998	1905, 1906
	50.7°F (10.4°C)	50.2°F (10.1°C)	0.5°F (0.3°C)	49th Warmest	Warmest since: 2010	2018
	Ties: 1924, 1940, 1944, 1986
Jun 2007–May 2011 48-Month	50.9°F (10.5°C)	50.3°F (10.2°C)	0.6°F (0.3°C)	82nd Coolest	Coolest since: 1998	1905
	50.9°F (10.5°C)	50.3°F (10.2°C)	0.6°F (0.3°C)	43rd Warmest	Warmest since: 2010	2019
	Ties: 1940, 1941, 1944, 1974, 1976
Jun 2006–May 2011 60-Month	51.0°F (10.6°C)	50.2°F (10.1°C)	0.8°F (0.5°C)	83rd Coolest	Coolest since: 1998	1905, 1906, 1908
	51.0°F (10.6°C)	50.2°F (10.1°C)	0.8°F (0.5°C)	41st Warmest	Warmest since: 2010	2020
	Ties: 1941, 1955, 1976

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 30, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings