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 8. Southwest

Average Temperature Rankings, April 2011

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 2011 1-Month	59.1°F (15.1°C)	55.3°F (12.9°C)	3.8°F (2.2°C)	114th Coolest	Coolest since: 2009	1907
	59.1°F (15.1°C)	55.3°F (12.9°C)	3.8°F (2.2°C)	15th Warmest	Warmest since: 2010	1896
	Ties: 1941, 1985, 1986
Mar–Apr 2011 2-Month	52.7°F (11.5°C)	50.0°F (10.0°C)	2.7°F (1.5°C)	103rd Coolest	Coolest since: 2009	1926, 1960
Mar–Apr 2011 2-Month	52.7°F (11.5°C)	50.0°F (10.0°C)	2.7°F (1.5°C)	26th Warmest	Warmest since: 2010	2012
Feb–Apr 2011 3-Month	47.3°F (8.5°C)	44.9°F (7.2°C)	2.4°F (1.3°C)	102nd Coolest	Coolest since: 2010	1899
	47.3°F (8.5°C)	44.9°F (7.2°C)	2.4°F (1.3°C)	27th Warmest	Warmest since: 2009	2012
	Ties: 1955, 2004
Jan–Apr 2011 4-Month	42.6°F (5.9°C)	41.5°F (5.3°C)	1.1°F (0.6°C)	84th Coolest	Coolest since: 2010	1978
	42.6°F (5.9°C)	41.5°F (5.3°C)	1.1°F (0.6°C)	45th Warmest	Warmest since: 2009	2012
	Ties: 1931, 1995, 2009
Dec 2010–Apr 2011 5-Month	39.9°F (4.4°C)	40.1°F (4.5°C)	-0.2°F (-0.1°C)	52nd Coolest	Coolest since: 2003	1978
	39.9°F (4.4°C)	40.1°F (4.5°C)	-0.2°F (-0.1°C)	76th Warmest	Warmest since: 2010	2012
	Ties: 1903, 1924, 1988
Nov 2010–Apr 2011 6-Month	41.1°F (5.1°C)	40.8°F (4.9°C)	0.3°F (0.2°C)	64th Coolest	Coolest since: 2008	1912
	41.1°F (5.1°C)	40.8°F (4.9°C)	0.3°F (0.2°C)	64th Warmest	Warmest since: 2010	2012
	Ties: 1933, 1941
Oct 2010–Apr 2011 7-Month	43.7°F (6.5°C)	43.3°F (6.3°C)	0.4°F (0.2°C)	76th Coolest	Coolest since: 2010	1899, 1978
	43.7°F (6.5°C)	43.3°F (6.3°C)	0.4°F (0.2°C)	52nd Warmest	Warmest since: 2008	2012
	Ties: 1945, 1966, 2013
Sep 2010–Apr 2011 8-Month	46.9°F (8.3°C)	46.4°F (8.0°C)	0.5°F (0.3°C)	74th Coolest	Coolest since: 2010	1918
	46.9°F (8.3°C)	46.4°F (8.0°C)	0.5°F (0.3°C)	54th Warmest	Warmest since: 2008	2017
	Ties: 1916, 1945, 1948, 1950
Aug 2010–Apr 2011 9-Month	50.6°F (10.3°C)	49.8°F (9.9°C)	0.8°F (0.4°C)	87th Coolest	Coolest since: 2010	1918
	50.6°F (10.3°C)	49.8°F (9.9°C)	0.8°F (0.4°C)	41st Warmest	Warmest since: 2008	2017
	Ties: 1901
Jul 2010–Apr 2011 10-Month	53.5°F (11.9°C)	52.6°F (11.4°C)	0.9°F (0.5°C)	92nd Coolest	Coolest since: 2010	1918
	53.5°F (11.9°C)	52.6°F (11.4°C)	0.9°F (0.5°C)	36th Warmest	Warmest since: 2008	2012
	Ties: 1934, 1995
Jun 2010–Apr 2011 11-Month	55.8°F (13.2°C)	54.5°F (12.5°C)	1.3°F (0.7°C)	103rd Coolest	Coolest since: 2010	1918
	55.8°F (13.2°C)	54.5°F (12.5°C)	1.3°F (0.7°C)	25th Warmest	Warmest since: 2008	2012, 2017
	Ties: 1934, 1937, 2008
May 2010–Apr 2011 12-Month	56.8°F (13.8°C)	55.4°F (13.0°C)	1.4°F (0.8°C)	107th Coolest	Coolest since: 2010	1918
	56.8°F (13.8°C)	55.4°F (13.0°C)	1.4°F (0.8°C)	21st Warmest	Warmest since: 2008	2012, 2017
	Ties: 1919, 1921, 1922, 1981
Nov 2009–Apr 2011 18-Month	51.8°F (11.0°C)	50.5°F (10.3°C)	1.3°F (0.7°C)	104th Coolest	Coolest since: 2010	1979
	51.8°F (11.0°C)	50.5°F (10.3°C)	1.3°F (0.7°C)	23rd Warmest	Warmest since: 2008	2017
	Ties: 2020
May 2009–Apr 2011 24-Month	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	89th Coolest	Coolest since: 2010	1978
	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	38th Warmest	Warmest since: 2009	2017
	Ties: 1946, 1957
May 2008–Apr 2011 36-Month	55.8°F (13.2°C)	55.4°F (13.0°C)	0.4°F (0.2°C)	79th Coolest	Coolest since: 2010	1979
	55.8°F (13.2°C)	55.4°F (13.0°C)	0.4°F (0.2°C)	47th Warmest	Warmest since: 2010	2018
	Ties: 1915, 1946, 1987, 1990, 2010
May 2007–Apr 2011 48-Month	56.1°F (13.4°C)	55.4°F (13.0°C)	0.7°F (0.4°C)	95th Coolest	Coolest since: 2010	1980
	56.1°F (13.4°C)	55.4°F (13.0°C)	0.7°F (0.4°C)	30th Warmest	Warmest since: 2009	2019
	Ties: 1923, 1932, 1937, 1938, 1945, 1989, 2015
May 2006–Apr 2011 60-Month	56.1°F (13.4°C)	55.3°F (12.9°C)	0.8°F (0.5°C)	92nd Coolest	Coolest since: 2005	1980, 1981
	56.1°F (13.4°C)	55.3°F (12.9°C)	0.8°F (0.5°C)	32nd Warmest	Warmest since: 2010	2020
	Ties: 1925, 1937, 1941, 1955, 1991, 2000, 2005

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 29, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings