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 3. West

Average Temperature Rankings, December 2009

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 2009 1-Month	27.4°F (-2.6°C)	28.3°F (-2.1°C)	-0.9°F (-0.5°C)	53rd Coolest	Coolest since: 2008	1983
December 2009 1-Month	27.4°F (-2.6°C)	28.3°F (-2.1°C)	-0.9°F (-0.5°C)	76th Warmest	Warmest since: 2006	2015
Nov–Dec 2009 2-Month	37.1°F (2.8°C)	34.3°F (1.3°C)	2.8°F (1.5°C)	101st Coolest	Coolest since: 2008	2000
	37.1°F (2.8°C)	34.3°F (1.3°C)	2.8°F (1.5°C)	28th Warmest	Warmest since: 2006	1931
	Ties: 1939, 1990
Oct–Dec 2009 3-Month	40.9°F (4.9°C)	41.0°F (5.0°C)	-0.1°F (-0.1°C)	60th Coolest	Coolest since: 2008	1976
	40.9°F (4.9°C)	41.0°F (5.0°C)	-0.1°F (-0.1°C)	69th Warmest	Warmest since: 2007	1931
	Ties: 1952
Sep–Dec 2009 4-Month	47.0°F (8.3°C)	47.3°F (8.5°C)	-0.3°F (-0.2°C)	52nd Coolest	Coolest since: 2008	1976
	47.0°F (8.3°C)	47.3°F (8.5°C)	-0.3°F (-0.2°C)	77th Warmest	Warmest since: 2007	1931
	Ties: 1902
Aug–Dec 2009 5-Month	51.7°F (10.9°C)	52.5°F (11.4°C)	-0.8°F (-0.5°C)	36th Coolest	Coolest since: 2008	1976
	51.7°F (10.9°C)	52.5°F (11.4°C)	-0.8°F (-0.5°C)	93rd Warmest	Warmest since: 2007	1931
	Ties: 1902, 1904, 1909, 1942, 1981
Jul–Dec 2009 6-Month	54.7°F (12.6°C)	56.5°F (13.6°C)	-1.8°F (-1.0°C)	18th Coolest	Coolest since: 2000	1976
Jul–Dec 2009 6-Month	54.7°F (12.6°C)	56.5°F (13.6°C)	-1.8°F (-1.0°C)	111th Warmest	Warmest since: 2008	1931
Jun–Dec 2009 7-Month	57.2°F (14.0°C)	58.6°F (14.8°C)	-1.4°F (-0.8°C)	21st Coolest	Coolest since: 2000	1976
	57.2°F (14.0°C)	58.6°F (14.8°C)	-1.4°F (-0.8°C)	108th Warmest	Warmest since: 2008	1931
	Ties: 1974, 1993, 2014
May–Dec 2009 8-Month	57.9°F (14.4°C)	59.1°F (15.1°C)	-1.2°F (-0.7°C)	26th Coolest	Coolest since: 2008	1917
	57.9°F (14.4°C)	59.1°F (15.1°C)	-1.2°F (-0.7°C)	103rd Warmest	Warmest since: 2007	1931
	Ties: 1909, 1926
Apr–Dec 2009 9-Month	57.1°F (13.9°C)	58.2°F (14.6°C)	-1.1°F (-0.7°C)	28th Coolest	Coolest since: 2008	1917
	57.1°F (13.9°C)	58.2°F (14.6°C)	-1.1°F (-0.7°C)	101st Warmest	Warmest since: 2007	1931
	Ties: 1995, 2013
Mar–Dec 2009 10-Month	55.6°F (13.1°C)	56.3°F (13.5°C)	-0.7°F (-0.4°C)	33rd Coolest	Coolest since: 2008	1917
	55.6°F (13.1°C)	56.3°F (13.5°C)	-0.7°F (-0.4°C)	96th Warmest	Warmest since: 2007	2012
	Ties: 1906, 1929, 1978, 1995
Feb–Dec 2009 11-Month	53.4°F (11.9°C)	53.7°F (12.1°C)	-0.3°F (-0.2°C)	49th Coolest	Coolest since: 2008	1917
	53.4°F (11.9°C)	53.7°F (12.1°C)	-0.3°F (-0.2°C)	80th Warmest	Warmest since: 2007	2012
	Ties: 1915, 1980, 1997
Jan–Dec 2009 12-Month	50.6°F (10.3°C)	51.2°F (10.7°C)	-0.6°F (-0.4°C)	39th Coolest	Coolest since: 2008	1917
	50.6°F (10.3°C)	51.2°F (10.7°C)	-0.6°F (-0.4°C)	90th Warmest	Warmest since: 2007	2012
	Ties: 1898, 1962, 1995
Jul 2008–Dec 2009 18-Month	52.1°F (11.2°C)	53.0°F (11.7°C)	-0.9°F (-0.5°C)	25th Coolest	Coolest since: 1997	1904
	52.1°F (11.2°C)	53.0°F (11.7°C)	-0.9°F (-0.5°C)	103rd Warmest	Warmest since: 2008	2012
	Ties: 1950
Jan 2008–Dec 2009 24-Month	50.3°F (10.2°C)	51.2°F (10.7°C)	-0.9°F (-0.5°C)	17th Coolest	Coolest since: 1997	1979
	50.3°F (10.2°C)	51.2°F (10.7°C)	-0.9°F (-0.5°C)	111th Warmest	Warmest since: 2008	2017
	Ties: 1968, 1969, 1970
Jan 2007–Dec 2009 36-Month	51.2°F (10.7°C)	51.2°F (10.7°C)	0.0°F (0.0°C)	68th Coolest	Coolest since: 1997	1905
	51.2°F (10.7°C)	51.2°F (10.7°C)	0.0°F (0.0°C)	59th Warmest	Warmest since: 2008	2017
	Ties: 1911, 1920, 1930, 1944, 1958, 1964, 1966, 1973, 2014
Jan 2006–Dec 2009 48-Month	51.8°F (11.0°C)	51.2°F (10.7°C)	0.6°F (0.3°C)	84th Coolest	Coolest since: 1999	1905
	51.8°F (11.0°C)	51.2°F (10.7°C)	0.6°F (0.3°C)	42nd Warmest	Warmest since: 2008	1934
	Ties: 1992, 1993, 1999
Jan 2005–Dec 2009 60-Month	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	102nd Coolest	Coolest since: 2004	1905
	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	23rd Warmest	Warmest since: 2008	1934
	Ties: 2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2023, retrieved on March 25, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings