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 1940

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1940 1-Month	33.2°F (0.7°C)	28.3°F (-2.1°C)	4.9°F (2.8°C)	105th Coolest	Coolest since: 1938	1983
December 1940 1-Month	33.2°F (0.7°C)	28.3°F (-2.1°C)	4.9°F (2.8°C)	24th Warmest	Warmest since: 1939	2015
Nov–Dec 1940 2-Month	35.3°F (1.8°C)	34.3°F (1.3°C)	1.0°F (0.5°C)	76th Coolest	Coolest since: 1937	2000
	35.3°F (1.8°C)	34.3°F (1.3°C)	1.0°F (0.5°C)	53rd Warmest	Warmest since: 1939	1931
	Ties: 1907, 2002, 2022
Oct–Dec 1940 3-Month	43.2°F (6.2°C)	41.0°F (5.0°C)	2.2°F (1.2°C)	104th Coolest	Coolest since: 1937	1976
	43.2°F (6.2°C)	41.0°F (5.0°C)	2.2°F (1.2°C)	25th Warmest	Warmest since: 1939	1931
	Ties: 2003
Sep–Dec 1940 4-Month	48.9°F (9.4°C)	47.3°F (8.5°C)	1.6°F (0.9°C)	100th Coolest	Coolest since: 1937	1976
Sep–Dec 1940 4-Month	48.9°F (9.4°C)	47.3°F (8.5°C)	1.6°F (0.9°C)	29th Warmest	Warmest since: 1939	1931
Aug–Dec 1940 5-Month	53.8°F (12.1°C)	52.5°F (11.4°C)	1.3°F (0.7°C)	99th Coolest	Coolest since: 1937	1976
	53.8°F (12.1°C)	52.5°F (11.4°C)	1.3°F (0.7°C)	30th Warmest	Warmest since: 1939	1931
	Ties: 1921, 1930, 1933, 1948
Jul–Dec 1940 6-Month	57.7°F (14.3°C)	56.5°F (13.6°C)	1.2°F (0.7°C)	104th Coolest	Coolest since: 1937	1976
	57.7°F (14.3°C)	56.5°F (13.6°C)	1.2°F (0.7°C)	25th Warmest	Warmest since: 1939	1931
	Ties: 1922, 1994, 2005, 2012
Jun–Dec 1940 7-Month	59.9°F (15.5°C)	58.6°F (14.8°C)	1.3°F (0.7°C)	101st Coolest	Coolest since: 1937	1976
	59.9°F (15.5°C)	58.6°F (14.8°C)	1.3°F (0.7°C)	28th Warmest	Warmest since: 1939	1931
	Ties: 1930, 1994
May–Dec 1940 8-Month	59.9°F (15.5°C)	59.1°F (15.1°C)	0.8°F (0.4°C)	88th Coolest	Coolest since: 1937	1917
	59.9°F (15.5°C)	59.1°F (15.1°C)	0.8°F (0.4°C)	41st Warmest	Warmest since: 1939	1931
	Ties: 1947, 1959, 2006
Apr–Dec 1940 9-Month	58.7°F (14.8°C)	58.2°F (14.6°C)	0.5°F (0.2°C)	75th Coolest	Coolest since: 1937	1917
	58.7°F (14.8°C)	58.2°F (14.6°C)	0.5°F (0.2°C)	54th Warmest	Warmest since: 1939	1931
	Ties: 1923, 1952, 2019
Mar–Dec 1940 10-Month	56.4°F (13.6°C)	56.3°F (13.5°C)	0.1°F (0.1°C)	69th Coolest	Coolest since: 1937	1917
	56.4°F (13.6°C)	56.3°F (13.5°C)	0.1°F (0.1°C)	60th Warmest	Warmest since: 1939	2012
	Ties: 1899, 1952, 1965, 1970
Feb–Dec 1940 11-Month	53.8°F (12.1°C)	53.7°F (12.1°C)	0.1°F (0.0°C)	70th Coolest	Coolest since: 1937	1917
	53.8°F (12.1°C)	53.7°F (12.1°C)	0.1°F (0.0°C)	59th Warmest	Warmest since: 1939	2012
	Ties: 1897, 1900, 1914, 1942, 1970, 1983
Jan–Dec 1940 12-Month	50.2°F (10.1°C)	51.2°F (10.7°C)	-1.0°F (-0.6°C)	29th Coolest	Coolest since: 1937	1917
	50.2°F (10.1°C)	51.2°F (10.7°C)	-1.0°F (-0.6°C)	100th Warmest	Warmest since: 1939	2012
	Ties: 1902, 2013
Jul 1939–Dec 1940 18-Month	52.9°F (11.6°C)	53.0°F (11.7°C)	-0.1°F (-0.1°C)	57th Coolest	Coolest since: 1929	1904
	52.9°F (11.6°C)	53.0°F (11.7°C)	-0.1°F (-0.1°C)	71st Warmest	Warmest since: 1939	2012
	Ties: 1944, 1992, 2010
Jan 1939–Dec 1940 24-Month	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	85th Coolest	Coolest since: 1937	1979
	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	43rd Warmest	Warmest since: 1939	2017
	Ties: 1965, 1974, 2003
Jan 1938–Dec 1940 36-Month	52.5°F (11.4°C)	51.2°F (10.7°C)	1.3°F (0.7°C)	110th Coolest	Coolest since: 1939	1905
	52.5°F (11.4°C)	51.2°F (10.7°C)	1.3°F (0.7°C)	17th Warmest	Warmest since: 1935	2017
	Ties: 1956, 2001, 2013
Jan 1937–Dec 1940 48-Month	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	89th Coolest	Coolest since: 1938	1905
	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	37th Warmest	Warmest since: 1939	1934
	Ties: 1924, 1987, 1991, 2022
Jan 1936–Dec 1940 60-Month	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	91st Coolest	Coolest since: 1937	1905
	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	34th Warmest	Warmest since: 1939	1934
	Ties: 1937, 1988, 2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published May 2023, retrieved on June 4, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings