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 1966

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1966 1-Month	29.2°F (-1.6°C)	28.3°F (-2.1°C)	0.9°F (0.5°C)	62nd Coolest	Coolest since: 1964	1983
	29.2°F (-1.6°C)	28.3°F (-2.1°C)	0.9°F (0.5°C)	67th Warmest	Warmest since: 1965	2015
	Ties: 1992
Nov–Dec 1966 2-Month	36.0°F (2.2°C)	34.3°F (1.3°C)	1.7°F (0.9°C)	88th Coolest	Coolest since: 1964	2000
Nov–Dec 1966 2-Month	36.0°F (2.2°C)	34.3°F (1.3°C)	1.7°F (0.9°C)	41st Warmest	Warmest since: 1965	1931
Oct–Dec 1966 3-Month	41.4°F (5.2°C)	41.0°F (5.0°C)	0.4°F (0.2°C)	73rd Coolest	Coolest since: 1964	1976
	41.4°F (5.2°C)	41.0°F (5.0°C)	0.4°F (0.2°C)	56th Warmest	Warmest since: 1965	1931
	Ties: 1933, 1936
Sep–Dec 1966 4-Month	46.8°F (8.2°C)	47.3°F (8.5°C)	-0.5°F (-0.3°C)	44th Coolest	Coolest since: 1962	1976
	46.8°F (8.2°C)	47.3°F (8.5°C)	-0.5°F (-0.3°C)	85th Warmest	Warmest since: 1965	1931
	Ties: 1959, 1962, 1981
Aug–Dec 1966 5-Month	51.6°F (10.9°C)	52.5°F (11.4°C)	-0.9°F (-0.5°C)	34th Coolest	Coolest since: 1951	1976
	51.6°F (10.9°C)	52.5°F (11.4°C)	-0.9°F (-0.5°C)	95th Warmest	Warmest since: 1965	1931
	Ties: 1995
Jul–Dec 1966 6-Month	56.1°F (13.4°C)	56.5°F (13.6°C)	-0.4°F (-0.2°C)	49th Coolest	Coolest since: 1962	1976
	56.1°F (13.4°C)	56.5°F (13.6°C)	-0.4°F (-0.2°C)	80th Warmest	Warmest since: 1965	1931
	Ties: 1905
Jun–Dec 1966 7-Month	58.1°F (14.5°C)	58.6°F (14.8°C)	-0.5°F (-0.3°C)	45th Coolest	Coolest since: 1962	1976
	58.1°F (14.5°C)	58.6°F (14.8°C)	-0.5°F (-0.3°C)	84th Warmest	Warmest since: 1965	1931
	Ties: 1895, 1962, 2004
May–Dec 1966 8-Month	58.1°F (14.5°C)	59.1°F (15.1°C)	-1.0°F (-0.6°C)	34th Coolest	Coolest since: 1961	1917
	58.1°F (14.5°C)	59.1°F (15.1°C)	-1.0°F (-0.6°C)	95th Warmest	Warmest since: 1965	1931
	Ties: 1968, 1995, 2013
Apr–Dec 1966 9-Month	57.0°F (13.9°C)	58.2°F (14.6°C)	-1.2°F (-0.7°C)	25th Coolest	Coolest since: 1961	1917
	57.0°F (13.9°C)	58.2°F (14.6°C)	-1.2°F (-0.7°C)	104th Warmest	Warmest since: 1965	1931
	Ties: 1985, 1997
Mar–Dec 1966 10-Month	55.5°F (13.1°C)	56.3°F (13.5°C)	-0.8°F (-0.4°C)	31st Coolest	Coolest since: 1961	1917
	55.5°F (13.1°C)	56.3°F (13.5°C)	-0.8°F (-0.4°C)	98th Warmest	Warmest since: 1965	2012
	Ties: 1997
Feb–Dec 1966 11-Month	53.1°F (11.7°C)	53.7°F (12.1°C)	-0.6°F (-0.4°C)	40th Coolest	Coolest since: 1961	1917
	53.1°F (11.7°C)	53.7°F (12.1°C)	-0.6°F (-0.4°C)	89th Warmest	Warmest since: 1965	2012
	Ties: 1947, 1992
Jan–Dec 1966 12-Month	50.3°F (10.2°C)	51.2°F (10.7°C)	-0.9°F (-0.5°C)	32nd Coolest	Coolest since: 1960	1917
Jan–Dec 1966 12-Month	50.3°F (10.2°C)	51.2°F (10.7°C)	-0.9°F (-0.5°C)	97th Warmest	Warmest since: 1965	2012
Jul 1965–Dec 1966 18-Month	52.7°F (11.5°C)	53.0°F (11.7°C)	-0.3°F (-0.2°C)	44th Coolest	Coolest since: 1963	1904
	52.7°F (11.5°C)	53.0°F (11.7°C)	-0.3°F (-0.2°C)	84th Warmest	Warmest since: 1965	2012
	Ties: 1906, 1909, 1927, 1986, 1994, 2008, 2013
Jan 1965–Dec 1966 24-Month	50.8°F (10.4°C)	51.2°F (10.7°C)	-0.4°F (-0.3°C)	42nd Coolest	Coolest since: 1963	1979
	50.8°F (10.4°C)	51.2°F (10.7°C)	-0.4°F (-0.3°C)	86th Warmest	Warmest since: 1965	2017
	Ties: 1912, 1927, 1950, 1976, 1983
Jan 1964–Dec 1966 36-Month	51.2°F (10.7°C)	51.2°F (10.7°C)	0.0°F (0.0°C)	59th Coolest	Coolest since: 1964	1905
	51.2°F (10.7°C)	51.2°F (10.7°C)	0.0°F (0.0°C)	68th Warmest	Warmest since: 1965	2017
	Ties: 1911, 1920, 1930, 1944, 1958, 1964, 1973, 2009, 2014
Jan 1963–Dec 1966 48-Month	51.1°F (10.6°C)	51.2°F (10.7°C)	-0.1°F (-0.1°C)	48th Coolest	Coolest since: 1964	1905
	51.1°F (10.6°C)	51.2°F (10.7°C)	-0.1°F (-0.1°C)	78th Warmest	Warmest since: 1965	1934
	Ties: 1899, 1915, 1928, 1973, 1975, 1983, 1984
Jan 1962–Dec 1966 60-Month	51.0°F (10.6°C)	51.2°F (10.7°C)	-0.2°F (-0.1°C)	43rd Coolest	Coolest since: 1964	1905
	51.0°F (10.6°C)	51.2°F (10.7°C)	-0.2°F (-0.1°C)	82nd Warmest	Warmest since: 1965	1934
	Ties: 1912, 1930, 1960, 1986

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2023, retrieved on March 24, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings