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 1979

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1979 1-Month	33.1°F (0.6°C)	28.3°F (-2.1°C)	4.8°F (2.7°C)	104th Coolest	Coolest since: 1978	1983
December 1979 1-Month	33.1°F (0.6°C)	28.3°F (-2.1°C)	4.8°F (2.7°C)	25th Warmest	Warmest since: 1971	2015
Nov–Dec 1979 2-Month	36.4°F (2.4°C)	34.3°F (1.3°C)	2.1°F (1.1°C)	94th Coolest	Coolest since: 1978	2000
	36.4°F (2.4°C)	34.3°F (1.3°C)	2.1°F (1.1°C)	35th Warmest	Warmest since: 1975	1931
	Ties: 1899
Oct–Dec 1979 3-Month	42.4°F (5.8°C)	41.0°F (5.0°C)	1.4°F (0.8°C)	89th Coolest	Coolest since: 1978	1976
	42.4°F (5.8°C)	41.0°F (5.0°C)	1.4°F (0.8°C)	40th Warmest	Warmest since: 1975	1931
	Ties: 1915, 1954, 1973
Sep–Dec 1979 4-Month	48.3°F (9.1°C)	47.3°F (8.5°C)	1.0°F (0.6°C)	82nd Coolest	Coolest since: 1978	1976
	48.3°F (9.1°C)	47.3°F (8.5°C)	1.0°F (0.6°C)	47th Warmest	Warmest since: 1975	1931
	Ties: 1930, 2020
Aug–Dec 1979 5-Month	53.3°F (11.8°C)	52.6°F (11.4°C)	0.7°F (0.4°C)	84th Coolest	Coolest since: 1978	1976
	53.3°F (11.8°C)	52.6°F (11.4°C)	0.7°F (0.4°C)	45th Warmest	Warmest since: 1975	1931
	Ties: 1934, 1960, 1987, 1988
Jul–Dec 1979 6-Month	56.7°F (13.7°C)	56.4°F (13.6°C)	0.3°F (0.1°C)	67th Coolest	Coolest since: 1978	1976
	56.7°F (13.7°C)	56.4°F (13.6°C)	0.3°F (0.1°C)	62nd Warmest	Warmest since: 1975	1931
	Ties: 1960
Jun–Dec 1979 7-Month	58.9°F (14.9°C)	58.6°F (14.8°C)	0.3°F (0.1°C)	68th Coolest	Coolest since: 1978	1976
	58.9°F (14.9°C)	58.6°F (14.8°C)	0.3°F (0.1°C)	61st Warmest	Warmest since: 1975	1931
	Ties: 1901, 1912, 1959, 2022
May–Dec 1979 8-Month	59.4°F (15.2°C)	59.1°F (15.1°C)	0.3°F (0.1°C)	70th Coolest	Coolest since: 1978	1917
	59.4°F (15.2°C)	59.1°F (15.1°C)	0.3°F (0.1°C)	59th Warmest	Warmest since: 1975	1931
	Ties: 1908, 1920, 1957, 1963, 1970, 1986
Apr–Dec 1979 9-Month	58.1°F (14.5°C)	58.2°F (14.6°C)	-0.1°F (-0.1°C)	50th Coolest	Coolest since: 1976	1917
	58.1°F (14.5°C)	58.2°F (14.6°C)	-0.1°F (-0.1°C)	79th Warmest	Warmest since: 1978	1931
	Ties: 1942, 1960, 1982, 1990
Mar–Dec 1979 10-Month	56.2°F (13.4°C)	56.3°F (13.5°C)	-0.1°F (-0.1°C)	56th Coolest	Coolest since: 1978	1917
	56.2°F (13.4°C)	56.3°F (13.5°C)	-0.1°F (-0.1°C)	73rd Warmest	Warmest since: 1977	2012
	Ties: 1895, 1897, 1910, 1947
Feb–Dec 1979 11-Month	52.6°F (11.4°C)	53.8°F (12.1°C)	-1.2°F (-0.7°C)	22nd Coolest	Coolest since: 1978	1917
	52.6°F (11.4°C)	53.8°F (12.1°C)	-1.2°F (-0.7°C)	107th Warmest	Warmest since: 1977	2012
	Ties: 1907
Jan–Dec 1979 12-Month	49.0°F (9.4°C)	51.2°F (10.7°C)	-2.2°F (-1.3°C)	6th Coolest	Coolest since: 1978	1917
Jan–Dec 1979 12-Month	49.0°F (9.4°C)	51.2°F (10.7°C)	-2.2°F (-1.3°C)	123rd Warmest	Warmest since: 1977	2012
Jul 1978–Dec 1979 18-Month	51.5°F (10.8°C)	53.0°F (11.7°C)	-1.5°F (-0.9°C)	8th Coolest	Coolest since: 1978	1904
	51.5°F (10.8°C)	53.0°F (11.7°C)	-1.5°F (-0.9°C)	120th Warmest	Warmest since: 1977	2012
	Ties: 1912, 1926, 1977
Jan 1978–Dec 1979 24-Month	48.9°F (9.4°C)	51.2°F (10.7°C)	-2.3°F (-1.3°C)	1st Coolest	Coolest since: 1979	1979
Jan 1978–Dec 1979 24-Month	48.9°F (9.4°C)	51.2°F (10.7°C)	-2.3°F (-1.3°C)	127th Warmest	Warmest since: 1978	2017
Jan 1977–Dec 1979 36-Month	49.7°F (9.8°C)	51.3°F (10.7°C)	-1.6°F (-0.9°C)	4th Coolest	Coolest since: 1905	1905
Jan 1977–Dec 1979 36-Month	49.7°F (9.8°C)	51.3°F (10.7°C)	-1.6°F (-0.9°C)	123rd Warmest	Warmest since: 1978	2017
Jan 1976–Dec 1979 48-Month	49.8°F (9.9°C)	51.2°F (10.7°C)	-1.4°F (-0.8°C)	2nd Coolest	Coolest since: 1906	1905
	49.8°F (9.9°C)	51.2°F (10.7°C)	-1.4°F (-0.8°C)	124th Warmest	Warmest since: 1978	1934
	Ties: 1904, 1906
Jan 1975–Dec 1979 60-Month	50.1°F (10.1°C)	51.2°F (10.7°C)	-1.1°F (-0.6°C)	5th Coolest	Coolest since: 1907	1905
	50.1°F (10.1°C)	51.2°F (10.7°C)	-1.1°F (-0.6°C)	120th Warmest	Warmest since: 1978	1934
	Ties: 1982

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published February 2023, retrieved on February 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings