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 2018

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 2018 1-Month	32.8°F (0.4°C)	28.3°F (-2.1°C)	4.5°F (2.5°C)	101st Coolest	Coolest since: 2017	1983
	32.8°F (0.4°C)	28.3°F (-2.1°C)	4.5°F (2.5°C)	28th Warmest	Warmest since: 2015	2015
	Ties: 1911
Nov–Dec 2018 2-Month	33.6°F (0.9°C)	34.3°F (1.3°C)	-0.7°F (-0.4°C)	44th Coolest	Coolest since: 2014	2000
	33.6°F (0.9°C)	34.3°F (1.3°C)	-0.7°F (-0.4°C)	85th Warmest	Warmest since: 2017	1931
	Ties: 1895, 2010
Oct–Dec 2018 3-Month	39.9°F (4.4°C)	41.0°F (5.0°C)	-1.1°F (-0.6°C)	34th Coolest	Coolest since: 2014	1976
	39.9°F (4.4°C)	41.0°F (5.0°C)	-1.1°F (-0.6°C)	95th Warmest	Warmest since: 2017	1931
	Ties: 1959, 1993
Sep–Dec 2018 4-Month	47.4°F (8.6°C)	47.3°F (8.5°C)	0.1°F (0.1°C)	61st Coolest	Coolest since: 2014	1976
	47.4°F (8.6°C)	47.3°F (8.5°C)	0.1°F (0.1°C)	68th Warmest	Warmest since: 2017	1931
	Ties: 1964, 2010
Aug–Dec 2018 5-Month	52.9°F (11.6°C)	52.5°F (11.4°C)	0.4°F (0.2°C)	69th Coolest	Coolest since: 2014	1976
	52.9°F (11.6°C)	52.5°F (11.4°C)	0.4°F (0.2°C)	60th Warmest	Warmest since: 2017	1931
	Ties: 1905, 1959, 1970
Jul–Dec 2018 6-Month	56.6°F (13.7°C)	56.4°F (13.6°C)	0.2°F (0.1°C)	63rd Coolest	Coolest since: 2014	1976
	56.6°F (13.7°C)	56.4°F (13.6°C)	0.2°F (0.1°C)	66th Warmest	Warmest since: 2017	1931
	Ties: 1963, 1970
Jun–Dec 2018 7-Month	59.3°F (15.2°C)	58.6°F (14.8°C)	0.7°F (0.4°C)	82nd Coolest	Coolest since: 2017	1976
	59.3°F (15.2°C)	58.6°F (14.8°C)	0.7°F (0.4°C)	47th Warmest	Warmest since: 2016	1931
	Ties: 1897, 1948, 2019
May–Dec 2018 8-Month	60.8°F (16.0°C)	59.0°F (15.0°C)	1.8°F (1.0°C)	111th Coolest	Coolest since: 2017	1917
	60.8°F (16.0°C)	59.0°F (15.0°C)	1.8°F (1.0°C)	18th Warmest	Warmest since: 2016	1931
	Ties: 1900, 1938
Apr–Dec 2018 9-Month	58.9°F (14.9°C)	58.2°F (14.6°C)	0.7°F (0.3°C)	86th Coolest	Coolest since: 2014	1917
	58.9°F (14.9°C)	58.2°F (14.6°C)	0.7°F (0.3°C)	43rd Warmest	Warmest since: 2017	1931
	Ties: 1911, 1912, 1918, 1946, 1959, 1963, 1977, 1980
Mar–Dec 2018 10-Month	56.9°F (13.8°C)	56.3°F (13.5°C)	0.6°F (0.3°C)	82nd Coolest	Coolest since: 2014	1917
	56.9°F (13.8°C)	56.3°F (13.5°C)	0.6°F (0.3°C)	47th Warmest	Warmest since: 2017	2012
	Ties: 1959, 2020
Feb–Dec 2018 11-Month	54.3°F (12.4°C)	53.7°F (12.1°C)	0.6°F (0.3°C)	83rd Coolest	Coolest since: 2014	1917
	54.3°F (12.4°C)	53.7°F (12.1°C)	0.6°F (0.3°C)	46th Warmest	Warmest since: 2017	2012
	Ties: 1952
Jan–Dec 2018 12-Month	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	83rd Coolest	Coolest since: 2014	1917
	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	46th Warmest	Warmest since: 2017	2012
	Ties: 1900, 1944, 1971, 1983, 2000
Jul 2017–Dec 2018 18-Month	53.5°F (11.9°C)	53.0°F (11.7°C)	0.5°F (0.2°C)	85th Coolest	Coolest since: 2015	1904
	53.5°F (11.9°C)	53.0°F (11.7°C)	0.5°F (0.2°C)	43rd Warmest	Warmest since: 2017	2012
	Ties: 1923, 1983
Jan 2017–Dec 2018 24-Month	52.7°F (11.5°C)	51.2°F (10.7°C)	1.5°F (0.8°C)	112th Coolest	Coolest since: 2015	1979
	52.7°F (11.5°C)	51.2°F (10.7°C)	1.5°F (0.8°C)	16th Warmest	Warmest since: 2017	2017
	Ties: 1921, 1953, 2021
Jan 2016–Dec 2018 36-Month	53.2°F (11.8°C)	51.2°F (10.7°C)	2.0°F (1.1°C)	124th Coolest	Coolest since: 2016	1905
	53.2°F (11.8°C)	51.2°F (10.7°C)	2.0°F (1.1°C)	3rd Warmest	Warmest since: 2017	2017
	Ties: 1933
Jan 2015–Dec 2018 48-Month	53.0°F (11.7°C)	51.2°F (10.7°C)	1.8°F (1.0°C)	123rd Coolest	Coolest since: 2017	1905
	53.0°F (11.7°C)	51.2°F (10.7°C)	1.8°F (1.0°C)	3rd Warmest	Warmest since: 2001	1934
	Ties: 2001
Jan 2014–Dec 2018 60-Month	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	102nd Coolest	Coolest since: 2017	1905
	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	23rd Warmest	Warmest since: 2009	1934
	Ties: 2009

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