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 2017

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 2017 1-Month	29.1°F (-1.6°C)	28.3°F (-2.1°C)	0.8°F (0.5°C)	61st Coolest	Coolest since: 2016	1983
December 2017 1-Month	29.1°F (-1.6°C)	28.3°F (-2.1°C)	0.8°F (0.5°C)	68th Warmest	Warmest since: 2015	2015
Nov–Dec 2017 2-Month	34.7°F (1.5°C)	34.2°F (1.2°C)	0.5°F (0.3°C)	65th Coolest	Coolest since: 2014	2000
Nov–Dec 2017 2-Month	34.7°F (1.5°C)	34.2°F (1.2°C)	0.5°F (0.3°C)	64th Warmest	Warmest since: 2016	1931
Oct–Dec 2017 3-Month	42.2°F (5.7°C)	41.0°F (5.0°C)	1.2°F (0.7°C)	83rd Coolest	Coolest since: 2014	1976
Oct–Dec 2017 3-Month	42.2°F (5.7°C)	41.0°F (5.0°C)	1.2°F (0.7°C)	46th Warmest	Warmest since: 2016	1931
Sep–Dec 2017 4-Month	48.8°F (9.3°C)	47.2°F (8.4°C)	1.6°F (0.9°C)	99th Coolest	Coolest since: 2014	1976
	48.8°F (9.3°C)	47.2°F (8.4°C)	1.6°F (0.9°C)	30th Warmest	Warmest since: 2016	1931
	Ties: 1908, 1912, 1921, 1927, 1984
Aug–Dec 2017 5-Month	53.1°F (11.7°C)	52.6°F (11.4°C)	0.5°F (0.3°C)	74th Coolest	Coolest since: 2014	1976
	53.1°F (11.7°C)	52.6°F (11.4°C)	0.5°F (0.3°C)	55th Warmest	Warmest since: 2016	1931
	Ties: 1906
Jul–Dec 2017 6-Month	56.9°F (13.8°C)	56.4°F (13.6°C)	0.5°F (0.2°C)	72nd Coolest	Coolest since: 2014	1976
	56.9°F (13.8°C)	56.4°F (13.6°C)	0.5°F (0.2°C)	57th Warmest	Warmest since: 2016	1931
	Ties: 1955, 1957
Jun–Dec 2017 7-Month	59.2°F (15.1°C)	58.6°F (14.8°C)	0.6°F (0.3°C)	78th Coolest	Coolest since: 2014	1976
	59.2°F (15.1°C)	58.6°F (14.8°C)	0.6°F (0.3°C)	51st Warmest	Warmest since: 2016	1931
	Ties: 1920, 1952, 1990
May–Dec 2017 8-Month	59.5°F (15.3°C)	59.0°F (15.0°C)	0.5°F (0.3°C)	74th Coolest	Coolest since: 2014	1917
	59.5°F (15.3°C)	59.0°F (15.0°C)	0.5°F (0.3°C)	55th Warmest	Warmest since: 2016	1931
	Ties: 1946, 1952, 2022
Apr–Dec 2017 9-Month	59.1°F (15.1°C)	58.2°F (14.6°C)	0.9°F (0.5°C)	90th Coolest	Coolest since: 2014	1917
	59.1°F (15.1°C)	58.2°F (14.6°C)	0.9°F (0.5°C)	39th Warmest	Warmest since: 2016	1931
	Ties: 1955
Mar–Dec 2017 10-Month	57.4°F (14.1°C)	56.2°F (13.4°C)	1.2°F (0.7°C)	96th Coolest	Coolest since: 2014	1917
	57.4°F (14.1°C)	56.2°F (13.4°C)	1.2°F (0.7°C)	33rd Warmest	Warmest since: 2016	2012
	Ties: 1949, 1963, 1986, 1994
Feb–Dec 2017 11-Month	55.9°F (13.3°C)	53.7°F (12.1°C)	2.2°F (1.2°C)	121st Coolest	Coolest since: 2015	1917
	55.9°F (13.3°C)	53.7°F (12.1°C)	2.2°F (1.2°C)	8th Warmest	Warmest since: 2016	2012
	Ties: 1930
Jan–Dec 2017 12-Month	53.7°F (12.1°C)	51.2°F (10.7°C)	2.5°F (1.4°C)	121st Coolest	Coolest since: 2015	1917
Jan–Dec 2017 12-Month	53.7°F (12.1°C)	51.2°F (10.7°C)	2.5°F (1.4°C)	8th Warmest	Warmest since: 2016	2012
Jul 2016–Dec 2017 18-Month	55.5°F (13.1°C)	52.9°F (11.6°C)	2.6°F (1.5°C)	124th Coolest	Coolest since: 2015	1904
	55.5°F (13.1°C)	52.9°F (11.6°C)	2.6°F (1.5°C)	4th Warmest	Warmest since: 2016	2012
	Ties: 1921
Jan 2016–Dec 2017 24-Month	53.9°F (12.2°C)	51.2°F (10.7°C)	2.7°F (1.5°C)	127th Coolest	Coolest since: 2016	1979
Jan 2016–Dec 2017 24-Month	53.9°F (12.2°C)	51.2°F (10.7°C)	2.7°F (1.5°C)	1st Warmest	Warmest to Date	2017
Jan 2015–Dec 2017 36-Month	53.4°F (11.9°C)	51.2°F (10.7°C)	2.2°F (1.2°C)	126th Coolest	Coolest since: 2016	1905
Jan 2015–Dec 2017 36-Month	53.4°F (11.9°C)	51.2°F (10.7°C)	2.2°F (1.2°C)	1st Warmest	Warmest to Date	2017
Jan 2014–Dec 2017 48-Month	52.2°F (11.2°C)	51.2°F (10.7°C)	1.0°F (0.5°C)	103rd Coolest	Coolest since: 2016	1905
	52.2°F (11.2°C)	51.2°F (10.7°C)	1.0°F (0.5°C)	23rd Warmest	Warmest since: 2013	1934
	Ties: 1990, 2005
Jan 2013–Dec 2017 60-Month	51.8°F (11.0°C)	51.2°F (10.7°C)	0.6°F (0.3°C)	88th Coolest	Coolest since: 2015	1905
	51.8°F (11.0°C)	51.2°F (10.7°C)	0.6°F (0.3°C)	37th Warmest	Warmest since: 2016	1934
	Ties: 1925, 1958, 1987, 1992, 2000, 2010, 2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on February 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings