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 2015

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 2015 1-Month	39.4°F (4.1°C)	28.3°F (-2.1°C)	11.1°F (6.2°C)	128th Coolest	Coolest since: 2014	1983
December 2015 1-Month	39.4°F (4.1°C)	28.3°F (-2.1°C)	11.1°F (6.2°C)	1st Warmest	Warmest to Date	2015
Nov–Dec 2015 2-Month	42.6°F (5.9°C)	34.2°F (1.2°C)	8.4°F (4.7°C)	127th Coolest	Coolest since: 2014	2000
	42.6°F (5.9°C)	34.2°F (1.2°C)	8.4°F (4.7°C)	2nd Warmest	Warmest since: 2001	1931
	Ties: 2001
Oct–Dec 2015 3-Month	46.9°F (8.3°C)	41.0°F (5.0°C)	5.9°F (3.3°C)	127th Coolest	Coolest since: 2014	1976
Oct–Dec 2015 3-Month	46.9°F (8.3°C)	41.0°F (5.0°C)	5.9°F (3.3°C)	2nd Warmest	Warmest since: 1931	1931
Sep–Dec 2015 4-Month	52.9°F (11.6°C)	47.2°F (8.4°C)	5.7°F (3.2°C)	127th Coolest	Coolest since: 2014	1976
Sep–Dec 2015 4-Month	52.9°F (11.6°C)	47.2°F (8.4°C)	5.7°F (3.2°C)	2nd Warmest	Warmest since: 1931	1931
Aug–Dec 2015 5-Month	56.6°F (13.7°C)	52.5°F (11.4°C)	4.1°F (2.3°C)	127th Coolest	Coolest since: 2014	1976
	56.6°F (13.7°C)	52.5°F (11.4°C)	4.1°F (2.3°C)	2nd Warmest	Warmest since: 1931	1931
	Ties: 2021
Jul–Dec 2015 6-Month	59.5°F (15.3°C)	56.5°F (13.6°C)	3.0°F (1.7°C)	124th Coolest	Coolest since: 2014	1976
Jul–Dec 2015 6-Month	59.5°F (15.3°C)	56.5°F (13.6°C)	3.0°F (1.7°C)	5th Warmest	Warmest since: 1936	1931
Jun–Dec 2015 7-Month	61.2°F (16.2°C)	58.6°F (14.8°C)	2.6°F (1.4°C)	120th Coolest	Coolest since: 2014	1976
Jun–Dec 2015 7-Month	61.2°F (16.2°C)	58.6°F (14.8°C)	2.6°F (1.4°C)	9th Warmest	Warmest since: 1953	1931
May–Dec 2015 8-Month	61.6°F (16.4°C)	59.1°F (15.1°C)	2.5°F (1.3°C)	122nd Coolest	Coolest since: 2014	1917
	61.6°F (16.4°C)	59.1°F (15.1°C)	2.5°F (1.3°C)	7th Warmest	Warmest since: 1998	1931
	Ties: 2016
Apr–Dec 2015 9-Month	60.8°F (16.0°C)	58.2°F (14.6°C)	2.6°F (1.4°C)	124th Coolest	Coolest since: 2014	1917
Apr–Dec 2015 9-Month	60.8°F (16.0°C)	58.2°F (14.6°C)	2.6°F (1.4°C)	5th Warmest	Warmest since: 1941	1931
Mar–Dec 2015 10-Month	58.6°F (14.8°C)	56.3°F (13.5°C)	2.3°F (1.3°C)	119th Coolest	Coolest since: 2014	1917
	58.6°F (14.8°C)	56.3°F (13.5°C)	2.3°F (1.3°C)	10th Warmest	Warmest since: 2012	2012
	Ties: 1934, 2007
Feb–Dec 2015 11-Month	54.9°F (12.7°C)	53.7°F (12.1°C)	1.2°F (0.6°C)	100th Coolest	Coolest since: 2014	1917
	54.9°F (12.7°C)	53.7°F (12.1°C)	1.2°F (0.6°C)	29th Warmest	Warmest since: 2012	2012
	Ties: 1918, 1933, 1977
Jan–Dec 2015 12-Month	52.4°F (11.3°C)	51.3°F (10.7°C)	1.1°F (0.6°C)	101st Coolest	Coolest since: 2014	1917
	52.4°F (11.3°C)	51.3°F (10.7°C)	1.1°F (0.6°C)	28th Warmest	Warmest since: 2012	2012
	Ties: 1911, 1956, 2020
Jul 2014–Dec 2015 18-Month	53.1°F (11.7°C)	53.0°F (11.7°C)	0.1°F (0.0°C)	69th Coolest	Coolest since: 2014	1904
	53.1°F (11.7°C)	53.0°F (11.7°C)	0.1°F (0.0°C)	59th Warmest	Warmest since: 2012	2012
	Ties: 1928, 1974
Jan 2014–Dec 2015 24-Month	50.5°F (10.3°C)	51.3°F (10.7°C)	-0.8°F (-0.4°C)	22nd Coolest	Coolest since: 2014	1979
	50.5°F (10.3°C)	51.3°F (10.7°C)	-0.8°F (-0.4°C)	106th Warmest	Warmest since: 2013	2017
	Ties: 1899, 1906, 1929, 1959, 1960, 1962
Jan 2013–Dec 2015 36-Month	50.4°F (10.2°C)	51.2°F (10.7°C)	-0.8°F (-0.5°C)	19th Coolest	Coolest since: 1997	1905
	50.4°F (10.2°C)	51.2°F (10.7°C)	-0.8°F (-0.5°C)	108th Warmest	Warmest since: 2014	2017
	Ties: 1970
Jan 2012–Dec 2015 48-Month	51.5°F (10.8°C)	51.2°F (10.7°C)	0.3°F (0.1°C)	75th Coolest	Coolest since: 2014	1905
	51.5°F (10.8°C)	51.2°F (10.7°C)	0.3°F (0.1°C)	51st Warmest	Warmest since: 2014	1934
	Ties: 1916, 1948, 2014
Jan 2011–Dec 2015 60-Month	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	80th Coolest	Coolest since: 2014	1905
	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	45th Warmest	Warmest since: 2013	1934
	Ties: 1924, 1943, 1949, 1994

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