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, April 1999

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 1999 1-Month	54.0°F (12.2°C)	51.3°F (10.7°C)	2.7°F (1.5°C)	101st Coolest	Coolest since: 1998	2018
April 1999 1-Month	54.0°F (12.2°C)	51.3°F (10.7°C)	2.7°F (1.5°C)	28th Warmest	Warmest since: 1991	2010
Mar–Apr 1999 2-Month	46.1°F (7.8°C)	45.2°F (7.3°C)	0.9°F (0.5°C)	77th Coolest	Coolest since: 1998	1960
	46.1°F (7.8°C)	45.2°F (7.3°C)	0.9°F (0.5°C)	52nd Warmest	Warmest since: 1994	2012
	Ties: 1954
Feb–Apr 1999 3-Month	43.0°F (6.1°C)	39.5°F (4.2°C)	3.5°F (1.9°C)	110th Coolest	Coolest since: 1997	1899
Feb–Apr 1999 3-Month	43.0°F (6.1°C)	39.5°F (4.2°C)	3.5°F (1.9°C)	19th Warmest	Warmest since: 1998	2012
Jan–Apr 1999 4-Month	37.9°F (3.3°C)	35.6°F (2.0°C)	2.3°F (1.3°C)	103rd Coolest	Coolest since: 1997	1912
	37.9°F (3.3°C)	35.6°F (2.0°C)	2.3°F (1.3°C)	26th Warmest	Warmest since: 1998	2012
	Ties: 1910, 1932, 1945, 1986
Dec 1998–Apr 1999 5-Month	37.1°F (2.8°C)	34.2°F (1.2°C)	2.9°F (1.6°C)	109th Coolest	Coolest since: 1997	1978
Dec 1998–Apr 1999 5-Month	37.1°F (2.8°C)	34.2°F (1.2°C)	2.9°F (1.6°C)	19th Warmest	Warmest since: 1998	2012
Nov 1998–Apr 1999 6-Month	38.4°F (3.6°C)	35.2°F (1.8°C)	3.2°F (1.8°C)	116th Coolest	Coolest since: 1998	1904, 1912, 1978
Nov 1998–Apr 1999 6-Month	38.4°F (3.6°C)	35.2°F (1.8°C)	3.2°F (1.8°C)	12th Warmest	Warmest since: 1976	2012
Oct 1998–Apr 1999 7-Month	40.9°F (4.9°C)	37.9°F (3.3°C)	3.0°F (1.6°C)	117th Coolest	Coolest since: 1998	1912
	40.9°F (4.9°C)	37.9°F (3.3°C)	3.0°F (1.6°C)	11th Warmest	Warmest since: 1976	2012
	Ties: 2005
Sep 1998–Apr 1999 8-Month	44.6°F (7.0°C)	41.5°F (5.3°C)	3.1°F (1.7°C)	119th Coolest	Coolest since: 1998	1904, 1978
	44.6°F (7.0°C)	41.5°F (5.3°C)	3.1°F (1.7°C)	9th Warmest	Warmest since: 1954	2017
	Ties: 1954
Aug 1998–Apr 1999 9-Month	48.0°F (8.9°C)	45.0°F (7.2°C)	3.0°F (1.7°C)	121st Coolest	Coolest since: 1998	1978
	48.0°F (8.9°C)	45.0°F (7.2°C)	3.0°F (1.7°C)	7th Warmest	Warmest since: 1954	2017
	Ties: 1954, 2002
Jul 1998–Apr 1999 10-Month	50.8°F (10.4°C)	48.1°F (8.9°C)	2.7°F (1.5°C)	118th Coolest	Coolest since: 1998	1904
Jul 1998–Apr 1999 10-Month	50.8°F (10.4°C)	48.1°F (8.9°C)	2.7°F (1.5°C)	10th Warmest	Warmest since: 1954	2012
Jun 1998–Apr 1999 11-Month	52.6°F (11.4°C)	50.3°F (10.2°C)	2.3°F (1.2°C)	119th Coolest	Coolest since: 1998	1904
	52.6°F (11.4°C)	50.3°F (10.2°C)	2.3°F (1.2°C)	9th Warmest	Warmest since: 1954	2017
	Ties: 1935, 1942, 2002
May 1998–Apr 1999 12-Month	53.8°F (12.1°C)	51.3°F (10.7°C)	2.5°F (1.4°C)	120th Coolest	Coolest since: 1998	1918
	53.8°F (12.1°C)	51.3°F (10.7°C)	2.5°F (1.4°C)	8th Warmest	Warmest since: 1954	2017
	Ties: 1942
Nov 1997–Apr 1999 18-Month	48.6°F (9.2°C)	45.9°F (7.7°C)	2.7°F (1.5°C)	123rd Coolest	Coolest since: 1998	1979
	48.6°F (9.2°C)	45.9°F (7.7°C)	2.7°F (1.5°C)	4th Warmest	Warmest since: 1932	2017
	Ties: 2000, 2013
May 1997–Apr 1999 24-Month	53.0°F (11.7°C)	51.2°F (10.7°C)	1.8°F (1.0°C)	116th Coolest	Coolest since: 1998	1905
	53.0°F (11.7°C)	51.2°F (10.7°C)	1.8°F (1.0°C)	11th Warmest	Warmest since: 1955	2017
	Ties: 1954, 2007, 2018
May 1996–Apr 1999 36-Month	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	89th Coolest	Coolest since: 1998	1979
	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	37th Warmest	Warmest since: 1992	2018
	Ties: 1988
May 1995–Apr 1999 48-Month	51.4°F (10.8°C)	51.2°F (10.7°C)	0.2°F (0.1°C)	71st Coolest	Coolest since: 1998	1980
	51.4°F (10.8°C)	51.2°F (10.7°C)	0.2°F (0.1°C)	54th Warmest	Warmest since: 1993	1935
	Ties: 1917, 1954, 1966, 1967, 1974, 2015
May 1994–Apr 1999 60-Month	51.5°F (10.8°C)	51.2°F (10.7°C)	0.3°F (0.1°C)	72nd Coolest	Coolest since: 1998	1906, 1979
	51.5°F (10.8°C)	51.2°F (10.7°C)	0.3°F (0.1°C)	52nd Warmest	Warmest since: 1993	1935
	Ties: 1922, 1940, 1954, 1959, 2015

Citing This Page

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