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 8. Southwest

Average Temperature Rankings, April 1991

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 1991 1-Month	59.2°F (15.1°C)	55.3°F (12.9°C)	3.9°F (2.2°C)	116th Coolest	Coolest since: 1990	1907
	59.2°F (15.1°C)	55.3°F (12.9°C)	3.9°F (2.2°C)	13th Warmest	Warmest since: 1981	1896
	Ties: 1967
Mar–Apr 1991 2-Month	54.0°F (12.2°C)	50.0°F (10.0°C)	4.0°F (2.2°C)	116th Coolest	Coolest since: 1990	1926, 1960
	54.0°F (12.2°C)	50.0°F (10.0°C)	4.0°F (2.2°C)	13th Warmest	Warmest since: 1985	2012
	Ties: 1985, 2006
Feb–Apr 1991 3-Month	49.2°F (9.6°C)	45.0°F (7.2°C)	4.2°F (2.4°C)	119th Coolest	Coolest since: 1990	1899
Feb–Apr 1991 3-Month	49.2°F (9.6°C)	45.0°F (7.2°C)	4.2°F (2.4°C)	10th Warmest	Warmest since: 1976	2012
Jan–Apr 1991 4-Month	44.1°F (6.7°C)	41.5°F (5.3°C)	2.6°F (1.4°C)	109th Coolest	Coolest since: 1989	1978
	44.1°F (6.7°C)	41.5°F (5.3°C)	2.6°F (1.4°C)	20th Warmest	Warmest since: 1990	2012
	Ties: 1927
Dec 1990–Apr 1991 5-Month	42.4°F (5.8°C)	40.1°F (4.5°C)	2.3°F (1.3°C)	106th Coolest	Coolest since: 1990	1978
	42.4°F (5.8°C)	40.1°F (4.5°C)	2.3°F (1.3°C)	22nd Warmest	Warmest since: 1976	2012
	Ties: 1925
Nov 1990–Apr 1991 6-Month	43.8°F (6.6°C)	40.9°F (4.9°C)	2.9°F (1.7°C)	117th Coolest	Coolest since: 1990	1912
	43.8°F (6.6°C)	40.9°F (4.9°C)	2.9°F (1.7°C)	11th Warmest	Warmest since: 1976	2012
	Ties: 1999
Oct 1990–Apr 1991 7-Month	45.4°F (7.4°C)	43.2°F (6.2°C)	2.2°F (1.2°C)	109th Coolest	Coolest since: 1990	1899, 1978
	45.4°F (7.4°C)	43.2°F (6.2°C)	2.2°F (1.2°C)	19th Warmest	Warmest since: 1976	2012
	Ties: 2004, 2022
Sep 1990–Apr 1991 8-Month	48.6°F (9.2°C)	46.5°F (8.1°C)	2.1°F (1.1°C)	112th Coolest	Coolest since: 1990	1918
	48.6°F (9.2°C)	46.5°F (8.1°C)	2.1°F (1.1°C)	16th Warmest	Warmest since: 1974	2017
	Ties: 2022
Aug 1990–Apr 1991 9-Month	51.5°F (10.8°C)	49.8°F (9.9°C)	1.7°F (0.9°C)	108th Coolest	Coolest since: 1990	1918
	51.5°F (10.8°C)	49.8°F (9.9°C)	1.7°F (0.9°C)	20th Warmest	Warmest since: 1976	2017
	Ties: 1946, 2005, 2008
Jul 1990–Apr 1991 10-Month	54.0°F (12.2°C)	52.6°F (11.4°C)	1.4°F (0.8°C)	107th Coolest	Coolest since: 1990	1918
	54.0°F (12.2°C)	52.6°F (11.4°C)	1.4°F (0.8°C)	21st Warmest	Warmest since: 1981	2012
	Ties: 2004
Jun 1990–Apr 1991 11-Month	55.9°F (13.3°C)	54.5°F (12.5°C)	1.4°F (0.8°C)	106th Coolest	Coolest since: 1990	1918
	55.9°F (13.3°C)	54.5°F (12.5°C)	1.4°F (0.8°C)	22nd Warmest	Warmest since: 1981	2012, 2017
	Ties: 1953, 1976
May 1990–Apr 1991 12-Month	56.4°F (13.6°C)	55.4°F (13.0°C)	1.0°F (0.6°C)	95th Coolest	Coolest since: 1990	1918
	56.4°F (13.6°C)	55.4°F (13.0°C)	1.0°F (0.6°C)	33rd Warmest	Warmest since: 1987	2012, 2017
	Ties: 1914, 1923, 1938, 1987
Nov 1989–Apr 1991 18-Month	51.7°F (10.9°C)	50.6°F (10.3°C)	1.1°F (0.6°C)	102nd Coolest	Coolest since: 1990	1979
	51.7°F (10.9°C)	50.6°F (10.3°C)	1.1°F (0.6°C)	25th Warmest	Warmest since: 1955	2017
	Ties: 2001
May 1989–Apr 1991 24-Month	55.9°F (13.3°C)	55.4°F (13.0°C)	0.5°F (0.3°C)	86th Coolest	Coolest since: 1990	1978
	55.9°F (13.3°C)	55.4°F (13.0°C)	0.5°F (0.3°C)	41st Warmest	Warmest since: 1989	2017
	Ties: 1953, 2004
May 1988–Apr 1991 36-Month	55.9°F (13.3°C)	55.3°F (12.9°C)	0.6°F (0.4°C)	86th Coolest	Coolest since: 1990	1979
	55.9°F (13.3°C)	55.3°F (12.9°C)	0.6°F (0.4°C)	40th Warmest	Warmest since: 1989	2018
	Ties: 1936, 1937, 1942, 1976, 1993, 2003
May 1987–Apr 1991 48-Month	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	87th Coolest	Coolest since: 1990	1980
	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	38th Warmest	Warmest since: 1990	2019
	Ties: 1990, 2004
May 1986–Apr 1991 60-Month	56.1°F (13.4°C)	55.4°F (13.0°C)	0.7°F (0.4°C)	92nd Coolest	Coolest since: 1990	1980, 1981
	56.1°F (13.4°C)	55.4°F (13.0°C)	0.7°F (0.4°C)	32nd Warmest	Warmest since: 1958	2020
	Ties: 1925, 1937, 1941, 1955, 2000, 2005, 2011

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on February 7, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings