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 1991

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 1991 1-Month	55.8°F (13.2°C)	51.3°F (10.7°C)	4.5°F (2.5°C)	115th Coolest	Coolest since: 1990	2018
April 1991 1-Month	55.8°F (13.2°C)	51.3°F (10.7°C)	4.5°F (2.5°C)	14th Warmest	Warmest since: 1986	2010
Mar–Apr 1991 2-Month	49.9°F (9.9°C)	45.2°F (7.3°C)	4.7°F (2.6°C)	118th Coolest	Coolest since: 1990	1960
Mar–Apr 1991 2-Month	49.9°F (9.9°C)	45.2°F (7.3°C)	4.7°F (2.6°C)	11th Warmest	Warmest since: 1985	2012
Feb–Apr 1991 3-Month	44.4°F (6.9°C)	39.5°F (4.2°C)	4.9°F (2.7°C)	120th Coolest	Coolest since: 1990	1899
Feb–Apr 1991 3-Month	44.4°F (6.9°C)	39.5°F (4.2°C)	4.9°F (2.7°C)	9th Warmest	Warmest since: 1987	2012
Jan–Apr 1991 4-Month	38.6°F (3.7°C)	35.6°F (2.0°C)	3.0°F (1.7°C)	110th Coolest	Coolest since: 1989	1912
	38.6°F (3.7°C)	35.6°F (2.0°C)	3.0°F (1.7°C)	19th Warmest	Warmest since: 1990	2012
	Ties: 1981
Dec 1990–Apr 1991 5-Month	36.4°F (2.4°C)	34.2°F (1.2°C)	2.2°F (1.2°C)	103rd Coolest	Coolest since: 1990	1978
Dec 1990–Apr 1991 5-Month	36.4°F (2.4°C)	34.2°F (1.2°C)	2.2°F (1.2°C)	25th Warmest	Warmest since: 1987	2012
Nov 1990–Apr 1991 6-Month	38.1°F (3.4°C)	35.2°F (1.8°C)	2.9°F (1.6°C)	115th Coolest	Coolest since: 1990	1904, 1912, 1978
	38.1°F (3.4°C)	35.2°F (1.8°C)	2.9°F (1.6°C)	13th Warmest	Warmest since: 1976	2012
	Ties: 1919, 1998
Oct 1990–Apr 1991 7-Month	40.2°F (4.6°C)	37.9°F (3.3°C)	2.3°F (1.3°C)	111th Coolest	Coolest since: 1990	1912
	40.2°F (4.6°C)	37.9°F (3.3°C)	2.3°F (1.3°C)	17th Warmest	Warmest since: 1987	2012
	Ties: 1939, 1992
Sep 1990–Apr 1991 8-Month	43.6°F (6.4°C)	41.5°F (5.3°C)	2.1°F (1.1°C)	111th Coolest	Coolest since: 1990	1904, 1978
Sep 1990–Apr 1991 8-Month	43.6°F (6.4°C)	41.5°F (5.3°C)	2.1°F (1.1°C)	17th Warmest	Warmest since: 1987	2017
Aug 1990–Apr 1991 9-Month	46.9°F (8.3°C)	45.0°F (7.2°C)	1.9°F (1.1°C)	112th Coolest	Coolest since: 1990	1978
	46.9°F (8.3°C)	45.0°F (7.2°C)	1.9°F (1.1°C)	16th Warmest	Warmest since: 1976	2017
	Ties: 1998, 2005
Jul 1990–Apr 1991 10-Month	49.7°F (9.8°C)	48.1°F (8.9°C)	1.6°F (0.9°C)	108th Coolest	Coolest since: 1990	1904
	49.7°F (9.8°C)	48.1°F (8.9°C)	1.6°F (0.9°C)	20th Warmest	Warmest since: 1987	2012
	Ties: 1919, 1992, 1998
Jun 1990–Apr 1991 11-Month	51.7°F (10.9°C)	50.3°F (10.2°C)	1.4°F (0.7°C)	104th Coolest	Coolest since: 1990	1904
Jun 1990–Apr 1991 11-Month	51.7°F (10.9°C)	50.3°F (10.2°C)	1.4°F (0.7°C)	24th Warmest	Warmest since: 1987	2017
May 1990–Apr 1991 12-Month	52.2°F (11.2°C)	51.3°F (10.7°C)	0.9°F (0.5°C)	96th Coolest	Coolest since: 1990	1918
	52.2°F (11.2°C)	51.3°F (10.7°C)	0.9°F (0.5°C)	32nd Warmest	Warmest since: 1989	2017
	Ties: 1988, 2008, 2022
Nov 1989–Apr 1991 18-Month	47.1°F (8.4°C)	45.9°F (7.7°C)	1.2°F (0.7°C)	102nd Coolest	Coolest since: 1990	1979
	47.1°F (8.4°C)	45.9°F (7.7°C)	1.2°F (0.7°C)	25th Warmest	Warmest since: 1988	2017
	Ties: 2022
May 1989–Apr 1991 24-Month	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	89th Coolest	Coolest since: 1987	1905
	51.9°F (11.1°C)	51.2°F (10.7°C)	0.7°F (0.4°C)	38th Warmest	Warmest since: 1990	2017
	Ties: 1957
May 1988–Apr 1991 36-Month	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	96th Coolest	Coolest since: 1990	1979
	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	30th Warmest	Warmest since: 1990	2018
	Ties: 1943, 1990, 2022
May 1987–Apr 1991 48-Month	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	97th Coolest	Coolest since: 1989	1980
	52.1°F (11.2°C)	51.2°F (10.7°C)	0.9°F (0.5°C)	28th Warmest	Warmest since: 1990	1935
	Ties: 1941, 2022
May 1986–Apr 1991 60-Month	52.3°F (11.3°C)	51.2°F (10.7°C)	1.1°F (0.6°C)	111th Coolest	Coolest since: 1990	1906, 1979
	52.3°F (11.3°C)	51.2°F (10.7°C)	1.1°F (0.6°C)	13th Warmest	Warmest since: 1957	1935
	Ties: 1923, 1941, 2007

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2023, retrieved on March 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings