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, May 2021

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 2021 1-Month	60.6°F (15.9°C)	62.3°F (16.8°C)	-1.7°F (-0.9°C)	39th Coolest	Coolest since: 2020	1924
May 2021 1-Month	60.6°F (15.9°C)	62.3°F (16.8°C)	-1.7°F (-0.9°C)	90th Warmest	Warmest since: 2019	2018
Apr–May 2021 2-Month	56.1°F (13.4°C)	56.8°F (13.8°C)	-0.7°F (-0.4°C)	46th Coolest	Coolest since: 2020	1907
Apr–May 2021 2-Month	56.1°F (13.4°C)	56.8°F (13.8°C)	-0.7°F (-0.4°C)	83rd Warmest	Warmest since: 2019	1896
Mar–May 2021 3-Month	52.6°F (11.4°C)	50.9°F (10.5°C)	1.7°F (0.9°C)	98th Coolest	Coolest since: 2020	1960
	52.6°F (11.4°C)	50.9°F (10.5°C)	1.7°F (0.9°C)	31st Warmest	Warmest since: 2017	2012
	Ties: 1911, 1929
Feb–May 2021 4-Month	44.0°F (6.7°C)	45.2°F (7.3°C)	-1.2°F (-0.6°C)	40th Coolest	Coolest since: 2019	1978
	44.0°F (6.7°C)	45.2°F (7.3°C)	-1.2°F (-0.6°C)	89th Warmest	Warmest since: 2020	2012
	Ties: 1902, 1971
Jan–May 2021 5-Month	40.8°F (4.9°C)	40.9°F (4.9°C)	-0.1°F (0.0°C)	63rd Coolest	Coolest since: 2019	1978
	40.8°F (4.9°C)	40.9°F (4.9°C)	-0.1°F (0.0°C)	66th Warmest	Warmest since: 2020	2012
	Ties: 1967, 1989
Dec 2020–May 2021 6-Month	39.3°F (4.1°C)	38.9°F (3.8°C)	0.4°F (0.3°C)	77th Coolest	Coolest since: 2019	1978
	39.3°F (4.1°C)	38.9°F (3.8°C)	0.4°F (0.3°C)	51st Warmest	Warmest since: 2020	2012
	Ties: 1928, 1995
Nov 2020–May 2021 7-Month	40.3°F (4.6°C)	39.0°F (3.9°C)	1.3°F (0.7°C)	94th Coolest	Coolest since: 2019	1978
	40.3°F (4.6°C)	39.0°F (3.9°C)	1.3°F (0.7°C)	34th Warmest	Warmest since: 2020	2012
	Ties: 1922
Oct 2020–May 2021 8-Month	41.6°F (5.3°C)	41.0°F (5.0°C)	0.6°F (0.3°C)	79th Coolest	Coolest since: 2019	1978
	41.6°F (5.3°C)	41.0°F (5.0°C)	0.6°F (0.3°C)	49th Warmest	Warmest since: 2020	2012
	Ties: 1908, 1953
Sep 2020–May 2021 9-Month	44.1°F (6.7°C)	43.7°F (6.5°C)	0.4°F (0.2°C)	76th Coolest	Coolest since: 2019	1978
	44.1°F (6.7°C)	43.7°F (6.5°C)	0.4°F (0.2°C)	52nd Warmest	Warmest since: 2020	2012
	Ties: 1925, 1935
Aug 2020–May 2021 10-Month	47.0°F (8.3°C)	46.7°F (8.2°C)	0.3°F (0.1°C)	70th Coolest	Coolest since: 2019	1978
	47.0°F (8.3°C)	46.7°F (8.2°C)	0.3°F (0.1°C)	58th Warmest	Warmest since: 2020	2012
	Ties: 1900, 1915, 1988
Jul 2020–May 2021 11-Month	49.7°F (9.8°C)	49.4°F (9.7°C)	0.3°F (0.1°C)	72nd Coolest	Coolest since: 2019	1904
	49.7°F (9.8°C)	49.4°F (9.7°C)	0.3°F (0.1°C)	56th Warmest	Warmest since: 2020	2012
	Ties: 1908, 1923, 1950, 2011, 2013
Jun 2020–May 2021 12-Month	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	80th Coolest	Coolest since: 2019	1904
	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	48th Warmest	Warmest since: 2020	2012
	Ties: 1923, 1950, 2011, 2018
Dec 2019–May 2021 18-Month	48.2°F (9.0°C)	47.1°F (8.4°C)	1.1°F (0.6°C)	101st Coolest	Coolest since: 2020	1979
Dec 2019–May 2021 18-Month	48.2°F (9.0°C)	47.1°F (8.4°C)	1.1°F (0.6°C)	26th Warmest	Warmest since: 2018	2017
Jun 2019–May 2021 24-Month	52.0°F (11.1°C)	51.2°F (10.7°C)	0.8°F (0.4°C)	96th Coolest	Coolest since: 2020	1905
	52.0°F (11.1°C)	51.2°F (10.7°C)	0.8°F (0.4°C)	31st Warmest	Warmest since: 2018	2017
	Ties: 1989, 2008, 2016
Jun 2018–May 2021 36-Month	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	82nd Coolest	Coolest since: 2020	1979
	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	44th Warmest	Warmest since: 2020	2018
	Ties: 1944, 1976, 1993, 2020
Jun 2017–May 2021 48-Month	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	83rd Coolest	Coolest since: 2016	1980
	51.7°F (10.9°C)	51.2°F (10.7°C)	0.5°F (0.2°C)	42nd Warmest	Warmest since: 2020	1935
	Ties: 1936, 1943, 1945, 1987, 1993
Jun 2016–May 2021 60-Month	52.4°F (11.3°C)	51.2°F (10.7°C)	1.2°F (0.6°C)	116th Coolest	Coolest since: 2019	1906, 1907, 1979
	52.4°F (11.3°C)	51.2°F (10.7°C)	1.2°F (0.6°C)	8th Warmest	Warmest since: 2020	1935
	Ties: 1936, 1942, 2003, 2007, 2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published November 2022, retrieved on December 3, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings