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 5. East

Average Temperature Rankings, May 2021

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Record Coolest
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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 2021 1-Month	60.2°F (15.7°C)	61.0°F (16.1°C)	-0.8°F (-0.4°C)	49th Coolest	Coolest since: 2020	1907
	60.2°F (15.7°C)	61.0°F (16.1°C)	-0.8°F (-0.4°C)	80th Warmest	Warmest since: 2019	2018
	Ties: 1952, 1992
Apr–May 2021 2-Month	55.9°F (13.3°C)	55.5°F (13.1°C)	0.4°F (0.2°C)	65th Coolest	Coolest since: 2020	1907
Apr–May 2021 2-Month	55.9°F (13.3°C)	55.5°F (13.1°C)	0.4°F (0.2°C)	64th Warmest	Warmest since: 2019	1977
Mar–May 2021 3-Month	52.1°F (11.2°C)	49.7°F (9.8°C)	2.4°F (1.4°C)	108th Coolest	Coolest since: 2020	1960
	52.1°F (11.2°C)	49.7°F (9.8°C)	2.4°F (1.4°C)	21st Warmest	Warmest since: 2017	2012
	Ties: 2006
Feb–May 2021 4-Month	43.9°F (6.6°C)	44.2°F (6.8°C)	-0.3°F (-0.2°C)	53rd Coolest	Coolest since: 2015	1978
	43.9°F (6.6°C)	44.2°F (6.8°C)	-0.3°F (-0.2°C)	76th Warmest	Warmest since: 2020	2012
	Ties: 1961, 1994
Jan–May 2021 5-Month	40.8°F (4.9°C)	40.1°F (4.5°C)	0.7°F (0.4°C)	79th Coolest	Coolest since: 2019	1978
	40.8°F (4.9°C)	40.1°F (4.5°C)	0.7°F (0.4°C)	50th Warmest	Warmest since: 2020	2012
	Ties: 1908, 1956, 1985
Dec 2020–May 2021 6-Month	39.4°F (4.1°C)	38.1°F (3.4°C)	1.3°F (0.7°C)	89th Coolest	Coolest since: 2019	1904, 1978
	39.4°F (4.1°C)	38.1°F (3.4°C)	1.3°F (0.7°C)	39th Warmest	Warmest since: 2020	2012
	Ties: 1931, 2010
Nov 2020–May 2021 7-Month	40.3°F (4.6°C)	38.3°F (3.5°C)	2.0°F (1.1°C)	104th Coolest	Coolest since: 2020	1904
	40.3°F (4.6°C)	38.3°F (3.5°C)	2.0°F (1.1°C)	24th Warmest	Warmest since: 2017	2012
	Ties: 1919, 1955, 2010
Oct 2020–May 2021 8-Month	41.7°F (5.4°C)	40.2°F (4.6°C)	1.5°F (0.8°C)	97th Coolest	Coolest since: 2019	1904
Oct 2020–May 2021 8-Month	41.7°F (5.4°C)	40.2°F (4.6°C)	1.5°F (0.8°C)	31st Warmest	Warmest since: 2020	2012
Sep 2020–May 2021 9-Month	44.3°F (6.8°C)	43.0°F (6.1°C)	1.3°F (0.7°C)	97th Coolest	Coolest since: 2019	1904
Sep 2020–May 2021 9-Month	44.3°F (6.8°C)	43.0°F (6.1°C)	1.3°F (0.7°C)	31st Warmest	Warmest since: 2020	2012
Aug 2020–May 2021 10-Month	47.0°F (8.3°C)	45.9°F (7.7°C)	1.1°F (0.6°C)	95th Coolest	Coolest since: 2019	1904
Aug 2020–May 2021 10-Month	47.0°F (8.3°C)	45.9°F (7.7°C)	1.1°F (0.6°C)	33rd Warmest	Warmest since: 2020	2012
Jul 2020–May 2021 11-Month	49.6°F (9.8°C)	48.5°F (9.2°C)	1.1°F (0.6°C)	100th Coolest	Coolest since: 2019	1904
	49.6°F (9.8°C)	48.5°F (9.2°C)	1.1°F (0.6°C)	28th Warmest	Warmest since: 2020	2012
	Ties: 1931, 1937, 1985, 1995
Jun 2020–May 2021 12-Month	51.6°F (10.9°C)	50.3°F (10.2°C)	1.3°F (0.7°C)	100th Coolest	Coolest since: 2019	1904
	51.6°F (10.9°C)	50.3°F (10.2°C)	1.3°F (0.7°C)	28th Warmest	Warmest since: 2020	2012
	Ties: 1935, 1949, 1972, 1995, 2013
Dec 2019–May 2021 18-Month	48.0°F (8.9°C)	46.2°F (7.9°C)	1.8°F (1.0°C)	108th Coolest	Coolest since: 2020	1905
	48.0°F (8.9°C)	46.2°F (7.9°C)	1.8°F (1.0°C)	19th Warmest	Warmest since: 2018	2017
	Ties: 1942, 2005
Jun 2019–May 2021 24-Month	51.7°F (10.9°C)	50.3°F (10.2°C)	1.4°F (0.7°C)	110th Coolest	Coolest since: 2020	1905
	51.7°F (10.9°C)	50.3°F (10.2°C)	1.4°F (0.7°C)	17th Warmest	Warmest since: 2018	2017
	Ties: 1935, 1942, 1991
Jun 2018–May 2021 36-Month	51.5°F (10.8°C)	50.3°F (10.2°C)	1.2°F (0.6°C)	102nd Coolest	Coolest since: 2020	1905, 1906
	51.5°F (10.8°C)	50.3°F (10.2°C)	1.2°F (0.6°C)	24th Warmest	Warmest since: 2019	2018
	Ties: 1987, 1991, 1993
Jun 2017–May 2021 48-Month	51.4°F (10.8°C)	50.3°F (10.2°C)	1.1°F (0.6°C)	98th Coolest	Coolest since: 2016	1905
	51.4°F (10.8°C)	50.3°F (10.2°C)	1.1°F (0.6°C)	27th Warmest	Warmest since: 2020	2019
	Ties: 1990
Jun 2016–May 2021 60-Month	52.1°F (11.2°C)	50.3°F (10.2°C)	1.8°F (1.0°C)	121st Coolest	Coolest since: 2019	1905, 1906, 1908
Jun 2016–May 2021 60-Month	52.1°F (11.2°C)	50.3°F (10.2°C)	1.8°F (1.0°C)	3rd Warmest	Warmest since: 2020	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2023, retrieved on March 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings