Statewide 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

Average Temperature Rankings, September 2019

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 2019 1-Month	71.6°F (22.0°C)	66.2°F (19.0°C)	5.4°F (3.0°C)	125th Coolest	Coolest since: 2018	1918
September 2019 1-Month	71.6°F (22.0°C)	66.2°F (19.0°C)	5.4°F (3.0°C)	4th Warmest	Warmest since: 1933	1925, 1933
Aug–Sep 2019 2-Month	72.2°F (22.3°C)	69.8°F (21.0°C)	2.4°F (1.3°C)	110th Coolest	Coolest since: 2017	1967
	72.2°F (22.3°C)	69.8°F (21.0°C)	2.4°F (1.3°C)	19th Warmest	Warmest since: 2018	1936
	Ties: 1938, 1941, 1960, 2002
Jul–Sep 2019 3-Month	73.9°F (23.3°C)	71.7°F (22.1°C)	2.2°F (1.2°C)	115th Coolest	Coolest since: 2018	1967
	73.9°F (23.3°C)	71.7°F (22.1°C)	2.2°F (1.2°C)	14th Warmest	Warmest since: 2016	1936
	Ties: 1900, 2010
Jun–Sep 2019 4-Month	73.2°F (22.9°C)	71.7°F (22.1°C)	1.5°F (0.8°C)	104th Coolest	Coolest since: 2017	1915, 1924
	73.2°F (22.9°C)	71.7°F (22.1°C)	1.5°F (0.8°C)	25th Warmest	Warmest since: 2018	1936
	Ties: 1987, 1998, 2012
May–Sep 2019 5-Month	71.0°F (21.7°C)	69.7°F (20.9°C)	1.3°F (0.8°C)	95th Coolest	Coolest since: 2017	1924
	71.0°F (21.7°C)	69.7°F (20.9°C)	1.3°F (0.8°C)	34th Warmest	Warmest since: 2018	1936
	Ties: 2021, 2022
Apr–Sep 2019 6-Month	67.9°F (19.9°C)	66.7°F (19.3°C)	1.2°F (0.6°C)	97th Coolest	Coolest since: 2017	1907
	67.9°F (19.9°C)	66.7°F (19.3°C)	1.2°F (0.6°C)	32nd Warmest	Warmest since: 2018	2010
	Ties: 1944, 1980, 2015, 2021
Mar–Sep 2019 7-Month	63.6°F (17.6°C)	62.9°F (17.2°C)	0.7°F (0.4°C)	87th Coolest	Coolest since: 2014	1924
	63.6°F (17.6°C)	62.9°F (17.2°C)	0.7°F (0.4°C)	42nd Warmest	Warmest since: 2018	2012
	Ties: 1931
Feb–Sep 2019 8-Month	59.3°F (15.2°C)	58.7°F (14.8°C)	0.6°F (0.4°C)	81st Coolest	Coolest since: 2015	1904
	59.3°F (15.2°C)	58.7°F (14.8°C)	0.6°F (0.4°C)	48th Warmest	Warmest since: 2018	2012
	Ties: 1896, 1995, 2004, 2021
Jan–Sep 2019 9-Month	55.5°F (13.1°C)	54.9°F (12.7°C)	0.6°F (0.4°C)	80th Coolest	Coolest since: 2015	1904, 1912
	55.5°F (13.1°C)	54.9°F (12.7°C)	0.6°F (0.4°C)	49th Warmest	Warmest since: 2018	2012
	Ties: 1949, 1976, 1995
Dec 2018–Sep 2019 10-Month	53.4°F (11.9°C)	52.4°F (11.3°C)	1.0°F (0.6°C)	89th Coolest	Coolest since: 2015	1904
	53.4°F (11.9°C)	52.4°F (11.3°C)	1.0°F (0.6°C)	39th Warmest	Warmest since: 2018	2012
	Ties: 1896, 1944
Nov 2018–Sep 2019 11-Month	51.8°F (11.0°C)	51.4°F (10.8°C)	0.4°F (0.2°C)	77th Coolest	Coolest since: 2015	1904
	51.8°F (11.0°C)	51.4°F (10.8°C)	0.4°F (0.2°C)	51st Warmest	Warmest since: 2018	2012
	Ties: 1952, 1957
Oct 2018–Sep 2019 12-Month	52.0°F (11.1°C)	51.6°F (10.9°C)	0.4°F (0.2°C)	75th Coolest	Coolest since: 2015	1904
	52.0°F (11.1°C)	51.6°F (10.9°C)	0.4°F (0.2°C)	53rd Warmest	Warmest since: 2018	2012
	Ties: 1901, 1944, 1946, 1959, 1985, 1992, 2013
Apr 2018–Sep 2019 18-Month	57.5°F (14.2°C)	56.7°F (13.7°C)	0.8°F (0.5°C)	94th Coolest	Coolest since: 2015	1904, 1918
	57.5°F (14.2°C)	56.7°F (13.7°C)	0.8°F (0.5°C)	34th Warmest	Warmest since: 2018	2012
	Ties: 1937, 1983, 1995, 2021
Oct 2017–Sep 2019 24-Month	52.5°F (11.4°C)	51.7°F (10.9°C)	0.8°F (0.5°C)	93rd Coolest	Coolest since: 2015	1979
	52.5°F (11.4°C)	51.7°F (10.9°C)	0.8°F (0.5°C)	34th Warmest	Warmest since: 2018	2017
	Ties: 1921
Oct 2016–Sep 2019 36-Month	53.3°F (11.8°C)	51.6°F (10.9°C)	1.7°F (0.9°C)	115th Coolest	Coolest since: 2016	1979
	53.3°F (11.8°C)	51.6°F (10.9°C)	1.7°F (0.9°C)	11th Warmest	Warmest since: 2018	2018
	Ties: 2002
Oct 2015–Sep 2019 48-Month	53.8°F (12.1°C)	51.6°F (10.9°C)	2.2°F (1.2°C)	124th Coolest	Coolest since: 2018	1905
Oct 2015–Sep 2019 48-Month	53.8°F (12.1°C)	51.6°F (10.9°C)	2.2°F (1.2°C)	1st Warmest	Warmest to Date	2019
Oct 2014–Sep 2019 60-Month	53.3°F (11.8°C)	51.6°F (10.9°C)	1.7°F (0.9°C)	121st Coolest	Coolest since: 2018	1906
Oct 2014–Sep 2019 60-Month	53.3°F (11.8°C)	51.6°F (10.9°C)	1.7°F (0.9°C)	3rd Warmest	Warmest since: 2002	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 6, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings