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 1981

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 1981 1-Month	64.5°F (18.1°C)	66.2°F (19.0°C)	-1.7°F (-0.9°C)	31st Coolest	Coolest since: 1976	1918
	64.5°F (18.1°C)	66.2°F (19.0°C)	-1.7°F (-0.9°C)	98th Warmest	Warmest since: 1980	1925, 1933
	Ties: 1950
Aug–Sep 1981 2-Month	68.3°F (20.2°C)	69.8°F (21.0°C)	-1.5°F (-0.8°C)	22nd Coolest	Coolest since: 1976	1967
	68.3°F (20.2°C)	69.8°F (21.0°C)	-1.5°F (-0.8°C)	107th Warmest	Warmest since: 1980	1936
	Ties: 1896, 1903, 1962, 1993
Jul–Sep 1981 3-Month	70.4°F (21.3°C)	71.7°F (22.1°C)	-1.3°F (-0.8°C)	21st Coolest	Coolest since: 1976	1967
	70.4°F (21.3°C)	71.7°F (22.1°C)	-1.3°F (-0.8°C)	108th Warmest	Warmest since: 1980	1936
	Ties: 1965, 1982
Jun–Sep 1981 4-Month	71.0°F (21.7°C)	71.7°F (22.1°C)	-0.7°F (-0.4°C)	41st Coolest	Coolest since: 1979	1915, 1924
	71.0°F (21.7°C)	71.7°F (22.1°C)	-0.7°F (-0.4°C)	88th Warmest	Warmest since: 1980	1936
	Ties: 1979
May–Sep 1981 5-Month	68.5°F (20.3°C)	69.7°F (20.9°C)	-1.2°F (-0.6°C)	23rd Coolest	Coolest since: 1976	1924
	68.5°F (20.3°C)	69.7°F (20.9°C)	-1.2°F (-0.6°C)	106th Warmest	Warmest since: 1980	1936
	Ties: 1902, 2009
Apr–Sep 1981 6-Month	66.6°F (19.2°C)	66.7°F (19.3°C)	-0.1°F (-0.1°C)	51st Coolest	Coolest since: 1979	1907
	66.6°F (19.2°C)	66.7°F (19.3°C)	-0.1°F (-0.1°C)	78th Warmest	Warmest since: 1980	2010
	Ties: 1905, 1916, 1971, 1973, 2020
Mar–Sep 1981 7-Month	62.9°F (17.2°C)	62.9°F (17.2°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1979	1924
	62.9°F (17.2°C)	62.9°F (17.2°C)	0.0°F (0.0°C)	72nd Warmest	Warmest since: 1980	2012
	Ties: 1918, 1949, 1956, 1957
Feb–Sep 1981 8-Month	59.0°F (15.0°C)	58.7°F (14.8°C)	0.3°F (0.2°C)	74th Coolest	Coolest since: 1980	1904
	59.0°F (15.0°C)	58.7°F (14.8°C)	0.3°F (0.2°C)	55th Warmest	Warmest since: 1977	2012
	Ties: 1908, 1948
Jan–Sep 1981 9-Month	55.2°F (12.9°C)	54.9°F (12.7°C)	0.3°F (0.2°C)	68th Coolest	Coolest since: 1980	1904, 1912
	55.2°F (12.9°C)	54.9°F (12.7°C)	0.3°F (0.2°C)	61st Warmest	Warmest since: 1977	2012
	Ties: 1956
Dec 1980–Sep 1981 10-Month	52.8°F (11.6°C)	52.4°F (11.3°C)	0.4°F (0.3°C)	73rd Coolest	Coolest since: 1980	1904
	52.8°F (11.6°C)	52.4°F (11.3°C)	0.4°F (0.3°C)	55th Warmest	Warmest since: 1976	2012
	Ties: 1898
Nov 1980–Sep 1981 11-Month	51.7°F (10.9°C)	51.4°F (10.8°C)	0.3°F (0.1°C)	74th Coolest	Coolest since: 1980	1904
	51.7°F (10.9°C)	51.4°F (10.8°C)	0.3°F (0.1°C)	54th Warmest	Warmest since: 1976	2012
	Ties: 1935, 1992, 2011
Oct 1980–Sep 1981 12-Month	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	60th Coolest	Coolest since: 1980	1904
	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	68th Warmest	Warmest since: 1980	2012
	Ties: 1980
Apr 1980–Sep 1981 18-Month	57.1°F (13.9°C)	56.7°F (13.7°C)	0.4°F (0.2°C)	77th Coolest	Coolest since: 1980	1904, 1918
	57.1°F (13.9°C)	56.7°F (13.7°C)	0.4°F (0.2°C)	51st Warmest	Warmest since: 1976	2012
	Ties: 1900, 1923, 1972
Oct 1979–Sep 1981 24-Month	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	58th Coolest	Coolest since: 1980	1979
	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	69th Warmest	Warmest since: 1976	2017
	Ties: 1909, 1911, 1915, 1920, 1936, 1944, 1990
Oct 1978–Sep 1981 36-Month	50.8°F (10.4°C)	51.6°F (10.9°C)	-0.8°F (-0.5°C)	13th Coolest	Coolest since: 1980	1979
	50.8°F (10.4°C)	51.6°F (10.9°C)	-0.8°F (-0.5°C)	113th Warmest	Warmest since: 1977	2018
	Ties: 1907, 1920, 1960, 1963, 1970, 1971, 2015
Oct 1977–Sep 1981 48-Month	50.4°F (10.2°C)	51.6°F (10.9°C)	-1.2°F (-0.7°C)	8th Coolest	Coolest since: 1980	1905
Oct 1977–Sep 1981 48-Month	50.4°F (10.2°C)	51.6°F (10.9°C)	-1.2°F (-0.7°C)	117th Warmest	Warmest since: 1978	2019
Oct 1976–Sep 1981 60-Month	50.4°F (10.2°C)	51.6°F (10.9°C)	-1.2°F (-0.7°C)	4th Coolest	Coolest since: 1908	1906
	50.4°F (10.2°C)	51.6°F (10.9°C)	-1.2°F (-0.7°C)	120th Warmest	Warmest since: 1980	2020
	Ties: 1907, 1908

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 23, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings