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 1986

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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
September 1986 1-Month	69.2°F (20.7°C)	66.2°F (19.0°C)	3.0°F (1.7°C)	105th Coolest	Coolest since: 1985	1918
	69.2°F (20.7°C)	66.2°F (19.0°C)	3.0°F (1.7°C)	24th Warmest	Warmest since: 1978	1925, 1933
	Ties: 1971
Aug–Sep 1986 2-Month	69.4°F (20.8°C)	69.8°F (21.0°C)	-0.4°F (-0.2°C)	53rd Coolest	Coolest since: 1985	1967
	69.4°F (20.8°C)	69.8°F (21.0°C)	-0.4°F (-0.2°C)	76th Warmest	Warmest since: 1984	1936
	Ties: 1912
Jul–Sep 1986 3-Month	72.2°F (22.3°C)	71.7°F (22.1°C)	0.5°F (0.2°C)	76th Coolest	Coolest since: 1985	1967
	72.2°F (22.3°C)	71.7°F (22.1°C)	0.5°F (0.2°C)	53rd Warmest	Warmest since: 1983	1936
	Ties: 1895, 1970, 2015
Jun–Sep 1986 4-Month	72.4°F (22.4°C)	71.7°F (22.1°C)	0.7°F (0.3°C)	82nd Coolest	Coolest since: 1985	1915, 1924
	72.4°F (22.4°C)	71.7°F (22.1°C)	0.7°F (0.3°C)	47th Warmest	Warmest since: 1983	1936
	Ties: 1947
May–Sep 1986 5-Month	70.7°F (21.5°C)	69.7°F (20.9°C)	1.0°F (0.6°C)	90th Coolest	Coolest since: 1985	1924
	70.7°F (21.5°C)	69.7°F (20.9°C)	1.0°F (0.6°C)	39th Warmest	Warmest since: 1983	1936
	Ties: 1925, 2011
Apr–Sep 1986 6-Month	68.2°F (20.1°C)	66.7°F (19.3°C)	1.5°F (0.8°C)	105th Coolest	Coolest since: 1985	1907
	68.2°F (20.1°C)	66.7°F (19.3°C)	1.5°F (0.8°C)	24th Warmest	Warmest since: 1977	2010
	Ties: 1911, 1931, 2002
Mar–Sep 1986 7-Month	64.7°F (18.2°C)	62.9°F (17.2°C)	1.8°F (1.0°C)	114th Coolest	Coolest since: 1985	1924
	64.7°F (18.2°C)	62.9°F (17.2°C)	1.8°F (1.0°C)	15th Warmest	Warmest since: 1977	2012
	Ties: 1933, 1934, 1938, 2005
Feb–Sep 1986 8-Month	60.2°F (15.7°C)	58.7°F (14.8°C)	1.5°F (0.9°C)	111th Coolest	Coolest since: 1985	1904
	60.2°F (15.7°C)	58.7°F (14.8°C)	1.5°F (0.9°C)	18th Warmest	Warmest since: 1977	2012
	Ties: 1922, 1931, 1953, 1999, 2002, 2007, 2018
Jan–Sep 1986 9-Month	56.6°F (13.7°C)	54.9°F (12.7°C)	1.7°F (1.0°C)	106th Coolest	Coolest since: 1985	1904, 1912
	56.6°F (13.7°C)	54.9°F (12.7°C)	1.7°F (1.0°C)	23rd Warmest	Warmest since: 1955	2012
	Ties: 1934
Dec 1985–Sep 1986 10-Month	53.0°F (11.7°C)	52.4°F (11.3°C)	0.6°F (0.4°C)	76th Coolest	Coolest since: 1985	1904
	53.0°F (11.7°C)	52.4°F (11.3°C)	0.6°F (0.4°C)	52nd Warmest	Warmest since: 1983	2012
	Ties: 1957, 2013
Nov 1985–Sep 1986 11-Month	52.0°F (11.1°C)	51.4°F (10.8°C)	0.6°F (0.3°C)	86th Coolest	Coolest since: 1985	1904
	52.0°F (11.1°C)	51.4°F (10.8°C)	0.6°F (0.3°C)	42nd Warmest	Warmest since: 1983	2012
	Ties: 1896, 1930, 1946, 2013
Oct 1985–Sep 1986 12-Month	52.3°F (11.3°C)	51.6°F (10.9°C)	0.7°F (0.4°C)	86th Coolest	Coolest since: 1985	1904
	52.3°F (11.3°C)	51.6°F (10.9°C)	0.7°F (0.4°C)	42nd Warmest	Warmest since: 1983	2012
	Ties: 1898, 1913, 1949, 1972, 1990
Apr 1985–Sep 1986 18-Month	57.2°F (14.0°C)	56.7°F (13.7°C)	0.5°F (0.3°C)	81st Coolest	Coolest since: 1985	1904, 1918
	57.2°F (14.0°C)	56.7°F (13.7°C)	0.5°F (0.3°C)	47th Warmest	Warmest since: 1983	2012
	Ties: 1956, 1976, 2004
Oct 1984–Sep 1986 24-Month	52.1°F (11.2°C)	51.6°F (10.9°C)	0.5°F (0.3°C)	87th Coolest	Coolest since: 1985	1979
	52.1°F (11.2°C)	51.6°F (10.9°C)	0.5°F (0.3°C)	40th Warmest	Warmest since: 1976	2017
	Ties: 1943, 1949, 1973, 1976, 2010
Oct 1983–Sep 1986 36-Month	51.5°F (10.8°C)	51.6°F (10.9°C)	-0.1°F (-0.1°C)	50th Coolest	Coolest since: 1984	1979
	51.5°F (10.8°C)	51.6°F (10.9°C)	-0.1°F (-0.1°C)	76th Warmest	Warmest since: 1985	2018
	Ties: 1910, 1925, 1945, 1977
Oct 1982–Sep 1986 48-Month	52.0°F (11.1°C)	51.6°F (10.9°C)	0.4°F (0.2°C)	79th Coolest	Coolest since: 1985	1905
	52.0°F (11.1°C)	51.6°F (10.9°C)	0.4°F (0.2°C)	46th Warmest	Warmest since: 1976	2019
	Ties: 1940, 1949, 1976, 1998, 2011
Oct 1981–Sep 1986 60-Month	51.6°F (10.9°C)	51.6°F (10.9°C)	0.0°F (0.0°C)	55th Coolest	Coolest since: 1985	1906
	51.6°F (10.9°C)	51.6°F (10.9°C)	0.0°F (0.0°C)	69th Warmest	Warmest since: 1977	2020
	Ties: 1977

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 24, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings