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, October 1991

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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
October 1991 1-Month	55.6°F (13.1°C)	54.6°F (12.6°C)	1.0°F (0.5°C)	84th Coolest	Coolest since: 1990	1925
	55.6°F (13.1°C)	54.6°F (12.6°C)	1.0°F (0.5°C)	45th Warmest	Warmest since: 1989	1963
	Ties: 1915, 1958, 1961
Sep–Oct 1991 2-Month	61.0°F (16.1°C)	60.5°F (15.8°C)	0.5°F (0.3°C)	76th Coolest	Coolest since: 1990	1917
Sep–Oct 1991 2-Month	61.0°F (16.1°C)	60.5°F (15.8°C)	0.5°F (0.3°C)	53rd Warmest	Warmest since: 1986	1897
Aug–Oct 1991 3-Month	65.6°F (18.7°C)	64.8°F (18.2°C)	0.8°F (0.5°C)	89th Coolest	Coolest since: 1990	1917
	65.6°F (18.7°C)	64.8°F (18.2°C)	0.8°F (0.5°C)	40th Warmest	Warmest since: 1984	1947
	Ties: 1984
Jul–Oct 1991 4-Month	68.3°F (20.2°C)	67.5°F (19.7°C)	0.8°F (0.5°C)	87th Coolest	Coolest since: 1990	1917
	68.3°F (20.2°C)	67.5°F (19.7°C)	0.8°F (0.5°C)	42nd Warmest	Warmest since: 1983	1936
	Ties: 1920
Jun–Oct 1991 5-Month	69.6°F (20.9°C)	68.2°F (20.1°C)	1.4°F (0.8°C)	100th Coolest	Coolest since: 1990	1917
Jun–Oct 1991 5-Month	69.6°F (20.9°C)	68.2°F (20.1°C)	1.4°F (0.8°C)	29th Warmest	Warmest since: 1983	1936
May–Oct 1991 6-Month	69.5°F (20.8°C)	67.2°F (19.6°C)	2.3°F (1.2°C)	122nd Coolest	Coolest since: 1990	1917
	69.5°F (20.8°C)	67.2°F (19.6°C)	2.3°F (1.2°C)	7th Warmest	Warmest since: 1941	1936
	Ties: 1921, 1941, 1998
Apr–Oct 1991 7-Month	67.5°F (19.7°C)	65.0°F (18.3°C)	2.5°F (1.4°C)	126th Coolest	Coolest since: 1990	1917
	67.5°F (19.7°C)	65.0°F (18.3°C)	2.5°F (1.4°C)	3rd Warmest	Warmest since: 1941	2010
	Ties: 1936, 1941
Mar–Oct 1991 8-Month	64.6°F (18.1°C)	61.8°F (16.6°C)	2.8°F (1.5°C)	123rd Coolest	Coolest since: 1990	1917
Mar–Oct 1991 8-Month	64.6°F (18.1°C)	61.8°F (16.6°C)	2.8°F (1.5°C)	6th Warmest	Warmest since: 1921	2012
Feb–Oct 1991 9-Month	61.2°F (16.2°C)	58.2°F (14.6°C)	3.0°F (1.6°C)	125th Coolest	Coolest since: 1990	1917
Feb–Oct 1991 9-Month	61.2°F (16.2°C)	58.2°F (14.6°C)	3.0°F (1.6°C)	4th Warmest	Warmest since: 1921	2012
Jan–Oct 1991 10-Month	57.4°F (14.1°C)	54.9°F (12.7°C)	2.5°F (1.4°C)	122nd Coolest	Coolest since: 1990	1904
	57.4°F (14.1°C)	54.9°F (12.7°C)	2.5°F (1.4°C)	7th Warmest	Warmest since: 1938	2012
	Ties: 2005
Dec 1990–Oct 1991 11-Month	55.0°F (12.8°C)	52.6°F (11.4°C)	2.4°F (1.4°C)	121st Coolest	Coolest since: 1990	1904
	55.0°F (12.8°C)	52.6°F (11.4°C)	2.4°F (1.4°C)	7th Warmest	Warmest since: 1921	2012
	Ties: 2005
Nov 1990–Oct 1991 12-Month	54.3°F (12.4°C)	51.6°F (10.9°C)	2.7°F (1.5°C)	121st Coolest	Coolest since: 1990	1904
	54.3°F (12.4°C)	51.6°F (10.9°C)	2.7°F (1.5°C)	7th Warmest	Warmest since: 1921	2012
	Ties: 2007
May 1990–Oct 1991 18-Month	58.3°F (14.6°C)	56.8°F (13.8°C)	1.5°F (0.8°C)	112th Coolest	Coolest since: 1990	1904
	58.3°F (14.6°C)	56.8°F (13.8°C)	1.5°F (0.8°C)	16th Warmest	Warmest since: 1955	2012
	Ties: 1914, 1939, 1955
Nov 1989–Oct 1991 24-Month	53.1°F (11.7°C)	51.6°F (10.9°C)	1.5°F (0.8°C)	108th Coolest	Coolest since: 1990	1905
	53.1°F (11.7°C)	51.6°F (10.9°C)	1.5°F (0.8°C)	19th Warmest	Warmest since: 1955	2017
	Ties: 1934, 1992
Nov 1988–Oct 1991 36-Month	52.6°F (11.4°C)	51.6°F (10.9°C)	1.0°F (0.5°C)	98th Coolest	Coolest since: 1990	1904, 1979
	52.6°F (11.4°C)	51.6°F (10.9°C)	1.0°F (0.5°C)	28th Warmest	Warmest since: 1988	2018
	Ties: 1922
Nov 1987–Oct 1991 48-Month	52.6°F (11.4°C)	51.6°F (10.9°C)	1.0°F (0.5°C)	102nd Coolest	Coolest since: 1990	1905
	52.6°F (11.4°C)	51.6°F (10.9°C)	1.0°F (0.5°C)	23rd Warmest	Warmest since: 1957	2019
	Ties: 1932, 1957
Nov 1986–Oct 1991 60-Month	52.8°F (11.6°C)	51.6°F (10.9°C)	1.2°F (0.7°C)	111th Coolest	Coolest since: 1990	1905, 1906
	52.8°F (11.6°C)	51.6°F (10.9°C)	1.2°F (0.7°C)	13th Warmest	Warmest since: 1957	2002, 2020
	Ties: 1956, 2003

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published June 2023, retrieved on June 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings