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, August 1991

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1991 1-Month	74.7°F (23.7°C)	73.4°F (23.0°C)	1.3°F (0.7°C)	97th Coolest	Coolest since: 1990	1915
	74.7°F (23.7°C)	73.4°F (23.0°C)	1.3°F (0.7°C)	32nd Warmest	Warmest since: 1988	1947
	Ties: 1926, 1935, 1984, 2006, 2018
Jul–Aug 1991 2-Month	75.5°F (24.2°C)	74.5°F (23.6°C)	1.0°F (0.6°C)	94th Coolest	Coolest since: 1990	1915
	75.5°F (24.2°C)	74.5°F (23.6°C)	1.0°F (0.6°C)	35th Warmest	Warmest since: 1988	1936
	Ties: 1918, 1953
Jun–Aug 1991 3-Month	75.4°F (24.1°C)	73.5°F (23.1°C)	1.9°F (1.0°C)	107th Coolest	Coolest since: 1990	1915
	75.4°F (24.1°C)	73.5°F (23.1°C)	1.9°F (1.0°C)	22nd Warmest	Warmest since: 1988	1936
	Ties: 1987, 2016
May–Aug 1991 4-Month	73.7°F (23.2°C)	70.7°F (21.5°C)	3.0°F (1.7°C)	124th Coolest	Coolest since: 1990	1915
May–Aug 1991 4-Month	73.7°F (23.2°C)	70.7°F (21.5°C)	3.0°F (1.7°C)	5th Warmest	Warmest since: 1936	1934, 1936
Apr–Aug 1991 5-Month	70.1°F (21.2°C)	66.8°F (19.3°C)	3.3°F (1.9°C)	126th Coolest	Coolest since: 1990	1907
	70.1°F (21.2°C)	66.8°F (19.3°C)	3.3°F (1.9°C)	3rd Warmest	Warmest since: 1934	1934
	Ties: 2012
Mar–Aug 1991 6-Month	65.8°F (18.8°C)	62.3°F (16.8°C)	3.5°F (2.0°C)	126th Coolest	Coolest since: 1990	1904, 1950, 1960
	65.8°F (18.8°C)	62.3°F (16.8°C)	3.5°F (2.0°C)	3rd Warmest	Warmest since: 1921	2012
	Ties: 1921
Feb–Aug 1991 7-Month	61.3°F (16.3°C)	57.6°F (14.2°C)	3.7°F (2.1°C)	126th Coolest	Coolest since: 1990	1904
Feb–Aug 1991 7-Month	61.3°F (16.3°C)	57.6°F (14.2°C)	3.7°F (2.1°C)	3rd Warmest	Warmest since: 1921	2012
Jan–Aug 1991 8-Month	56.5°F (13.6°C)	53.5°F (11.9°C)	3.0°F (1.7°C)	122nd Coolest	Coolest since: 1990	1904, 1912
Jan–Aug 1991 8-Month	56.5°F (13.6°C)	53.5°F (11.9°C)	3.0°F (1.7°C)	7th Warmest	Warmest since: 1987	2012
Dec 1990–Aug 1991 9-Month	53.6°F (12.0°C)	50.9°F (10.5°C)	2.7°F (1.5°C)	121st Coolest	Coolest since: 1990	1904
Dec 1990–Aug 1991 9-Month	53.6°F (12.0°C)	50.9°F (10.5°C)	2.7°F (1.5°C)	7th Warmest	Warmest since: 1987	2012
Nov 1990–Aug 1991 10-Month	52.9°F (11.6°C)	49.8°F (9.9°C)	3.1°F (1.7°C)	121st Coolest	Coolest since: 1990	1904
Nov 1990–Aug 1991 10-Month	52.9°F (11.6°C)	49.8°F (9.9°C)	3.1°F (1.7°C)	7th Warmest	Warmest since: 1932	2012
Oct 1990–Aug 1991 11-Month	52.9°F (11.6°C)	50.3°F (10.2°C)	2.6°F (1.4°C)	121st Coolest	Coolest since: 1990	1904
Oct 1990–Aug 1991 11-Month	52.9°F (11.6°C)	50.3°F (10.2°C)	2.6°F (1.4°C)	7th Warmest	Warmest since: 1932	2012
Sep 1990–Aug 1991 12-Month	54.2°F (12.3°C)	51.7°F (10.9°C)	2.5°F (1.4°C)	122nd Coolest	Coolest since: 1990	1904
	54.2°F (12.3°C)	51.7°F (10.9°C)	2.5°F (1.4°C)	6th Warmest	Warmest since: 1932	2012
	Ties: 1999, 2006
Mar 1990–Aug 1991 18-Month	56.8°F (13.8°C)	55.2°F (12.9°C)	1.6°F (0.9°C)	110th Coolest	Coolest since: 1990	1904
	56.8°F (13.8°C)	55.2°F (12.9°C)	1.6°F (0.9°C)	18th Warmest	Warmest since: 1988	2012
	Ties: 1939, 1988
Sep 1989–Aug 1991 24-Month	53.0°F (11.7°C)	51.6°F (10.9°C)	1.4°F (0.8°C)	108th Coolest	Coolest since: 1990	1905
	53.0°F (11.7°C)	51.6°F (10.9°C)	1.4°F (0.8°C)	19th Warmest	Warmest since: 1988	2017
	Ties: 2016, 2021
Sep 1988–Aug 1991 36-Month	52.5°F (11.4°C)	51.6°F (10.9°C)	0.9°F (0.5°C)	95th Coolest	Coolest since: 1990	1979
	52.5°F (11.4°C)	51.6°F (10.9°C)	0.9°F (0.5°C)	31st Warmest	Warmest since: 1989	2018
	Ties: 1921, 1943, 1957, 1993, 2014
Sep 1987–Aug 1991 48-Month	52.5°F (11.4°C)	51.6°F (10.9°C)	0.9°F (0.5°C)	98th Coolest	Coolest since: 1990	1905
	52.5°F (11.4°C)	51.6°F (10.9°C)	0.9°F (0.5°C)	27th Warmest	Warmest since: 1990	2019
	Ties: 1924, 1942, 1989, 1990, 2014
Sep 1986–Aug 1991 60-Month	52.8°F (11.6°C)	51.6°F (10.9°C)	1.2°F (0.7°C)	109th Coolest	Coolest since: 1990	1906
	52.8°F (11.6°C)	51.6°F (10.9°C)	1.2°F (0.7°C)	15th Warmest	Warmest since: 1957	2020
	Ties: 1936, 2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on January 28, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings