Divisional 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, Climate Division 7. East Southeast

Average Temperature Rankings, August 1999

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1999 1-Month	72.8°F (22.7°C)	74.2°F (23.4°C)	-1.4°F (-0.7°C)	33rd Coolest	Coolest since: 1997	1915
	72.8°F (22.7°C)	74.2°F (23.4°C)	-1.4°F (-0.7°C)	96th Warmest	Warmest since: 1998	1947
	Ties: 1903, 1974, 2020
Jul–Aug 1999 2-Month	76.0°F (24.4°C)	75.3°F (24.1°C)	0.7°F (0.3°C)	90th Coolest	Coolest since: 1998	1915, 1967
	76.0°F (24.4°C)	75.3°F (24.1°C)	0.7°F (0.3°C)	39th Warmest	Warmest since: 1995	1936
	Ties: 1899, 1933, 1940, 1944
Jun–Aug 1999 3-Month	75.0°F (23.9°C)	74.3°F (23.5°C)	0.7°F (0.4°C)	84th Coolest	Coolest since: 1998	1927
	75.0°F (23.9°C)	74.3°F (23.5°C)	0.7°F (0.4°C)	45th Warmest	Warmest since: 1995	1936
	Ties: 1955
May–Aug 1999 4-Month	72.4°F (22.4°C)	71.5°F (21.9°C)	0.9°F (0.5°C)	85th Coolest	Coolest since: 1997	1915
	72.4°F (22.4°C)	71.5°F (21.9°C)	0.9°F (0.5°C)	44th Warmest	Warmest since: 1998	1936
	Ties: 1916, 1922, 1986
Apr–Aug 1999 5-Month	69.0°F (20.6°C)	67.8°F (19.9°C)	1.2°F (0.7°C)	97th Coolest	Coolest since: 1997	1907
	69.0°F (20.6°C)	67.8°F (19.9°C)	1.2°F (0.7°C)	32nd Warmest	Warmest since: 1998	2010
	Ties: 1943, 1949, 2016
Mar–Aug 1999 6-Month	64.1°F (17.8°C)	63.4°F (17.4°C)	0.7°F (0.4°C)	81st Coolest	Coolest since: 1997	1960
	64.1°F (17.8°C)	63.4°F (17.4°C)	0.7°F (0.4°C)	48th Warmest	Warmest since: 1998	2012
	Ties: 2000, 2004
Feb–Aug 1999 7-Month	60.5°F (15.8°C)	58.9°F (14.9°C)	1.6°F (0.9°C)	111th Coolest	Coolest since: 1997	1904
	60.5°F (15.8°C)	58.9°F (14.9°C)	1.6°F (0.9°C)	18th Warmest	Warmest since: 1998	2012
	Ties: 1946, 1955
Jan–Aug 1999 8-Month	56.5°F (13.6°C)	55.0°F (12.8°C)	1.5°F (0.8°C)	101st Coolest	Coolest since: 1997	1978
	56.5°F (13.6°C)	55.0°F (12.8°C)	1.5°F (0.8°C)	28th Warmest	Warmest since: 1998	2012
	Ties: 1934
Dec 1998–Aug 1999 9-Month	54.3°F (12.4°C)	52.4°F (11.3°C)	1.9°F (1.1°C)	114th Coolest	Coolest since: 1997	1904
	54.3°F (12.4°C)	52.4°F (11.3°C)	1.9°F (1.1°C)	14th Warmest	Warmest since: 1998	2012
	Ties: 1919, 1933, 1934, 1949, 2005
Nov 1998–Aug 1999 10-Month	53.5°F (11.9°C)	51.4°F (10.8°C)	2.1°F (1.1°C)	112th Coolest	Coolest since: 1997	1904
Nov 1998–Aug 1999 10-Month	53.5°F (11.9°C)	51.4°F (10.8°C)	2.1°F (1.1°C)	16th Warmest	Warmest since: 1998	2012
Oct 1998–Aug 1999 11-Month	53.9°F (12.2°C)	51.7°F (10.9°C)	2.2°F (1.3°C)	117th Coolest	Coolest since: 1998	1904
	53.9°F (12.2°C)	51.7°F (10.9°C)	2.2°F (1.3°C)	11th Warmest	Warmest since: 1998	2012
	Ties: 1995, 1998, 2005
Sep 1998–Aug 1999 12-Month	55.4°F (13.0°C)	53.1°F (11.7°C)	2.3°F (1.3°C)	119th Coolest	Coolest since: 1998	1904
	55.4°F (13.0°C)	53.1°F (11.7°C)	2.3°F (1.3°C)	9th Warmest	Warmest since: 1991	2012
	Ties: 2006
Mar 1998–Aug 1999 18-Month	58.5°F (14.7°C)	56.5°F (13.6°C)	2.0°F (1.1°C)	121st Coolest	Coolest since: 1998	1904
	58.5°F (14.7°C)	56.5°F (13.6°C)	2.0°F (1.1°C)	7th Warmest	Warmest since: 1954	2012
	Ties: 2006, 2011
Sep 1997–Aug 1999 24-Month	55.2°F (12.9°C)	53.0°F (11.7°C)	2.2°F (1.2°C)	121st Coolest	Coolest since: 1998	1979
	55.2°F (12.9°C)	53.0°F (11.7°C)	2.2°F (1.2°C)	6th Warmest	Warmest since: 1933	2017
	Ties: 1933, 2000, 2013
Sep 1996–Aug 1999 36-Month	54.1°F (12.3°C)	53.0°F (11.7°C)	1.1°F (0.6°C)	103rd Coolest	Coolest since: 1998	1979
	54.1°F (12.3°C)	53.0°F (11.7°C)	1.1°F (0.6°C)	23rd Warmest	Warmest since: 1993	2018
	Ties: 1922, 1935, 1943, 2020
Sep 1995–Aug 1999 48-Month	53.5°F (11.9°C)	53.0°F (11.7°C)	0.5°F (0.2°C)	77th Coolest	Coolest since: 1998	1980
	53.5°F (11.9°C)	53.0°F (11.7°C)	0.5°F (0.2°C)	48th Warmest	Warmest since: 1994	2019
	Ties: 1939, 1945, 1950, 1974, 1976, 1987
Sep 1994–Aug 1999 60-Month	53.8°F (12.1°C)	53.1°F (11.7°C)	0.7°F (0.4°C)	91st Coolest	Coolest since: 1998	1906, 1981, 1982
	53.8°F (12.1°C)	53.1°F (11.7°C)	0.7°F (0.4°C)	33rd Warmest	Warmest since: 1995	2020
	Ties: 1932, 1942, 1943, 1989, 1990, 1993, 2000

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on February 7, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings