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 8. Southwest

Average Temperature Rankings, June 1999

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
June 1999 1-Month	74.4°F (23.6°C)	73.9°F (23.3°C)	0.5°F (0.3°C)	70th Coolest	Coolest since: 1997	1903
	74.4°F (23.6°C)	73.9°F (23.3°C)	0.5°F (0.3°C)	59th Warmest	Warmest since: 1998	1952
	Ties: 1939, 1957, 1973, 1977
May–Jun 1999 2-Month	70.0°F (21.1°C)	69.4°F (20.8°C)	0.6°F (0.3°C)	76th Coolest	Coolest since: 1997	1907
	70.0°F (21.1°C)	69.4°F (20.8°C)	0.6°F (0.3°C)	53rd Warmest	Warmest since: 1998	2018
	Ties: 1937, 1957
Apr–Jun 1999 3-Month	66.3°F (19.1°C)	64.8°F (18.2°C)	1.5°F (0.9°C)	96th Coolest	Coolest since: 1997	1907
	66.3°F (19.1°C)	64.8°F (18.2°C)	1.5°F (0.9°C)	33rd Warmest	Warmest since: 1998	2010
	Ties: 2014
Mar–Jun 1999 4-Month	60.2°F (15.7°C)	59.8°F (15.4°C)	0.4°F (0.3°C)	72nd Coolest	Coolest since: 1997	1960
	60.2°F (15.7°C)	59.8°F (15.4°C)	0.4°F (0.3°C)	57th Warmest	Warmest since: 1998	2012
	Ties: 1910, 1929, 1945, 1957, 1974
Feb–Jun 1999 5-Month	56.6°F (13.7°C)	54.7°F (12.6°C)	1.9°F (1.1°C)	104th Coolest	Coolest since: 1997	1912, 1960, 1978
	56.6°F (13.7°C)	54.7°F (12.6°C)	1.9°F (1.1°C)	25th Warmest	Warmest since: 1998	2012
	Ties: 1922
Jan–Jun 1999 6-Month	52.6°F (11.4°C)	50.7°F (10.4°C)	1.9°F (1.0°C)	105th Coolest	Coolest since: 1997	1912, 1978
	52.6°F (11.4°C)	50.7°F (10.4°C)	1.9°F (1.0°C)	24th Warmest	Warmest since: 1998	2012
	Ties: 1992
Dec 1998–Jun 1999 7-Month	50.5°F (10.3°C)	48.4°F (9.1°C)	2.1°F (1.2°C)	107th Coolest	Coolest since: 1997	1978
Dec 1998–Jun 1999 7-Month	50.5°F (10.3°C)	48.4°F (9.1°C)	2.1°F (1.2°C)	21st Warmest	Warmest since: 1998	2012
Nov 1998–Jun 1999 8-Month	50.3°F (10.2°C)	48.0°F (8.9°C)	2.3°F (1.3°C)	114th Coolest	Coolest since: 1997	1912
Nov 1998–Jun 1999 8-Month	50.3°F (10.2°C)	48.0°F (8.9°C)	2.3°F (1.3°C)	14th Warmest	Warmest since: 1998	2012
Oct 1998–Jun 1999 9-Month	51.4°F (10.8°C)	49.1°F (9.5°C)	2.3°F (1.3°C)	118th Coolest	Coolest since: 1998	1912, 1978
	51.4°F (10.8°C)	49.1°F (9.5°C)	2.3°F (1.3°C)	10th Warmest	Warmest since: 1991	2012
	Ties: 2002
Sep 1998–Jun 1999 10-Month	53.6°F (12.0°C)	51.0°F (10.6°C)	2.6°F (1.4°C)	120th Coolest	Coolest since: 1998	1978
	53.6°F (12.0°C)	51.0°F (10.6°C)	2.6°F (1.4°C)	8th Warmest	Warmest since: 1991	2012
	Ties: 1991
Aug 1998–Jun 1999 11-Month	55.7°F (13.2°C)	53.3°F (11.8°C)	2.4°F (1.4°C)	122nd Coolest	Coolest since: 1998	1904, 1978
	55.7°F (13.2°C)	53.3°F (11.8°C)	2.4°F (1.4°C)	6th Warmest	Warmest since: 1932	2012
	Ties: 1921, 2000
Jul 1998–Jun 1999 12-Month	57.6°F (14.2°C)	55.4°F (13.0°C)	2.2°F (1.2°C)	121st Coolest	Coolest since: 1998	1904, 1912, 1918, 1978
Jul 1998–Jun 1999 12-Month	57.6°F (14.2°C)	55.4°F (13.0°C)	2.2°F (1.2°C)	7th Warmest	Warmest since: 1932	2012
Jan 1998–Jun 1999 18-Month	56.5°F (13.6°C)	53.9°F (12.2°C)	2.6°F (1.4°C)	124th Coolest	Coolest since: 1998	1979
	56.5°F (13.6°C)	53.9°F (12.2°C)	2.6°F (1.4°C)	4th Warmest	Warmest since: 1932	2017
	Ties: 2013
Jul 1997–Jun 1999 24-Month	57.2°F (14.0°C)	55.4°F (13.0°C)	1.8°F (1.0°C)	118th Coolest	Coolest since: 1998	1978, 1979
	57.2°F (14.0°C)	55.4°F (13.0°C)	1.8°F (1.0°C)	9th Warmest	Warmest since: 1955	2017
	Ties: 1955, 2006
Jul 1996–Jun 1999 36-Month	56.2°F (13.4°C)	55.4°F (13.0°C)	0.8°F (0.4°C)	97th Coolest	Coolest since: 1998	1979
	56.2°F (13.4°C)	55.4°F (13.0°C)	0.8°F (0.4°C)	29th Warmest	Warmest since: 1992	2018
	Ties: 1922, 1943, 1988, 2005
Jul 1995–Jun 1999 48-Month	55.8°F (13.2°C)	55.3°F (12.9°C)	0.5°F (0.3°C)	80th Coolest	Coolest since: 1998	1980
	55.8°F (13.2°C)	55.3°F (12.9°C)	0.5°F (0.3°C)	45th Warmest	Warmest since: 1993	2019
	Ties: 1925, 1938, 1945, 1958, 1987, 1990, 2016
Jul 1994–Jun 1999 60-Month	55.8°F (13.2°C)	55.3°F (12.9°C)	0.5°F (0.3°C)	77th Coolest	Coolest since: 1998	1980
	55.8°F (13.2°C)	55.3°F (12.9°C)	0.5°F (0.3°C)	47th Warmest	Warmest since: 1995	2020
	Ties: 1924, 1976, 1988, 1993, 1995

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 29, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings