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, July 1998

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
July 1998 1-Month	78.1°F (25.6°C)	77.9°F (25.5°C)	0.2°F (0.1°C)	75th Coolest	Coolest since: 1997	2014
	78.1°F (25.6°C)	77.9°F (25.5°C)	0.2°F (0.1°C)	54th Warmest	Warmest since: 1993	2012
	Ties: 1902, 1907, 1929, 1957, 1973, 2001
Jun–Jul 1998 2-Month	76.7°F (24.8°C)	75.9°F (24.4°C)	0.8°F (0.4°C)	86th Coolest	Coolest since: 1997	1904, 1927
	76.7°F (24.8°C)	75.9°F (24.4°C)	0.8°F (0.4°C)	43rd Warmest	Warmest since: 1993	1934
	Ties: 2006
May–Jul 1998 3-Month	74.5°F (23.6°C)	72.3°F (22.4°C)	2.2°F (1.2°C)	110th Coolest	Coolest since: 1997	1924
	74.5°F (23.6°C)	72.3°F (22.4°C)	2.2°F (1.2°C)	19th Warmest	Warmest since: 1991	1934
	Ties: 1941, 1962, 2022
Apr–Jul 1998 4-Month	69.7°F (20.9°C)	68.1°F (20.1°C)	1.6°F (0.8°C)	102nd Coolest	Coolest since: 1997	1907
	69.7°F (20.9°C)	68.1°F (20.1°C)	1.6°F (0.8°C)	27th Warmest	Warmest since: 1991	2012
	Ties: 1953, 1955, 1965
Mar–Jul 1998 5-Month	64.7°F (18.2°C)	63.4°F (17.4°C)	1.3°F (0.8°C)	103rd Coolest	Coolest since: 1997	1960
	64.7°F (18.2°C)	63.4°F (17.4°C)	1.3°F (0.8°C)	26th Warmest	Warmest since: 1991	2012
	Ties: 1922, 1933, 1952
Feb–Jul 1998 6-Month	61.1°F (16.2°C)	58.6°F (14.8°C)	2.5°F (1.4°C)	117th Coolest	Coolest since: 1997	1947
	61.1°F (16.2°C)	58.6°F (14.8°C)	2.5°F (1.4°C)	12th Warmest	Warmest since: 1991	2012
	Ties: 1925, 1930, 1953, 2011
Jan–Jul 1998 7-Month	57.6°F (14.2°C)	54.7°F (12.6°C)	2.9°F (1.6°C)	124th Coolest	Coolest since: 1997	1912
Jan–Jul 1998 7-Month	57.6°F (14.2°C)	54.7°F (12.6°C)	2.9°F (1.6°C)	5th Warmest	Warmest since: 1921	2012
Dec 1997–Jul 1998 8-Month	54.9°F (12.7°C)	52.2°F (11.2°C)	2.7°F (1.5°C)	122nd Coolest	Coolest since: 1997	1978
Dec 1997–Jul 1998 8-Month	54.9°F (12.7°C)	52.2°F (11.2°C)	2.7°F (1.5°C)	6th Warmest	Warmest since: 1932	2012
Nov 1997–Jul 1998 9-Month	53.5°F (11.9°C)	51.3°F (10.7°C)	2.2°F (1.2°C)	115th Coolest	Coolest since: 1997	1904, 1912
	53.5°F (11.9°C)	51.3°F (10.7°C)	2.2°F (1.2°C)	13th Warmest	Warmest since: 1991	2012
	Ties: 2005
Oct 1997–Jul 1998 10-Month	53.9°F (12.2°C)	52.0°F (11.1°C)	1.9°F (1.1°C)	114th Coolest	Coolest since: 1997	1904, 1912
Oct 1997–Jul 1998 10-Month	53.9°F (12.2°C)	52.0°F (11.1°C)	1.9°F (1.1°C)	14th Warmest	Warmest since: 1991	2012
Sep 1997–Jul 1998 11-Month	55.2°F (12.9°C)	53.5°F (11.9°C)	1.7°F (1.0°C)	112th Coolest	Coolest since: 1997	1904
	55.2°F (12.9°C)	53.5°F (11.9°C)	1.7°F (1.0°C)	16th Warmest	Warmest since: 1991	2012
	Ties: 1939
Aug 1997–Jul 1998 12-Month	56.8°F (13.8°C)	55.4°F (13.0°C)	1.4°F (0.8°C)	109th Coolest	Coolest since: 1997	1904
	56.8°F (13.8°C)	55.4°F (13.0°C)	1.4°F (0.8°C)	19th Warmest	Warmest since: 1991	2012
	Ties: 2005
Feb 1997–Jul 1998 18-Month	57.2°F (14.0°C)	56.5°F (13.6°C)	0.7°F (0.4°C)	89th Coolest	Coolest since: 1997	1918, 1979
	57.2°F (14.0°C)	56.5°F (13.6°C)	0.7°F (0.4°C)	39th Warmest	Warmest since: 1992	2012
	Ties: 1946, 2010, 2021
Aug 1996–Jul 1998 24-Month	55.6°F (13.1°C)	55.4°F (13.0°C)	0.2°F (0.1°C)	73rd Coolest	Coolest since: 1997	1979
	55.6°F (13.1°C)	55.4°F (13.0°C)	0.2°F (0.1°C)	54th Warmest	Warmest since: 1992	2017
	Ties: 1909, 1944, 1950, 1965, 1975
Aug 1995–Jul 1998 36-Month	55.2°F (12.9°C)	55.4°F (13.0°C)	-0.2°F (-0.1°C)	43rd Coolest	Coolest since: 1997	1979
	55.2°F (12.9°C)	55.4°F (13.0°C)	-0.2°F (-0.1°C)	83rd Warmest	Warmest since: 1994	2018
	Ties: 1958, 1959, 1964, 1965, 1967, 1983, 1994
Aug 1994–Jul 1998 48-Month	55.4°F (13.0°C)	55.3°F (12.9°C)	0.1°F (0.1°C)	55th Coolest	Coolest since: 1997	1980
	55.4°F (13.0°C)	55.3°F (12.9°C)	0.1°F (0.1°C)	70th Warmest	Warmest since: 1995	2019
	Ties: 1910, 1953, 1967, 1995
Aug 1993–Jul 1998 60-Month	55.3°F (12.9°C)	55.3°F (12.9°C)	0.0°F (0.0°C)	51st Coolest	Coolest since: 1997	1906
	55.3°F (12.9°C)	55.3°F (12.9°C)	0.0°F (0.0°C)	73rd Warmest	Warmest since: 1995	2020
	Ties: 1914, 1917, 1931

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2023, retrieved on March 21, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings