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 2. Northeast

Average Temperature Rankings, September 1998

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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
September 1998 1-Month	68.1°F (20.1°C)	63.7°F (17.6°C)	4.4°F (2.5°C)	118th Coolest	Coolest since: 1997	1918
	68.1°F (20.1°C)	63.7°F (17.6°C)	4.4°F (2.5°C)	11th Warmest	Warmest since: 1978	1897
	Ties: 2019
Aug–Sep 1998 2-Month	70.7°F (21.5°C)	67.4°F (19.7°C)	3.3°F (1.8°C)	121st Coolest	Coolest since: 1997	1902
	70.7°F (21.5°C)	67.4°F (19.7°C)	3.3°F (1.8°C)	8th Warmest	Warmest since: 1988	1947
	Ties: 1906
Jul–Sep 1998 3-Month	71.5°F (21.9°C)	69.3°F (20.7°C)	2.2°F (1.2°C)	113th Coolest	Coolest since: 1997	1924
	71.5°F (21.9°C)	69.3°F (20.7°C)	2.2°F (1.2°C)	16th Warmest	Warmest since: 1995	1936
	Ties: 1947, 2012
Jun–Sep 1998 4-Month	70.9°F (21.6°C)	69.2°F (20.7°C)	1.7°F (0.9°C)	106th Coolest	Coolest since: 1997	1915
	70.9°F (21.6°C)	69.2°F (20.7°C)	1.7°F (0.9°C)	23rd Warmest	Warmest since: 1995	2005
	Ties: 1895, 1925, 2007
May–Sep 1998 5-Month	69.7°F (20.9°C)	67.1°F (19.5°C)	2.6°F (1.4°C)	121st Coolest	Coolest since: 1997	1924
	69.7°F (20.9°C)	67.1°F (19.5°C)	2.6°F (1.4°C)	8th Warmest	Warmest since: 1991	1921, 1988
	Ties: 1933, 1959, 2005
Apr–Sep 1998 6-Month	66.4°F (19.1°C)	63.9°F (17.7°C)	2.5°F (1.4°C)	119th Coolest	Coolest since: 1997	1907
	66.4°F (19.1°C)	63.9°F (17.7°C)	2.5°F (1.4°C)	10th Warmest	Warmest since: 1991	1921
	Ties: 2021
Mar–Sep 1998 7-Month	62.4°F (16.9°C)	59.9°F (15.5°C)	2.5°F (1.4°C)	119th Coolest	Coolest since: 1997	1924
	62.4°F (16.9°C)	59.9°F (15.5°C)	2.5°F (1.4°C)	10th Warmest	Warmest since: 1991	2012
	Ties: 2007
Feb–Sep 1998 8-Month	59.3°F (15.2°C)	55.5°F (13.1°C)	3.8°F (2.1°C)	126th Coolest	Coolest since: 1997	1904, 1917
Feb–Sep 1998 8-Month	59.3°F (15.2°C)	55.5°F (13.1°C)	3.8°F (2.1°C)	3rd Warmest	Warmest since: 1921	2012
Jan–Sep 1998 9-Month	55.9°F (13.3°C)	51.7°F (10.9°C)	4.2°F (2.4°C)	126th Coolest	Coolest since: 1997	1904, 1912
Jan–Sep 1998 9-Month	55.9°F (13.3°C)	51.7°F (10.9°C)	4.2°F (2.4°C)	3rd Warmest	Warmest since: 1921	2012
Dec 1997–Sep 1998 10-Month	53.3°F (11.8°C)	49.1°F (9.5°C)	4.2°F (2.3°C)	125th Coolest	Coolest since: 1997	1904
Dec 1997–Sep 1998 10-Month	53.3°F (11.8°C)	49.1°F (9.5°C)	4.2°F (2.3°C)	3rd Warmest	Warmest since: 1921	2012
Nov 1997–Sep 1998 11-Month	51.7°F (10.9°C)	48.1°F (8.9°C)	3.6°F (2.0°C)	123rd Coolest	Coolest since: 1997	1904
Nov 1997–Sep 1998 11-Month	51.7°F (10.9°C)	48.1°F (8.9°C)	3.6°F (2.0°C)	5th Warmest	Warmest since: 1921	2012
Oct 1997–Sep 1998 12-Month	51.8°F (11.0°C)	48.5°F (9.2°C)	3.3°F (1.8°C)	124th Coolest	Coolest since: 1997	1904
	51.8°F (11.0°C)	48.5°F (9.2°C)	3.3°F (1.8°C)	4th Warmest	Warmest since: 1921	2012
	Ties: 2002
Apr 1997–Sep 1998 18-Month	55.2°F (12.9°C)	53.6°F (12.0°C)	1.6°F (0.9°C)	110th Coolest	Coolest since: 1997	1904
	55.2°F (12.9°C)	53.6°F (12.0°C)	1.6°F (0.9°C)	18th Warmest	Warmest since: 1991	2012
	Ties: 1942, 1954
Oct 1996–Sep 1998 24-Month	49.5°F (9.7°C)	48.5°F (9.2°C)	1.0°F (0.5°C)	98th Coolest	Coolest since: 1997	1918
	49.5°F (9.7°C)	48.5°F (9.2°C)	1.0°F (0.5°C)	29th Warmest	Warmest since: 1992	2017
	Ties: 1921, 1934
Oct 1995–Sep 1998 36-Month	48.6°F (9.2°C)	48.4°F (9.1°C)	0.2°F (0.1°C)	68th Coolest	Coolest since: 1997	1979
	48.6°F (9.2°C)	48.4°F (9.1°C)	0.2°F (0.1°C)	58th Warmest	Warmest since: 1995	2000
	Ties: 1966, 1986
Oct 1994–Sep 1998 48-Month	49.1°F (9.5°C)	48.4°F (9.1°C)	0.7°F (0.4°C)	84th Coolest	Coolest since: 1997	1905, 1918
	49.1°F (9.5°C)	48.4°F (9.1°C)	0.7°F (0.4°C)	41st Warmest	Warmest since: 1993	2001, 2002, 2019
	Ties: 1941, 1976, 2015
Oct 1993–Sep 1998 60-Month	48.8°F (9.3°C)	48.4°F (9.1°C)	0.4°F (0.2°C)	74th Coolest	Coolest since: 1997	1905, 1906
Oct 1993–Sep 1998 60-Month	48.8°F (9.3°C)	48.4°F (9.1°C)	0.4°F (0.2°C)	50th Warmest	Warmest since: 1995	2002

Citing This Page

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