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, May 1999

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1999 1-Month	62.3°F (16.8°C)	58.9°F (14.9°C)	3.4°F (1.9°C)	103rd Coolest	Coolest since: 1997	1907
May 1999 1-Month	62.3°F (16.8°C)	58.9°F (14.9°C)	3.4°F (1.9°C)	26th Warmest	Warmest since: 1998	1977
Apr–May 1999 2-Month	56.4°F (13.6°C)	53.3°F (11.8°C)	3.1°F (1.8°C)	112th Coolest	Coolest since: 1997	1907
	56.4°F (13.6°C)	53.3°F (11.8°C)	3.1°F (1.8°C)	17th Warmest	Warmest since: 1998	1896, 1977
	Ties: 2006
Mar–May 1999 3-Month	49.4°F (9.7°C)	47.6°F (8.7°C)	1.8°F (1.0°C)	103rd Coolest	Coolest since: 1997	1926
	49.4°F (9.7°C)	47.6°F (8.7°C)	1.8°F (1.0°C)	26th Warmest	Warmest since: 1998	2012
	Ties: 2017
Feb–May 1999 4-Month	45.5°F (7.5°C)	41.9°F (5.5°C)	3.6°F (2.0°C)	118th Coolest	Coolest since: 1997	1904, 1947
Feb–May 1999 4-Month	45.5°F (7.5°C)	41.9°F (5.5°C)	3.6°F (2.0°C)	11th Warmest	Warmest since: 1998	2012
Jan–May 1999 5-Month	40.4°F (4.7°C)	37.7°F (3.2°C)	2.7°F (1.5°C)	113th Coolest	Coolest since: 1997	1912
	40.4°F (4.7°C)	37.7°F (3.2°C)	2.7°F (1.5°C)	16th Warmest	Warmest since: 1998	2012
	Ties: 2020
Dec 1998–May 1999 6-Month	39.3°F (4.1°C)	35.8°F (2.1°C)	3.5°F (2.0°C)	120th Coolest	Coolest since: 1997	1904
Dec 1998–May 1999 6-Month	39.3°F (4.1°C)	35.8°F (2.1°C)	3.5°F (2.0°C)	8th Warmest	Warmest since: 1998	2012
Nov 1998–May 1999 7-Month	39.9°F (4.4°C)	36.1°F (2.3°C)	3.8°F (2.1°C)	120th Coolest	Coolest since: 1997	1904
	39.9°F (4.4°C)	36.1°F (2.3°C)	3.8°F (2.1°C)	8th Warmest	Warmest since: 1998	2012
	Ties: 1991
Oct 1998–May 1999 8-Month	41.7°F (5.4°C)	38.1°F (3.4°C)	3.6°F (2.0°C)	120th Coolest	Coolest since: 1997	1904
Oct 1998–May 1999 8-Month	41.7°F (5.4°C)	38.1°F (3.4°C)	3.6°F (2.0°C)	8th Warmest	Warmest since: 1998	2012
Sep 1998–May 1999 9-Month	44.6°F (7.0°C)	41.0°F (5.0°C)	3.6°F (2.0°C)	122nd Coolest	Coolest since: 1998	1904
	44.6°F (7.0°C)	41.0°F (5.0°C)	3.6°F (2.0°C)	6th Warmest	Warmest since: 1998	2012
	Ties: 1998
Aug 1998–May 1999 10-Month	47.5°F (8.6°C)	44.0°F (6.7°C)	3.5°F (1.9°C)	123rd Coolest	Coolest since: 1998	1904
Aug 1998–May 1999 10-Month	47.5°F (8.6°C)	44.0°F (6.7°C)	3.5°F (1.9°C)	5th Warmest	Warmest since: 1921	2012
Jul 1998–May 1999 11-Month	49.8°F (9.9°C)	46.6°F (8.1°C)	3.2°F (1.8°C)	122nd Coolest	Coolest since: 1998	1904
	49.8°F (9.9°C)	46.6°F (8.1°C)	3.2°F (1.8°C)	6th Warmest	Warmest since: 1932	2012
	Ties: 2006
Jun 1998–May 1999 12-Month	51.4°F (10.8°C)	48.5°F (9.2°C)	2.9°F (1.6°C)	121st Coolest	Coolest since: 1998	1904
	51.4°F (10.8°C)	48.5°F (9.2°C)	2.9°F (1.6°C)	7th Warmest	Warmest since: 1932	2012
	Ties: 2000
Dec 1997–May 1999 18-Month	48.1°F (8.9°C)	44.2°F (6.8°C)	3.9°F (2.1°C)	125th Coolest	Coolest since: 1998	1905, 1918
Dec 1997–May 1999 18-Month	48.1°F (8.9°C)	44.2°F (6.8°C)	3.9°F (2.1°C)	2nd Warmest	Warmest to Date	2017
Jun 1997–May 1999 24-Month	51.2°F (10.7°C)	48.5°F (9.2°C)	2.7°F (1.5°C)	122nd Coolest	Coolest since: 1998	1905
Jun 1997–May 1999 24-Month	51.2°F (10.7°C)	48.5°F (9.2°C)	2.7°F (1.5°C)	5th Warmest	Warmest to Date	2017
Jun 1996–May 1999 36-Month	49.9°F (9.9°C)	48.5°F (9.2°C)	1.4°F (0.7°C)	107th Coolest	Coolest since: 1998	1918
	49.9°F (9.9°C)	48.5°F (9.2°C)	1.4°F (0.7°C)	19th Warmest	Warmest since: 1992	2000
	Ties: 1989
Jun 1995–May 1999 48-Month	49.4°F (9.7°C)	48.4°F (9.1°C)	1.0°F (0.6°C)	95th Coolest	Coolest since: 1998	1907
	49.4°F (9.7°C)	48.4°F (9.1°C)	1.0°F (0.6°C)	30th Warmest	Warmest since: 1992	2001
	Ties: 1933, 2017
Jun 1994–May 1999 60-Month	49.4°F (9.7°C)	48.4°F (9.1°C)	1.0°F (0.6°C)	98th Coolest	Coolest since: 1998	1908
	49.4°F (9.7°C)	48.4°F (9.1°C)	1.0°F (0.6°C)	26th Warmest	Warmest since: 1993	2002
	Ties: 1934, 1990, 1993

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on February 3, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings