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 5. East

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	71.8°F (22.1°C)	70.4°F (21.3°C)	1.4°F (0.8°C)	83rd Coolest	Coolest since: 1998	1903
	71.8°F (22.1°C)	70.4°F (21.3°C)	1.4°F (0.8°C)	46th Warmest	Warmest since: 1995	1933
	Ties: 1901, 1922, 1923, 1967, 2009
May–Jun 1999 2-Month	68.0°F (20.0°C)	65.7°F (18.7°C)	2.3°F (1.3°C)	102nd Coolest	Coolest since: 1997	1907
May–Jun 1999 2-Month	68.0°F (20.0°C)	65.7°F (18.7°C)	2.3°F (1.3°C)	27th Warmest	Warmest since: 1998	2018
Apr–Jun 1999 3-Month	62.9°F (17.2°C)	60.4°F (15.8°C)	2.5°F (1.4°C)	113th Coolest	Coolest since: 1997	1907
	62.9°F (17.2°C)	60.4°F (15.8°C)	2.5°F (1.4°C)	16th Warmest	Warmest since: 1998	1991
	Ties: 1985
Mar–Jun 1999 4-Month	56.4°F (13.6°C)	54.9°F (12.7°C)	1.5°F (0.9°C)	97th Coolest	Coolest since: 1997	1926, 1960
	56.4°F (13.6°C)	54.9°F (12.7°C)	1.5°F (0.9°C)	32nd Warmest	Warmest since: 1998	2012
	Ties: 1911, 1963, 1973, 2001
Feb–Jun 1999 5-Month	52.2°F (11.2°C)	49.4°F (9.7°C)	2.8°F (1.5°C)	116th Coolest	Coolest since: 1997	1904, 1947
	52.2°F (11.2°C)	49.4°F (9.7°C)	2.8°F (1.5°C)	13th Warmest	Warmest since: 1998	2012
	Ties: 1946
Jan–Jun 1999 6-Month	47.3°F (8.5°C)	45.2°F (7.3°C)	2.1°F (1.2°C)	109th Coolest	Coolest since: 1997	1912
	47.3°F (8.5°C)	45.2°F (7.3°C)	2.1°F (1.2°C)	20th Warmest	Warmest since: 1998	2012
	Ties: 1911, 1932, 1952, 1973, 1992
Dec 1998–Jun 1999 7-Month	45.5°F (7.5°C)	42.7°F (5.9°C)	2.8°F (1.6°C)	117th Coolest	Coolest since: 1997	1904
	45.5°F (7.5°C)	42.7°F (5.9°C)	2.8°F (1.6°C)	11th Warmest	Warmest since: 1998	2012
	Ties: 1954, 2020
Nov 1998–Jun 1999 8-Month	45.4°F (7.4°C)	42.3°F (5.7°C)	3.1°F (1.7°C)	118th Coolest	Coolest since: 1997	1904
Nov 1998–Jun 1999 8-Month	45.4°F (7.4°C)	42.3°F (5.7°C)	3.1°F (1.7°C)	10th Warmest	Warmest since: 1998	2012
Oct 1998–Jun 1999 9-Month	46.5°F (8.1°C)	43.5°F (6.4°C)	3.0°F (1.7°C)	118th Coolest	Coolest since: 1997	1904
Oct 1998–Jun 1999 9-Month	46.5°F (8.1°C)	43.5°F (6.4°C)	3.0°F (1.7°C)	10th Warmest	Warmest since: 1998	2012
Sep 1998–Jun 1999 10-Month	49.0°F (9.4°C)	45.8°F (7.7°C)	3.2°F (1.7°C)	122nd Coolest	Coolest since: 1998	1904
	49.0°F (9.4°C)	45.8°F (7.7°C)	3.2°F (1.7°C)	6th Warmest	Warmest since: 1991	2012
	Ties: 1991
Aug 1998–Jun 1999 11-Month	51.2°F (10.7°C)	48.1°F (8.9°C)	3.1°F (1.8°C)	122nd Coolest	Coolest since: 1998	1904
Aug 1998–Jun 1999 11-Month	51.2°F (10.7°C)	48.1°F (8.9°C)	3.1°F (1.8°C)	6th Warmest	Warmest since: 1932	2012, 2017
Jul 1998–Jun 1999 12-Month	53.1°F (11.7°C)	50.3°F (10.2°C)	2.8°F (1.5°C)	122nd Coolest	Coolest since: 1998	1904
Jul 1998–Jun 1999 12-Month	53.1°F (11.7°C)	50.3°F (10.2°C)	2.8°F (1.5°C)	6th Warmest	Warmest since: 1932	2012
Jan 1998–Jun 1999 18-Month	52.0°F (11.1°C)	48.6°F (9.2°C)	3.4°F (1.9°C)	126th Coolest	Coolest since: 1998	1905
Jan 1998–Jun 1999 18-Month	52.0°F (11.1°C)	48.6°F (9.2°C)	3.4°F (1.9°C)	2nd Warmest	Warmest to Date	2017
Jul 1997–Jun 1999 24-Month	52.8°F (11.6°C)	50.3°F (10.2°C)	2.5°F (1.4°C)	121st Coolest	Coolest since: 1998	1905
	52.8°F (11.6°C)	50.3°F (10.2°C)	2.5°F (1.4°C)	6th Warmest	Warmest since: 1932	2017
	Ties: 1932
Jul 1996–Jun 1999 36-Month	51.6°F (10.9°C)	50.3°F (10.2°C)	1.3°F (0.7°C)	104th Coolest	Coolest since: 1998	1905, 1906
	51.6°F (10.9°C)	50.3°F (10.2°C)	1.3°F (0.7°C)	22nd Warmest	Warmest since: 1992	2018
	Ties: 1989, 1991
Jul 1995–Jun 1999 48-Month	51.1°F (10.6°C)	50.3°F (10.2°C)	0.8°F (0.4°C)	90th Coolest	Coolest since: 1998	1905
	51.1°F (10.6°C)	50.3°F (10.2°C)	0.8°F (0.4°C)	35th Warmest	Warmest since: 1993	2019
	Ties: 1923, 1924, 1987, 2010
Jul 1994–Jun 1999 60-Month	51.2°F (10.7°C)	50.3°F (10.2°C)	0.9°F (0.5°C)	91st Coolest	Coolest since: 1998	1906
	51.2°F (10.7°C)	50.3°F (10.2°C)	0.9°F (0.5°C)	33rd Warmest	Warmest since: 1993	2020
	Ties: 1942, 1958, 1987, 1988

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings