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, August 1987

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1987 1-Month	72.8°F (22.7°C)	72.1°F (22.3°C)	0.7°F (0.4°C)	79th Coolest	Coolest since: 1986	1915
	72.8°F (22.7°C)	72.1°F (22.3°C)	0.7°F (0.4°C)	50th Warmest	Warmest since: 1984	1947
	Ties: 1948, 2006
Jul–Aug 1987 2-Month	74.6°F (23.7°C)	73.3°F (22.9°C)	1.3°F (0.8°C)	102nd Coolest	Coolest since: 1986	1915
	74.6°F (23.7°C)	73.3°F (22.9°C)	1.3°F (0.8°C)	27th Warmest	Warmest since: 1983	1936
	Ties: 1937, 1954, 2005, 2016
Jun–Aug 1987 3-Month	74.2°F (23.4°C)	72.3°F (22.4°C)	1.9°F (1.0°C)	105th Coolest	Coolest since: 1986	1915
	74.2°F (23.4°C)	72.3°F (22.4°C)	1.9°F (1.0°C)	24th Warmest	Warmest since: 1983	1936
	Ties: 2016
May–Aug 1987 4-Month	72.5°F (22.5°C)	69.5°F (20.8°C)	3.0°F (1.7°C)	122nd Coolest	Coolest since: 1986	1915
	72.5°F (22.5°C)	69.5°F (20.8°C)	3.0°F (1.7°C)	7th Warmest	Warmest since: 1936	1934
	Ties: 2010
Apr–Aug 1987 5-Month	68.4°F (20.2°C)	65.5°F (18.6°C)	2.9°F (1.6°C)	123rd Coolest	Coolest since: 1986	1907
Apr–Aug 1987 5-Month	68.4°F (20.2°C)	65.5°F (18.6°C)	2.9°F (1.6°C)	6th Warmest	Warmest since: 1934	1991
Mar–Aug 1987 6-Month	64.2°F (17.9°C)	61.0°F (16.1°C)	3.2°F (1.8°C)	124th Coolest	Coolest since: 1986	1904, 1907
	64.2°F (17.9°C)	61.0°F (16.1°C)	3.2°F (1.8°C)	5th Warmest	Warmest since: 1977	2012
	Ties: 1977
Feb–Aug 1987 7-Month	59.8°F (15.4°C)	56.2°F (13.4°C)	3.6°F (2.0°C)	125th Coolest	Coolest since: 1986	1904
Feb–Aug 1987 7-Month	59.8°F (15.4°C)	56.2°F (13.4°C)	3.6°F (2.0°C)	4th Warmest	Warmest since: 1921	2012
Jan–Aug 1987 8-Month	55.4°F (13.0°C)	52.2°F (11.2°C)	3.2°F (1.8°C)	123rd Coolest	Coolest since: 1986	1904, 1912
	55.4°F (13.0°C)	52.2°F (11.2°C)	3.2°F (1.8°C)	6th Warmest	Warmest since: 1921	2012
	Ties: 2006
Dec 1986–Aug 1987 9-Month	52.7°F (11.5°C)	49.5°F (9.7°C)	3.2°F (1.8°C)	122nd Coolest	Coolest since: 1986	1904
Dec 1986–Aug 1987 9-Month	52.7°F (11.5°C)	49.5°F (9.7°C)	3.2°F (1.8°C)	6th Warmest	Warmest since: 1921	2012
Nov 1986–Aug 1987 10-Month	51.1°F (10.6°C)	48.5°F (9.2°C)	2.6°F (1.4°C)	119th Coolest	Coolest since: 1986	1904
	51.1°F (10.6°C)	48.5°F (9.2°C)	2.6°F (1.4°C)	9th Warmest	Warmest since: 1932	2012
	Ties: 1995, 1999, 2000, 2005
Oct 1986–Aug 1987 11-Month	51.4°F (10.8°C)	49.0°F (9.4°C)	2.4°F (1.4°C)	116th Coolest	Coolest since: 1986	1904
	51.4°F (10.8°C)	49.0°F (9.4°C)	2.4°F (1.4°C)	12th Warmest	Warmest since: 1954	2012
	Ties: 2005, 2006
Sep 1986–Aug 1987 12-Month	52.8°F (11.6°C)	50.3°F (10.2°C)	2.5°F (1.4°C)	117th Coolest	Coolest since: 1986	1904
	52.8°F (11.6°C)	50.3°F (10.2°C)	2.5°F (1.4°C)	11th Warmest	Warmest since: 1954	2012
	Ties: 1954
Mar 1986–Aug 1987 18-Month	56.2°F (13.4°C)	53.9°F (12.2°C)	2.3°F (1.2°C)	123rd Coolest	Coolest since: 1986	1904
	56.2°F (13.4°C)	53.9°F (12.2°C)	2.3°F (1.2°C)	5th Warmest	Warmest since: 1932	2012
	Ties: 1932, 2006
Sep 1985–Aug 1987 24-Month	52.0°F (11.1°C)	50.3°F (10.2°C)	1.7°F (0.9°C)	111th Coolest	Coolest since: 1986	1905
	52.0°F (11.1°C)	50.3°F (10.2°C)	1.7°F (0.9°C)	16th Warmest	Warmest since: 1955	2017
	Ties: 1991, 2005, 2022
Sep 1984–Aug 1987 36-Month	51.6°F (10.9°C)	50.3°F (10.2°C)	1.3°F (0.7°C)	103rd Coolest	Coolest since: 1986	1904
	51.6°F (10.9°C)	50.3°F (10.2°C)	1.3°F (0.7°C)	23rd Warmest	Warmest since: 1956	2018
	Ties: 1989, 1993
Sep 1983–Aug 1987 48-Month	51.0°F (10.6°C)	50.3°F (10.2°C)	0.7°F (0.4°C)	88th Coolest	Coolest since: 1986	1905
	51.0°F (10.6°C)	50.3°F (10.2°C)	0.7°F (0.4°C)	37th Warmest	Warmest since: 1957	2019
	Ties: 1923, 1994, 1999
Sep 1982–Aug 1987 60-Month	51.3°F (10.7°C)	50.3°F (10.2°C)	1.0°F (0.5°C)	95th Coolest	Coolest since: 1986	1906
	51.3°F (10.7°C)	50.3°F (10.2°C)	1.0°F (0.5°C)	29th Warmest	Warmest since: 1957	2020
	Ties: 1933, 1990, 1995, 1999, 2000

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published February 2023, retrieved on February 9, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings