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, May 2015

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 2015 1-Month	64.9°F (18.3°C)	61.0°F (16.1°C)	3.9°F (2.2°C)	110th Coolest	Coolest since: 2014	1907
May 2015 1-Month	64.9°F (18.3°C)	61.0°F (16.1°C)	3.9°F (2.2°C)	19th Warmest	Warmest since: 2012	2018
Apr–May 2015 2-Month	58.8°F (14.9°C)	55.4°F (13.0°C)	3.4°F (1.9°C)	116th Coolest	Coolest since: 2014	1907
	58.8°F (14.9°C)	55.4°F (13.0°C)	3.4°F (1.9°C)	13th Warmest	Warmest since: 2012	1977
	Ties: 1964, 1986
Mar–May 2015 3-Month	51.2°F (10.7°C)	49.7°F (9.8°C)	1.5°F (0.9°C)	92nd Coolest	Coolest since: 2014	1960
	51.2°F (10.7°C)	49.7°F (9.8°C)	1.5°F (0.9°C)	37th Warmest	Warmest since: 2012	2012
	Ties: 1959, 1999, 2003
Feb–May 2015 4-Month	42.8°F (6.0°C)	44.1°F (6.7°C)	-1.3°F (-0.7°C)	33rd Coolest	Coolest since: 2014	1978
	42.8°F (6.0°C)	44.1°F (6.7°C)	-1.3°F (-0.7°C)	96th Warmest	Warmest since: 2013	2012
	Ties: 1937, 1966, 1967, 1982
Jan–May 2015 5-Month	38.9°F (3.8°C)	40.1°F (4.5°C)	-1.2°F (-0.7°C)	33rd Coolest	Coolest since: 2014	1978
	38.9°F (3.8°C)	40.1°F (4.5°C)	-1.2°F (-0.7°C)	96th Warmest	Warmest since: 2013	2012
	Ties: 1907
Dec 2014–May 2015 6-Month	37.9°F (3.3°C)	38.1°F (3.4°C)	-0.2°F (-0.1°C)	50th Coolest	Coolest since: 2014	1978
	37.9°F (3.3°C)	38.1°F (3.4°C)	-0.2°F (-0.1°C)	78th Warmest	Warmest since: 2013	2012
	Ties: 1906, 1935, 1945, 1958, 2001
Nov 2014–May 2015 7-Month	37.3°F (2.9°C)	38.3°F (3.5°C)	-1.0°F (-0.6°C)	26th Coolest	Coolest since: 2014	1904
	37.3°F (2.9°C)	38.3°F (3.5°C)	-1.0°F (-0.6°C)	102nd Warmest	Warmest since: 2013	2012
	Ties: 1900, 1968
Oct 2014–May 2015 8-Month	39.3°F (4.1°C)	40.2°F (4.6°C)	-0.9°F (-0.5°C)	31st Coolest	Coolest since: 2014	1904
Oct 2014–May 2015 8-Month	39.3°F (4.1°C)	40.2°F (4.6°C)	-0.9°F (-0.5°C)	97th Warmest	Warmest since: 2013	2012
Sep 2014–May 2015 9-Month	42.0°F (5.6°C)	43.0°F (6.1°C)	-1.0°F (-0.5°C)	30th Coolest	Coolest since: 2014	1904
Sep 2014–May 2015 9-Month	42.0°F (5.6°C)	43.0°F (6.1°C)	-1.0°F (-0.5°C)	98th Warmest	Warmest since: 2013	2012
Aug 2014–May 2015 10-Month	45.0°F (7.2°C)	45.8°F (7.7°C)	-0.8°F (-0.5°C)	29th Coolest	Coolest since: 2014	1904
	45.0°F (7.2°C)	45.8°F (7.7°C)	-0.8°F (-0.5°C)	99th Warmest	Warmest since: 2013	2012
	Ties: 1960
Jul 2014–May 2015 11-Month	47.2°F (8.4°C)	48.5°F (9.2°C)	-1.3°F (-0.8°C)	19th Coolest	Coolest since: 2014	1904
	47.2°F (8.4°C)	48.5°F (9.2°C)	-1.3°F (-0.8°C)	109th Warmest	Warmest since: 2013	2012
	Ties: 1970
Jun 2014–May 2015 12-Month	49.3°F (9.6°C)	50.3°F (10.2°C)	-1.0°F (-0.6°C)	22nd Coolest	Coolest since: 2014	1904
	49.3°F (9.6°C)	50.3°F (10.2°C)	-1.0°F (-0.6°C)	106th Warmest	Warmest since: 2013	2012
	Ties: 1908, 1910, 1997
Dec 2013–May 2015 18-Month	44.3°F (6.8°C)	46.2°F (7.9°C)	-1.9°F (-1.1°C)	6th Coolest	Coolest since: 1980	1905
	44.3°F (6.8°C)	46.2°F (7.9°C)	-1.9°F (-1.1°C)	121st Warmest	Warmest since: 2014	2017
	Ties: 1980
Jun 2013–May 2015 24-Month	48.8°F (9.3°C)	50.3°F (10.2°C)	-1.5°F (-0.9°C)	6th Coolest	Coolest since: 1979	1905
Jun 2013–May 2015 24-Month	48.8°F (9.3°C)	50.3°F (10.2°C)	-1.5°F (-0.9°C)	121st Warmest	Warmest since: 2014	2017
Jun 2012–May 2015 36-Month	49.7°F (9.8°C)	50.2°F (10.1°C)	-0.5°F (-0.3°C)	27th Coolest	Coolest since: 1981	1905, 1906
	49.7°F (9.8°C)	50.2°F (10.1°C)	-0.5°F (-0.3°C)	99th Warmest	Warmest since: 2014	2018
	Ties: 1910, 1914, 1928, 1952, 1961, 1981
Jun 2011–May 2015 48-Month	51.1°F (10.6°C)	50.3°F (10.2°C)	0.8°F (0.4°C)	89th Coolest	Coolest since: 2011	1905
	51.1°F (10.6°C)	50.3°F (10.2°C)	0.8°F (0.4°C)	36th Warmest	Warmest since: 2014	2019
	Ties: 1923, 1987, 1999
Jun 2010–May 2015 60-Month	51.1°F (10.6°C)	50.3°F (10.2°C)	0.8°F (0.4°C)	90th Coolest	Coolest since: 2011	1905, 1906, 1908
	51.1°F (10.6°C)	50.3°F (10.2°C)	0.8°F (0.4°C)	34th Warmest	Warmest since: 2014	2020
	Ties: 1923, 1933, 1942, 1987, 1988, 1995

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on February 7, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings