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 1978

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1978 1-Month	59.6°F (15.3°C)	61.0°F (16.1°C)	-1.4°F (-0.8°C)	45th Coolest	Coolest since: 1976	1907
	59.6°F (15.3°C)	61.0°F (16.1°C)	-1.4°F (-0.8°C)	84th Warmest	Warmest since: 1977	2018
	Ties: 1996
Apr–May 1978 2-Month	55.4°F (13.0°C)	55.5°F (13.1°C)	-0.1°F (-0.1°C)	52nd Coolest	Coolest since: 1975	1907
	55.4°F (13.0°C)	55.5°F (13.1°C)	-0.1°F (-0.1°C)	77th Warmest	Warmest since: 1977	1977
	Ties: 1908, 1975
Mar–May 1978 3-Month	47.5°F (8.6°C)	49.7°F (9.8°C)	-2.2°F (-1.2°C)	20th Coolest	Coolest since: 1960	1960
	47.5°F (8.6°C)	49.7°F (9.8°C)	-2.2°F (-1.2°C)	109th Warmest	Warmest since: 1977	2012
	Ties: 1931
Feb–May 1978 4-Month	39.4°F (4.1°C)	44.2°F (6.8°C)	-4.8°F (-2.7°C)	1st Coolest	Coolest since: 1978	1978
Feb–May 1978 4-Month	39.4°F (4.1°C)	44.2°F (6.8°C)	-4.8°F (-2.7°C)	128th Warmest	Warmest since: 1977	2012
Jan–May 1978 5-Month	34.4°F (1.3°C)	40.1°F (4.5°C)	-5.7°F (-3.2°C)	1st Coolest	Coolest since: 1978	1978
Jan–May 1978 5-Month	34.4°F (1.3°C)	40.1°F (4.5°C)	-5.7°F (-3.2°C)	128th Warmest	Warmest since: 1977	2012
Dec 1977–May 1978 6-Month	32.6°F (0.3°C)	38.1°F (3.4°C)	-5.5°F (-3.1°C)	1st Coolest	Coolest since: 1978	1978
Dec 1977–May 1978 6-Month	32.6°F (0.3°C)	38.1°F (3.4°C)	-5.5°F (-3.1°C)	127th Warmest	Warmest since: 1977	2012
Nov 1977–May 1978 7-Month	33.8°F (1.0°C)	38.3°F (3.5°C)	-4.5°F (-2.5°C)	2nd Coolest	Coolest since: 1904	1904
Nov 1977–May 1978 7-Month	33.8°F (1.0°C)	38.3°F (3.5°C)	-4.5°F (-2.5°C)	126th Warmest	Warmest since: 1977	2012
Oct 1977–May 1978 8-Month	35.9°F (2.2°C)	40.2°F (4.6°C)	-4.3°F (-2.4°C)	2nd Coolest	Coolest since: 1904	1904
Oct 1977–May 1978 8-Month	35.9°F (2.2°C)	40.2°F (4.6°C)	-4.3°F (-2.4°C)	126th Warmest	Warmest since: 1977	2012
Sep 1977–May 1978 9-Month	39.3°F (4.1°C)	43.0°F (6.1°C)	-3.7°F (-2.0°C)	2nd Coolest	Coolest since: 1904	1904
Sep 1977–May 1978 9-Month	39.3°F (4.1°C)	43.0°F (6.1°C)	-3.7°F (-2.0°C)	126th Warmest	Warmest since: 1977	2012
Aug 1977–May 1978 10-Month	42.4°F (5.8°C)	45.9°F (7.7°C)	-3.5°F (-1.9°C)	2nd Coolest	Coolest since: 1904	1904
Aug 1977–May 1978 10-Month	42.4°F (5.8°C)	45.9°F (7.7°C)	-3.5°F (-1.9°C)	126th Warmest	Warmest since: 1977	2012
Jul 1977–May 1978 11-Month	45.5°F (7.5°C)	48.5°F (9.2°C)	-3.0°F (-1.7°C)	2nd Coolest	Coolest since: 1918	1904
	45.5°F (7.5°C)	48.5°F (9.2°C)	-3.0°F (-1.7°C)	126th Warmest	Warmest since: 1977	2012
	Ties: 1918
Jun 1977–May 1978 12-Month	47.4°F (8.6°C)	50.3°F (10.2°C)	-2.9°F (-1.6°C)	3rd Coolest	Coolest since: 1918	1904
Jun 1977–May 1978 12-Month	47.4°F (8.6°C)	50.3°F (10.2°C)	-2.9°F (-1.6°C)	125th Warmest	Warmest since: 1977	2012
Dec 1976–May 1978 18-Month	44.2°F (6.8°C)	46.3°F (7.9°C)	-2.1°F (-1.1°C)	5th Coolest	Coolest since: 1918	1905
Dec 1976–May 1978 18-Month	44.2°F (6.8°C)	46.3°F (7.9°C)	-2.1°F (-1.1°C)	122nd Warmest	Warmest since: 1977	2017
Jun 1976–May 1978 24-Month	47.9°F (8.8°C)	50.3°F (10.2°C)	-2.4°F (-1.4°C)	2nd Coolest	Coolest since: 1905	1905
Jun 1976–May 1978 24-Month	47.9°F (8.8°C)	50.3°F (10.2°C)	-2.4°F (-1.4°C)	125th Warmest	Warmest since: 1977	2017
Jun 1975–May 1978 36-Month	49.2°F (9.6°C)	50.3°F (10.2°C)	-1.1°F (-0.6°C)	11th Coolest	Coolest since: 1970	1905, 1906
	49.2°F (9.6°C)	50.3°F (10.2°C)	-1.1°F (-0.6°C)	115th Warmest	Warmest since: 1977	2018
	Ties: 1970
Jun 1974–May 1978 48-Month	49.4°F (9.7°C)	50.3°F (10.2°C)	-0.9°F (-0.5°C)	14th Coolest	Coolest since: 1971	1905
	49.4°F (9.7°C)	50.3°F (10.2°C)	-0.9°F (-0.5°C)	111th Warmest	Warmest since: 1977	2019
	Ties: 1912, 1970, 1971
Jun 1973–May 1978 60-Month	49.8°F (9.9°C)	50.2°F (10.1°C)	-0.4°F (-0.2°C)	29th Coolest	Coolest since: 1972	1905, 1906, 1908
	49.8°F (9.9°C)	50.2°F (10.1°C)	-0.4°F (-0.2°C)	95th Warmest	Warmest since: 1977	2020
	Ties: 1900, 1911, 1921, 1927, 1964, 1969, 1972, 1983

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published December 2022, retrieved on December 8, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings