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 1959

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1959 1-Month	65.5°F (18.6°C)	61.0°F (16.1°C)	4.5°F (2.5°C)	113th Coolest	Coolest since: 1958	1907
May 1959 1-Month	65.5°F (18.6°C)	61.0°F (16.1°C)	4.5°F (2.5°C)	16th Warmest	Warmest since: 1944	2018
Apr–May 1959 2-Month	57.8°F (14.3°C)	55.4°F (13.0°C)	2.4°F (1.3°C)	103rd Coolest	Coolest since: 1958	1907
Apr–May 1959 2-Month	57.8°F (14.3°C)	55.4°F (13.0°C)	2.4°F (1.3°C)	26th Warmest	Warmest since: 1955	1977
Mar–May 1959 3-Month	51.2°F (10.7°C)	49.7°F (9.8°C)	1.5°F (0.9°C)	92nd Coolest	Coolest since: 1958	1960
	51.2°F (10.7°C)	49.7°F (9.8°C)	1.5°F (0.9°C)	37th Warmest	Warmest since: 1955	2012
	Ties: 1999, 2003, 2015
Feb–May 1959 4-Month	45.2°F (7.3°C)	44.1°F (6.7°C)	1.1°F (0.6°C)	88th Coolest	Coolest since: 1958	1978
	45.2°F (7.3°C)	44.1°F (6.7°C)	1.1°F (0.6°C)	41st Warmest	Warmest since: 1957	2012
	Ties: 1949, 1981, 2011
Jan–May 1959 5-Month	40.0°F (4.4°C)	40.1°F (4.5°C)	-0.1°F (-0.1°C)	57th Coolest	Coolest since: 1958	1978
	40.0°F (4.4°C)	40.1°F (4.5°C)	-0.1°F (-0.1°C)	72nd Warmest	Warmest since: 1957	2012
	Ties: 1909, 2019
Dec 1958–May 1959 6-Month	37.0°F (2.8°C)	38.1°F (3.4°C)	-1.1°F (-0.6°C)	28th Coolest	Coolest since: 1951	1978
	37.0°F (2.8°C)	38.1°F (3.4°C)	-1.1°F (-0.6°C)	100th Warmest	Warmest since: 1958	2012
	Ties: 1916, 1924, 1947, 1961, 1962
Nov 1958–May 1959 7-Month	37.7°F (3.2°C)	38.3°F (3.5°C)	-0.6°F (-0.3°C)	40th Coolest	Coolest since: 1951	1904
	37.7°F (3.2°C)	38.3°F (3.5°C)	-0.6°F (-0.3°C)	88th Warmest	Warmest since: 1958	2012
	Ties: 1916, 1969
Oct 1958–May 1959 8-Month	39.8°F (4.3°C)	40.2°F (4.6°C)	-0.4°F (-0.3°C)	42nd Coolest	Coolest since: 1958	1904
	39.8°F (4.3°C)	40.2°F (4.6°C)	-0.4°F (-0.3°C)	86th Warmest	Warmest since: 1957	2012
	Ties: 1900, 1915, 1923, 2003
Sep 1958–May 1959 9-Month	42.6°F (5.9°C)	43.0°F (6.1°C)	-0.4°F (-0.2°C)	40th Coolest	Coolest since: 1958	1904
	42.6°F (5.9°C)	43.0°F (6.1°C)	-0.4°F (-0.2°C)	88th Warmest	Warmest since: 1957	2012
	Ties: 1908, 1916, 1944, 1967, 1971
Aug 1958–May 1959 10-Month	45.6°F (7.6°C)	45.9°F (7.7°C)	-0.3°F (-0.1°C)	44th Coolest	Coolest since: 1958	1904
	45.6°F (7.6°C)	45.9°F (7.7°C)	-0.3°F (-0.1°C)	84th Warmest	Warmest since: 1957	2012
	Ties: 1900, 1901, 1915, 1929, 1947, 1971
Jul 1958–May 1959 11-Month	48.0°F (8.9°C)	48.5°F (9.2°C)	-0.5°F (-0.3°C)	38th Coolest	Coolest since: 1958	1904
	48.0°F (8.9°C)	48.5°F (9.2°C)	-0.5°F (-0.3°C)	90th Warmest	Warmest since: 1957	2012
	Ties: 1907, 1969
Jun 1958–May 1959 12-Month	49.4°F (9.7°C)	50.3°F (10.2°C)	-0.9°F (-0.5°C)	26th Coolest	Coolest since: 1951	1904
	49.4°F (9.7°C)	50.3°F (10.2°C)	-0.9°F (-0.5°C)	102nd Warmest	Warmest since: 1958	2012
	Ties: 1993, 1994
Dec 1957–May 1959 18-Month	45.6°F (7.6°C)	46.3°F (7.9°C)	-0.7°F (-0.3°C)	34th Coolest	Coolest since: 1952	1905
	45.6°F (7.6°C)	46.3°F (7.9°C)	-0.7°F (-0.3°C)	93rd Warmest	Warmest since: 1958	2017
	Ties: 1910, 1911, 1929, 1961, 1962, 1964, 1983
Jun 1957–May 1959 24-Month	49.6°F (9.8°C)	50.3°F (10.2°C)	-0.7°F (-0.4°C)	27th Coolest	Coolest since: 1952	1905
	49.6°F (9.8°C)	50.3°F (10.2°C)	-0.7°F (-0.4°C)	100th Warmest	Warmest since: 1958	2017
	Ties: 1927, 1930
Jun 1956–May 1959 36-Month	50.1°F (10.1°C)	50.3°F (10.2°C)	-0.2°F (-0.1°C)	48th Coolest	Coolest since: 1953	1905, 1906
	50.1°F (10.1°C)	50.3°F (10.2°C)	-0.2°F (-0.1°C)	78th Warmest	Warmest since: 1958	2018
	Ties: 1995
Jun 1955–May 1959 48-Month	50.2°F (10.1°C)	50.2°F (10.1°C)	0.0°F (0.0°C)	50th Coolest	Coolest since: 1953	1905
	50.2°F (10.1°C)	50.2°F (10.1°C)	0.0°F (0.0°C)	75th Warmest	Warmest since: 1958	2019
	Ties: 1916, 1952, 1953, 1967, 1973
Jun 1954–May 1959 60-Month	50.7°F (10.4°C)	50.3°F (10.2°C)	0.4°F (0.2°C)	70th Coolest	Coolest since: 1954	1905, 1906, 1908
	50.7°F (10.4°C)	50.3°F (10.2°C)	0.4°F (0.2°C)	54th Warmest	Warmest since: 1958	2020
	Ties: 1946, 1949, 1950, 1954, 1975

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