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 8. Southwest

Average Temperature Rankings, August 1959

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1959 1-Month	78.4°F (25.8°C)	76.0°F (24.4°C)	2.4°F (1.4°C)	109th Coolest	Coolest since: 1958	1915
August 1959 1-Month	78.4°F (25.8°C)	76.0°F (24.4°C)	2.4°F (1.4°C)	20th Warmest	Warmest since: 1954	1936
Jul–Aug 1959 2-Month	77.5°F (25.3°C)	77.0°F (25.0°C)	0.5°F (0.3°C)	83rd Coolest	Coolest since: 1958	1967
Jul–Aug 1959 2-Month	77.5°F (25.3°C)	77.0°F (25.0°C)	0.5°F (0.3°C)	46th Warmest	Warmest since: 1955	1936
Jun–Aug 1959 3-Month	76.3°F (24.6°C)	75.9°F (24.4°C)	0.4°F (0.2°C)	78th Coolest	Coolest since: 1958	1915, 1927
	76.3°F (24.6°C)	75.9°F (24.4°C)	0.4°F (0.2°C)	51st Warmest	Warmest since: 1954	1936
	Ties: 1916, 1949, 1964, 1984
May–Aug 1959 4-Month	74.5°F (23.6°C)	73.2°F (22.9°C)	1.3°F (0.7°C)	97th Coolest	Coolest since: 1958	1967
May–Aug 1959 4-Month	74.5°F (23.6°C)	73.2°F (22.9°C)	1.3°F (0.7°C)	32nd Warmest	Warmest since: 1954	1936
Apr–Aug 1959 5-Month	70.9°F (21.6°C)	69.6°F (20.9°C)	1.3°F (0.7°C)	95th Coolest	Coolest since: 1958	1907
	70.9°F (21.6°C)	69.6°F (20.9°C)	1.3°F (0.7°C)	34th Warmest	Warmest since: 1955	2010
	Ties: 2022
Mar–Aug 1959 6-Month	66.6°F (19.2°C)	65.4°F (18.6°C)	1.2°F (0.6°C)	99th Coolest	Coolest since: 1958	1904
	66.6°F (19.2°C)	65.4°F (18.6°C)	1.2°F (0.6°C)	30th Warmest	Warmest since: 1955	2012
	Ties: 1964, 2018
Feb–Aug 1959 7-Month	62.2°F (16.8°C)	61.1°F (16.2°C)	1.1°F (0.6°C)	94th Coolest	Coolest since: 1958	1904
	62.2°F (16.8°C)	61.1°F (16.2°C)	1.1°F (0.6°C)	35th Warmest	Warmest since: 1957	2012
	Ties: 1896, 1957
Jan–Aug 1959 8-Month	58.0°F (14.4°C)	57.4°F (14.1°C)	0.6°F (0.3°C)	82nd Coolest	Coolest since: 1958	1912
	58.0°F (14.4°C)	57.4°F (14.1°C)	0.6°F (0.3°C)	47th Warmest	Warmest since: 1955	2012
	Ties: 1908, 1935, 1949, 1974
Dec 1958–Aug 1959 9-Month	54.9°F (12.7°C)	54.8°F (12.7°C)	0.1°F (0.0°C)	62nd Coolest	Coolest since: 1958	1904
	54.9°F (12.7°C)	54.8°F (12.7°C)	0.1°F (0.0°C)	66th Warmest	Warmest since: 1957	2012
	Ties: 2015
Nov 1958–Aug 1959 10-Month	54.2°F (12.3°C)	53.8°F (12.1°C)	0.4°F (0.2°C)	71st Coolest	Coolest since: 1958	1904
	54.2°F (12.3°C)	53.8°F (12.1°C)	0.4°F (0.2°C)	57th Warmest	Warmest since: 1957	2012
	Ties: 1944, 1981
Oct 1958–Aug 1959 11-Month	54.4°F (12.4°C)	54.1°F (12.3°C)	0.3°F (0.1°C)	68th Coolest	Coolest since: 1958	1904
	54.4°F (12.4°C)	54.1°F (12.3°C)	0.3°F (0.1°C)	60th Warmest	Warmest since: 1957	2012
	Ties: 1896, 1923, 1944, 2008
Sep 1958–Aug 1959 12-Month	55.6°F (13.1°C)	55.4°F (13.0°C)	0.2°F (0.1°C)	66th Coolest	Coolest since: 1958	1904
	55.6°F (13.1°C)	55.4°F (13.0°C)	0.2°F (0.1°C)	62nd Warmest	Warmest since: 1957	2012
	Ties: 1981
Mar 1958–Aug 1959 18-Month	58.4°F (14.7°C)	58.8°F (14.9°C)	-0.4°F (-0.2°C)	44th Coolest	Coolest since: 1958	1904
	58.4°F (14.7°C)	58.8°F (14.9°C)	-0.4°F (-0.2°C)	84th Warmest	Warmest since: 1957	2012
	Ties: 1906, 1950, 1973, 1975, 2009
Sep 1957–Aug 1959 24-Month	54.7°F (12.6°C)	55.4°F (13.0°C)	-0.7°F (-0.4°C)	23rd Coolest	Coolest since: 1951	1979
	54.7°F (12.6°C)	55.4°F (13.0°C)	-0.7°F (-0.4°C)	104th Warmest	Warmest since: 1958	2017
	Ties: 1927, 1960, 1963, 1982
Sep 1956–Aug 1959 36-Month	55.3°F (12.9°C)	55.4°F (13.0°C)	-0.1°F (-0.1°C)	52nd Coolest	Coolest since: 1958	1979
	55.3°F (12.9°C)	55.4°F (13.0°C)	-0.1°F (-0.1°C)	74th Warmest	Warmest since: 1957	2018
	Ties: 1927, 1995
Sep 1955–Aug 1959 48-Month	55.3°F (12.9°C)	55.4°F (13.0°C)	-0.1°F (-0.1°C)	47th Coolest	Coolest since: 1952	1980
	55.3°F (12.9°C)	55.4°F (13.0°C)	-0.1°F (-0.1°C)	78th Warmest	Warmest since: 1958	2019
	Ties: 1901, 1909, 1910, 1928, 1967
Sep 1954–Aug 1959 60-Month	55.6°F (13.1°C)	55.3°F (12.9°C)	0.3°F (0.2°C)	67th Coolest	Coolest since: 1953	1906
	55.6°F (13.1°C)	55.3°F (12.9°C)	0.3°F (0.2°C)	57th Warmest	Warmest since: 1958	2020
	Ties: 1922, 1940, 1949, 1950, 1975

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