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 1939

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1939 1-Month	74.8°F (23.8°C)	76.0°F (24.4°C)	-1.2°F (-0.6°C)	34th Coolest	Coolest since: 1929	1915
	74.8°F (23.8°C)	76.0°F (24.4°C)	-1.2°F (-0.6°C)	95th Warmest	Warmest since: 1938	1936
	Ties: 1902, 1911, 1963, 1965, 1999
Jul–Aug 1939 2-Month	76.5°F (24.7°C)	77.0°F (25.0°C)	-0.5°F (-0.3°C)	53rd Coolest	Coolest since: 1929	1967
	76.5°F (24.7°C)	77.0°F (25.0°C)	-0.5°F (-0.3°C)	76th Warmest	Warmest since: 1938	1936
	Ties: 1968
Jun–Aug 1939 3-Month	75.8°F (24.3°C)	75.9°F (24.4°C)	-0.1°F (-0.1°C)	56th Coolest	Coolest since: 1935	1915, 1927
	75.8°F (24.3°C)	75.9°F (24.4°C)	-0.1°F (-0.1°C)	73rd Warmest	Warmest since: 1938	1936
	Ties: 1897, 1898, 1940, 2008, 2017
May–Aug 1939 4-Month	73.6°F (23.1°C)	73.2°F (22.9°C)	0.4°F (0.2°C)	71st Coolest	Coolest since: 1935	1967
	73.6°F (23.1°C)	73.2°F (22.9°C)	0.4°F (0.2°C)	58th Warmest	Warmest since: 1938	1936
	Ties: 1931, 1957, 1965, 2021
Apr–Aug 1939 5-Month	69.4°F (20.8°C)	69.7°F (20.9°C)	-0.3°F (-0.1°C)	51st Coolest	Coolest since: 1935	1907
Apr–Aug 1939 5-Month	69.4°F (20.8°C)	69.7°F (20.9°C)	-0.3°F (-0.1°C)	78th Warmest	Warmest since: 1938	2010
Mar–Aug 1939 6-Month	65.7°F (18.7°C)	65.4°F (18.6°C)	0.3°F (0.1°C)	68th Coolest	Coolest since: 1937	1904
	65.7°F (18.7°C)	65.4°F (18.6°C)	0.3°F (0.1°C)	61st Warmest	Warmest since: 1938	2012
	Ties: 1902, 1948
Feb–Aug 1939 7-Month	61.2°F (16.2°C)	61.1°F (16.2°C)	0.1°F (0.0°C)	61st Coolest	Coolest since: 1937	1904
	61.2°F (16.2°C)	61.1°F (16.2°C)	0.1°F (0.0°C)	68th Warmest	Warmest since: 1938	2012
	Ties: 1909, 1948
Jan–Aug 1939 8-Month	58.3°F (14.6°C)	57.3°F (14.1°C)	1.0°F (0.5°C)	94th Coolest	Coolest since: 1937	1912
	58.3°F (14.6°C)	57.3°F (14.1°C)	1.0°F (0.5°C)	35th Warmest	Warmest since: 1938	2012
	Ties: 1919, 1941, 2001, 2018
Dec 1938–Aug 1939 9-Month	55.8°F (13.2°C)	54.8°F (12.7°C)	1.0°F (0.5°C)	90th Coolest	Coolest since: 1937	1904
	55.8°F (13.2°C)	54.8°F (12.7°C)	1.0°F (0.5°C)	38th Warmest	Warmest since: 1938	2012
	Ties: 1946, 1949
Nov 1938–Aug 1939 10-Month	54.8°F (12.7°C)	53.8°F (12.1°C)	1.0°F (0.6°C)	94th Coolest	Coolest since: 1937	1904
	54.8°F (12.7°C)	53.8°F (12.1°C)	1.0°F (0.6°C)	34th Warmest	Warmest since: 1938	2012
	Ties: 1946, 1949, 1952, 1988, 2018
Oct 1938–Aug 1939 11-Month	55.5°F (13.1°C)	54.2°F (12.3°C)	1.3°F (0.8°C)	105th Coolest	Coolest since: 1938	1904
	55.5°F (13.1°C)	54.2°F (12.3°C)	1.3°F (0.8°C)	23rd Warmest	Warmest since: 1934	2012
	Ties: 1914
Sep 1938–Aug 1939 12-Month	56.8°F (13.8°C)	55.4°F (13.0°C)	1.4°F (0.8°C)	109th Coolest	Coolest since: 1938	1904
	56.8°F (13.8°C)	55.4°F (13.0°C)	1.4°F (0.8°C)	19th Warmest	Warmest since: 1934	2012
	Ties: 1953, 1955
Mar 1938–Aug 1939 18-Month	60.4°F (15.8°C)	58.7°F (14.8°C)	1.7°F (1.0°C)	115th Coolest	Coolest since: 1938	1904
	60.4°F (15.8°C)	58.7°F (14.8°C)	1.7°F (1.0°C)	13th Warmest	Warmest since: 1934	2012
	Ties: 1955, 1987, 2000, 2002, 2007
Sep 1937–Aug 1939 24-Month	56.6°F (13.7°C)	55.4°F (13.0°C)	1.2°F (0.7°C)	106th Coolest	Coolest since: 1938	1979
	56.6°F (13.7°C)	55.4°F (13.0°C)	1.2°F (0.7°C)	21st Warmest	Warmest since: 1935	2017
	Ties: 1942, 2020
Sep 1936–Aug 1939 36-Month	56.2°F (13.4°C)	55.3°F (12.9°C)	0.9°F (0.5°C)	98th Coolest	Coolest since: 1938	1979
	56.2°F (13.4°C)	55.3°F (12.9°C)	0.9°F (0.5°C)	28th Warmest	Warmest since: 1936	2018
	Ties: 1922, 1936, 1957, 1987, 1993
Sep 1935–Aug 1939 48-Month	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	88th Coolest	Coolest since: 1938	1980
	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	37th Warmest	Warmest since: 1937	2019
	Ties: 1941, 1989, 1991, 1992, 1993, 2015
Sep 1934–Aug 1939 60-Month	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	87th Coolest	Coolest since: 1937	1906
	56.0°F (13.3°C)	55.4°F (13.0°C)	0.6°F (0.3°C)	37th Warmest	Warmest since: 1938	2020
	Ties: 1937, 1943, 1958, 1992

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings