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 1966

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1966 1-Month	73.1°F (22.8°C)	76.0°F (24.4°C)	-2.9°F (-1.6°C)	12th Coolest	Coolest since: 1950	1915
	73.1°F (22.8°C)	76.0°F (24.4°C)	-2.9°F (-1.6°C)	117th Warmest	Warmest since: 1965	1936
	Ties: 1994
Jul–Aug 1966 2-Month	77.1°F (25.1°C)	77.0°F (25.0°C)	0.1°F (0.1°C)	71st Coolest	Coolest since: 1965	1967
	77.1°F (25.1°C)	77.0°F (25.0°C)	0.1°F (0.1°C)	58th Warmest	Warmest since: 1959	1936
	Ties: 1956, 1973, 1978
Jun–Aug 1966 3-Month	75.6°F (24.2°C)	75.9°F (24.4°C)	-0.3°F (-0.2°C)	50th Coolest	Coolest since: 1965	1915, 1927
	75.6°F (24.2°C)	75.9°F (24.4°C)	-0.3°F (-0.2°C)	79th Warmest	Warmest since: 1964	1936
	Ties: 1935, 1942, 1948, 2000
May–Aug 1966 4-Month	72.3°F (22.4°C)	73.2°F (22.9°C)	-0.9°F (-0.5°C)	34th Coolest	Coolest since: 1961	1967
	72.3°F (22.4°C)	73.2°F (22.9°C)	-0.9°F (-0.5°C)	95th Warmest	Warmest since: 1965	1936
	Ties: 2003, 2009
Apr–Aug 1966 5-Month	68.5°F (20.3°C)	69.6°F (20.9°C)	-1.1°F (-0.6°C)	21st Coolest	Coolest since: 1961	1907
	68.5°F (20.3°C)	69.6°F (20.9°C)	-1.1°F (-0.6°C)	108th Warmest	Warmest since: 1965	2010
	Ties: 1897, 1971, 1979
Mar–Aug 1966 6-Month	64.8°F (18.2°C)	65.5°F (18.6°C)	-0.7°F (-0.4°C)	32nd Coolest	Coolest since: 1961	1904
	64.8°F (18.2°C)	65.5°F (18.6°C)	-0.7°F (-0.4°C)	97th Warmest	Warmest since: 1965	2012
	Ties: 1967, 1982, 2008
Feb–Aug 1966 7-Month	60.2°F (15.7°C)	61.1°F (16.2°C)	-0.9°F (-0.5°C)	33rd Coolest	Coolest since: 1961	1904
	60.2°F (15.7°C)	61.1°F (16.2°C)	-0.9°F (-0.5°C)	96th Warmest	Warmest since: 1965	2012
	Ties: 1900, 1967, 1996, 2008
Jan–Aug 1966 8-Month	56.0°F (13.3°C)	57.3°F (14.1°C)	-1.3°F (-0.8°C)	20th Coolest	Coolest since: 1961	1912
	56.0°F (13.3°C)	57.3°F (14.1°C)	-1.3°F (-0.8°C)	109th Warmest	Warmest since: 1965	2012
	Ties: 1961
Dec 1965–Aug 1966 9-Month	54.4°F (12.4°C)	54.8°F (12.7°C)	-0.4°F (-0.3°C)	41st Coolest	Coolest since: 1963	1904
	54.4°F (12.4°C)	54.8°F (12.7°C)	-0.4°F (-0.3°C)	87th Warmest	Warmest since: 1965	2012
	Ties: 1962, 1977
Nov 1965–Aug 1966 10-Month	53.9°F (12.2°C)	53.8°F (12.1°C)	0.1°F (0.1°C)	57th Coolest	Coolest since: 1965	1904
	53.9°F (12.2°C)	53.8°F (12.1°C)	0.1°F (0.1°C)	71st Warmest	Warmest since: 1965	2012
	Ties: 1898, 1923, 1964, 1965, 1967, 1975, 1989
Oct 1965–Aug 1966 11-Month	54.1°F (12.3°C)	54.1°F (12.3°C)	0.0°F (0.0°C)	53rd Coolest	Coolest since: 1965	1904
	54.1°F (12.3°C)	54.1°F (12.3°C)	0.0°F (0.0°C)	75th Warmest	Warmest since: 1964	2012
	Ties: 1948, 1975
Sep 1965–Aug 1966 12-Month	55.3°F (12.9°C)	55.4°F (13.0°C)	-0.1°F (-0.1°C)	52nd Coolest	Coolest since: 1965	1904
	55.3°F (12.9°C)	55.4°F (13.0°C)	-0.1°F (-0.1°C)	76th Warmest	Warmest since: 1964	2012
	Ties: 1928, 1944, 1962, 2009, 2013
Mar 1965–Aug 1966 18-Month	58.5°F (14.7°C)	58.7°F (14.8°C)	-0.2°F (-0.1°C)	50th Coolest	Coolest since: 1963	1904
	58.5°F (14.7°C)	58.7°F (14.8°C)	-0.2°F (-0.1°C)	78th Warmest	Warmest since: 1965	2012
	Ties: 1913, 1925, 1936, 1945, 1990
Sep 1964–Aug 1966 24-Month	55.2°F (12.9°C)	55.4°F (13.0°C)	-0.2°F (-0.1°C)	47th Coolest	Coolest since: 1964	1979
	55.2°F (12.9°C)	55.4°F (13.0°C)	-0.2°F (-0.1°C)	80th Warmest	Warmest since: 1965	2017
	Ties: 1925, 1964, 1990
Sep 1963–Aug 1966 36-Month	55.5°F (13.1°C)	55.4°F (13.0°C)	0.1°F (0.1°C)	69th Coolest	Coolest since: 1965	1979
	55.5°F (13.1°C)	55.4°F (13.0°C)	0.1°F (0.1°C)	57th Warmest	Warmest since: 1957	2018
	Ties: 1909, 1915, 1916, 1924, 1947, 1950, 1973, 1975
Sep 1962–Aug 1966 48-Month	55.2°F (12.9°C)	55.3°F (12.9°C)	-0.1°F (0.0°C)	40th Coolest	Coolest since: 1965	1980
	55.2°F (12.9°C)	55.3°F (12.9°C)	-0.1°F (0.0°C)	85th Warmest	Warmest since: 1965	2019
	Ties: 1903, 1926, 1952, 1965, 1977, 1983
Sep 1961–Aug 1966 60-Month	55.2°F (12.9°C)	55.3°F (12.9°C)	-0.1°F (0.0°C)	47th Coolest	Coolest since: 1965	1906
	55.2°F (12.9°C)	55.3°F (12.9°C)	-0.1°F (0.0°C)	77th Warmest	Warmest since: 1959	2020
	Ties: 1901, 1914, 1931, 1977, 1996

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2023, retrieved on March 25, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings