Statewide 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

Average Temperature Rankings, August 1909

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Record Coolest

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
August 1909 1-Month	76.3°F (24.6°C)	73.4°F (23.0°C)	2.9°F (1.6°C)	113th Coolest	Coolest since: 1908	1915
August 1909 1-Month	76.3°F (24.6°C)	73.4°F (23.0°C)	2.9°F (1.6°C)	16th Warmest	Warmest since: 1900	1947
Jul–Aug 1909 2-Month	74.6°F (23.7°C)	74.5°F (23.6°C)	0.1°F (0.1°C)	68th Coolest	Coolest since: 1908	1915
	74.6°F (23.7°C)	74.5°F (23.6°C)	0.1°F (0.1°C)	61st Warmest	Warmest since: 1901	1936
	Ties: 1969
Jun–Aug 1909 3-Month	73.5°F (23.1°C)	73.5°F (23.1°C)	0.0°F (0.0°C)	63rd Coolest	Coolest since: 1908	1915
	73.5°F (23.1°C)	73.5°F (23.1°C)	0.0°F (0.0°C)	66th Warmest	Warmest since: 1901	1936
	Ties: 1935
May–Aug 1909 4-Month	70.0°F (21.1°C)	70.6°F (21.4°C)	-0.6°F (-0.3°C)	42nd Coolest	Coolest since: 1908	1915
	70.0°F (21.1°C)	70.6°F (21.4°C)	-0.6°F (-0.3°C)	87th Warmest	Warmest since: 1908	1936
	Ties: 1908, 1948, 1968, 1969
Apr–Aug 1909 5-Month	65.8°F (18.8°C)	66.8°F (19.3°C)	-1.0°F (-0.5°C)	29th Coolest	Coolest since: 1907	1907
Apr–Aug 1909 5-Month	65.8°F (18.8°C)	66.8°F (19.3°C)	-1.0°F (-0.5°C)	100th Warmest	Warmest since: 1908	1934
Mar–Aug 1909 6-Month	61.2°F (16.2°C)	62.3°F (16.8°C)	-1.1°F (-0.6°C)	25th Coolest	Coolest since: 1907	1950, 1960
	61.2°F (16.2°C)	62.3°F (16.8°C)	-1.1°F (-0.6°C)	104th Warmest	Warmest since: 1908	2012
	Ties: 1940, 1965, 1969, 1971, 1978, 1982
Feb–Aug 1909 7-Month	57.1°F (13.9°C)	57.6°F (14.2°C)	-0.5°F (-0.3°C)	48th Coolest	Coolest since: 1907	1904
	57.1°F (13.9°C)	57.6°F (14.2°C)	-0.5°F (-0.3°C)	81st Warmest	Warmest since: 1908	2012
	Ties: 1937
Jan–Aug 1909 8-Month	53.5°F (11.9°C)	53.6°F (12.0°C)	-0.1°F (-0.1°C)	65th Coolest	Coolest since: 1907	1912
	53.5°F (11.9°C)	53.6°F (12.0°C)	-0.1°F (-0.1°C)	64th Warmest	Warmest since: 1908	2012
	Ties: 1936, 1975, 2019
Dec 1908–Aug 1909 9-Month	51.0°F (10.6°C)	50.9°F (10.5°C)	0.1°F (0.1°C)	70th Coolest	Coolest since: 1907	1904
	51.0°F (10.6°C)	50.9°F (10.5°C)	0.1°F (0.1°C)	58th Warmest	Warmest since: 1908	2012
	Ties: 1898, 1937, 1956, 1975
Nov 1908–Aug 1909 10-Month	50.1°F (10.1°C)	49.9°F (9.9°C)	0.2°F (0.2°C)	70th Coolest	Coolest since: 1908	1904
	50.1°F (10.1°C)	49.9°F (9.9°C)	0.2°F (0.2°C)	58th Warmest	Warmest since: 1908	2012
	Ties: 1908, 1975
Oct 1908–Aug 1909 11-Month	50.5°F (10.3°C)	50.3°F (10.2°C)	0.2°F (0.1°C)	68th Coolest	Coolest since: 1908	1904
	50.5°F (10.3°C)	50.3°F (10.2°C)	0.2°F (0.1°C)	60th Warmest	Warmest since: 1901	2012
	Ties: 1959, 1981, 2013
Sep 1908–Aug 1909 12-Month	52.0°F (11.1°C)	51.6°F (10.9°C)	0.4°F (0.2°C)	75th Coolest	Coolest since: 1908	1904
	52.0°F (11.1°C)	51.6°F (10.9°C)	0.4°F (0.2°C)	53rd Warmest	Warmest since: 1901	2012
	Ties: 1935, 1981, 2008
Mar 1908–Aug 1909 18-Month	55.5°F (13.1°C)	55.2°F (12.9°C)	0.3°F (0.2°C)	72nd Coolest	Coolest since: 1908	1904
	55.5°F (13.1°C)	55.2°F (12.9°C)	0.3°F (0.2°C)	56th Warmest	Warmest since: 1901	2012
	Ties: 1933, 1943, 1946, 1981, 2001
Sep 1907–Aug 1909 24-Month	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	65th Coolest	Coolest since: 1908	1905
	51.7°F (10.9°C)	51.6°F (10.9°C)	0.1°F (0.0°C)	62nd Warmest	Warmest since: 1901	2017
	Ties: 1948, 1993, 1996
Sep 1906–Aug 1909 36-Month	51.5°F (10.8°C)	51.6°F (10.9°C)	-0.1°F (-0.1°C)	51st Coolest	Coolest since: 1908	1979
	51.5°F (10.8°C)	51.6°F (10.9°C)	-0.1°F (-0.1°C)	75th Warmest	Warmest since: 1898	2018
	Ties: 1930, 1945, 1953, 1959, 1986
Sep 1905–Aug 1909 48-Month	51.4°F (10.8°C)	51.6°F (10.9°C)	-0.2°F (-0.1°C)	42nd Coolest	Coolest since: 1908	1905
	51.4°F (10.8°C)	51.6°F (10.9°C)	-0.2°F (-0.1°C)	83rd Warmest	Warmest since: 1901	2019
	Ties: 1951, 1952, 1953, 1966, 1973, 1984
Sep 1904–Aug 1909 60-Month	51.2°F (10.7°C)	51.6°F (10.9°C)	-0.4°F (-0.2°C)	28th Coolest	Coolest since: 1908	1906
	51.2°F (10.7°C)	51.6°F (10.9°C)	-0.4°F (-0.2°C)	96th Warmest	Warmest since: 1902	2020
	Ties: 1902, 1960, 1961, 1983

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 24, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings