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 7. East Southeast

Average Temperature Rankings, September 1909

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 1909 1-Month	64.9°F (18.3°C)	67.4°F (19.7°C)	-2.5°F (-1.4°C)	20th Coolest	Coolest since: 1902	1918
September 1909 1-Month	64.9°F (18.3°C)	67.4°F (19.7°C)	-2.5°F (-1.4°C)	109th Warmest	Warmest since: 1908	1925
Aug–Sep 1909 2-Month	70.8°F (21.6°C)	70.8°F (21.6°C)	0.0°F (0.0°C)	68th Coolest	Coolest since: 1907	1967
	70.8°F (21.6°C)	70.8°F (21.6°C)	0.0°F (0.0°C)	61st Warmest	Warmest since: 1908	1936
	Ties: 1940, 1968, 1990
Jul–Sep 1909 3-Month	71.6°F (22.0°C)	72.6°F (22.6°C)	-1.0°F (-0.6°C)	34th Coolest	Coolest since: 1907	1967
	71.6°F (22.0°C)	72.6°F (22.6°C)	-1.0°F (-0.6°C)	95th Warmest	Warmest since: 1908	1936
	Ties: 1945, 1949, 1958, 2000
Jun–Sep 1909 4-Month	71.9°F (22.2°C)	72.6°F (22.6°C)	-0.7°F (-0.4°C)	43rd Coolest	Coolest since: 1907	1967
	71.9°F (22.2°C)	72.6°F (22.6°C)	-0.7°F (-0.4°C)	86th Warmest	Warmest since: 1908	1936
	Ties: 2001
May–Sep 1909 5-Month	69.6°F (20.9°C)	70.7°F (21.5°C)	-1.1°F (-0.6°C)	26th Coolest	Coolest since: 1907	1924
	69.6°F (20.9°C)	70.7°F (21.5°C)	-1.1°F (-0.6°C)	103rd Warmest	Warmest since: 1908	1936
	Ties: 1903, 1935, 1963, 1994
Apr–Sep 1909 6-Month	66.5°F (19.2°C)	67.7°F (19.8°C)	-1.2°F (-0.6°C)	22nd Coolest	Coolest since: 1907	1907
	66.5°F (19.2°C)	67.7°F (19.8°C)	-1.2°F (-0.6°C)	107th Warmest	Warmest since: 1908	2010
	Ties: 1915, 1989
Mar–Sep 1909 7-Month	62.8°F (17.1°C)	64.0°F (17.8°C)	-1.2°F (-0.7°C)	18th Coolest	Coolest since: 1907	1924
	62.8°F (17.1°C)	64.0°F (17.8°C)	-1.2°F (-0.7°C)	111th Warmest	Warmest since: 1908	2012
	Ties: 1923, 1947, 1992
Feb–Sep 1909 8-Month	59.3°F (15.2°C)	59.9°F (15.5°C)	-0.6°F (-0.3°C)	46th Coolest	Coolest since: 1907	1904, 1924
	59.3°F (15.2°C)	59.9°F (15.5°C)	-0.6°F (-0.3°C)	83rd Warmest	Warmest since: 1908	2012
	Ties: 1901, 1965, 1994, 2003
Jan–Sep 1909 9-Month	56.1°F (13.4°C)	56.4°F (13.6°C)	-0.3°F (-0.2°C)	55th Coolest	Coolest since: 1907	1979
	56.1°F (13.4°C)	56.4°F (13.6°C)	-0.3°F (-0.2°C)	74th Warmest	Warmest since: 1908	2012
	Ties: 1901, 1906, 1989
Dec 1908–Sep 1909 10-Month	53.9°F (12.2°C)	53.9°F (12.2°C)	0.0°F (0.0°C)	68th Coolest	Coolest since: 1907	1904
	53.9°F (12.2°C)	53.9°F (12.2°C)	0.0°F (0.0°C)	60th Warmest	Warmest since: 1908	2012
	Ties: 1936, 1943, 1948, 1981, 1985
Nov 1908–Sep 1909 11-Month	53.0°F (11.7°C)	52.9°F (11.6°C)	0.1°F (0.1°C)	67th Coolest	Coolest since: 1907	1904
	53.0°F (11.7°C)	52.9°F (11.6°C)	0.1°F (0.1°C)	61st Warmest	Warmest since: 1908	2012
	Ties: 1900
Oct 1908–Sep 1909 12-Month	53.1°F (11.7°C)	53.1°F (11.7°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1907	1904
	53.1°F (11.7°C)	53.1°F (11.7°C)	0.0°F (0.0°C)	71st Warmest	Warmest since: 1908	2012
	Ties: 1916
Apr 1908–Sep 1909 18-Month	58.1°F (14.5°C)	58.0°F (14.4°C)	0.1°F (0.1°C)	68th Coolest	Coolest since: 1908	1918
	58.1°F (14.5°C)	58.0°F (14.4°C)	0.1°F (0.1°C)	60th Warmest	Warmest since: 1901	2012
	Ties: 1898, 1925, 1945, 1965
Oct 1907–Sep 1909 24-Month	53.2°F (11.8°C)	53.1°F (11.7°C)	0.1°F (0.1°C)	71st Coolest	Coolest since: 1908	1979
	53.2°F (11.8°C)	53.1°F (11.7°C)	0.1°F (0.1°C)	56th Warmest	Warmest since: 1901	2017
	Ties: 1920, 1965, 1972, 1975, 1989, 1993, 1996, 2004, 2009
Oct 1906–Sep 1909 36-Month	52.8°F (11.6°C)	53.1°F (11.7°C)	-0.3°F (-0.1°C)	41st Coolest	Coolest since: 1908	1979
	52.8°F (11.6°C)	53.1°F (11.7°C)	-0.3°F (-0.1°C)	85th Warmest	Warmest since: 1898	2018
	Ties: 1910, 1930, 1951, 1977, 1983, 1994, 1996, 1997
Oct 1905–Sep 1909 48-Month	52.7°F (11.5°C)	53.0°F (11.7°C)	-0.3°F (-0.2°C)	34th Coolest	Coolest since: 1908	1980
	52.7°F (11.5°C)	53.0°F (11.7°C)	-0.3°F (-0.2°C)	91st Warmest	Warmest since: 1903	2019
	Ties: 1915, 1917, 1928, 1930, 1960, 1965, 1985
Oct 1904–Sep 1909 60-Month	52.6°F (11.4°C)	53.1°F (11.7°C)	-0.5°F (-0.3°C)	27th Coolest	Coolest since: 1908	1982
	52.6°F (11.4°C)	53.1°F (11.7°C)	-0.5°F (-0.3°C)	97th Warmest	Warmest since: 1901	2020
	Ties: 1900, 1910, 1927, 1961, 1965, 1984, 1997

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 30, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings