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, September 1930

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 1930 1-Month	68.5°F (20.3°C)	66.2°F (19.0°C)	2.3°F (1.3°C)	96th Coolest	Coolest since: 1929	1918
	68.5°F (20.3°C)	66.2°F (19.0°C)	2.3°F (1.3°C)	33rd Warmest	Warmest since: 1927	1925, 1933
	Ties: 1920
Aug–Sep 1930 2-Month	71.9°F (22.2°C)	69.8°F (21.0°C)	2.1°F (1.2°C)	103rd Coolest	Coolest since: 1929	1967
Aug–Sep 1930 2-Month	71.9°F (22.2°C)	69.8°F (21.0°C)	2.1°F (1.2°C)	26th Warmest	Warmest since: 1925	1936
Jul–Sep 1930 3-Month	74.1°F (23.4°C)	71.8°F (22.1°C)	2.3°F (1.3°C)	118th Coolest	Coolest since: 1929	1967
Jul–Sep 1930 3-Month	74.1°F (23.4°C)	71.8°F (22.1°C)	2.3°F (1.3°C)	11th Warmest	Warmest since: 1921	1936
Jun–Sep 1930 4-Month	73.3°F (22.9°C)	71.6°F (22.0°C)	1.7°F (0.9°C)	106th Coolest	Coolest since: 1929	1915, 1924
	73.3°F (22.9°C)	71.6°F (22.0°C)	1.7°F (0.9°C)	23rd Warmest	Warmest since: 1925	1936
	Ties: 1941
May–Sep 1930 5-Month	71.3°F (21.8°C)	69.8°F (21.0°C)	1.5°F (0.8°C)	103rd Coolest	Coolest since: 1929	1924
	71.3°F (21.8°C)	69.8°F (21.0°C)	1.5°F (0.8°C)	26th Warmest	Warmest since: 1921	1936
	Ties: 1977
Apr–Sep 1930 6-Month	68.5°F (20.3°C)	66.7°F (19.3°C)	1.8°F (1.0°C)	111th Coolest	Coolest since: 1929	1907
	68.5°F (20.3°C)	66.7°F (19.3°C)	1.8°F (1.0°C)	18th Warmest	Warmest since: 1925	2010
	Ties: 1925
Mar–Sep 1930 7-Month	64.2°F (17.9°C)	62.8°F (17.1°C)	1.4°F (0.8°C)	104th Coolest	Coolest since: 1929	1924
	64.2°F (17.9°C)	62.8°F (17.1°C)	1.4°F (0.8°C)	25th Warmest	Warmest since: 1925	2012
	Ties: 2017, 2018
Feb–Sep 1930 8-Month	61.0°F (16.1°C)	58.6°F (14.8°C)	2.4°F (1.3°C)	117th Coolest	Coolest since: 1929	1904
	61.0°F (16.1°C)	58.6°F (14.8°C)	2.4°F (1.3°C)	12th Warmest	Warmest since: 1925	2012
	Ties: 1925, 1977
Jan–Sep 1930 9-Month	56.3°F (13.5°C)	54.9°F (12.7°C)	1.4°F (0.8°C)	98th Coolest	Coolest since: 1929	1904, 1912
	56.3°F (13.5°C)	54.9°F (12.7°C)	1.4°F (0.8°C)	31st Warmest	Warmest since: 1925	2012
	Ties: 1944, 1983, 1999
Dec 1929–Sep 1930 10-Month	53.6°F (12.0°C)	52.4°F (11.3°C)	1.2°F (0.7°C)	95th Coolest	Coolest since: 1929	1904
	53.6°F (12.0°C)	52.4°F (11.3°C)	1.2°F (0.7°C)	33rd Warmest	Warmest since: 1925	2012
	Ties: 1914, 1925, 1952, 1995
Nov 1929–Sep 1930 11-Month	52.0°F (11.1°C)	51.3°F (10.7°C)	0.7°F (0.4°C)	86th Coolest	Coolest since: 1929	1904
	52.0°F (11.1°C)	51.3°F (10.7°C)	0.7°F (0.4°C)	42nd Warmest	Warmest since: 1925	2012
	Ties: 1896, 1946, 1986, 2013
Oct 1929–Sep 1930 12-Month	52.1°F (11.2°C)	51.6°F (10.9°C)	0.5°F (0.3°C)	79th Coolest	Coolest since: 1929	1904
	52.1°F (11.2°C)	51.6°F (10.9°C)	0.5°F (0.3°C)	49th Warmest	Warmest since: 1925	2012
	Ties: 1900, 1952, 2011
Apr 1929–Sep 1930 18-Month	56.6°F (13.7°C)	56.7°F (13.7°C)	-0.1°F (0.0°C)	53rd Coolest	Coolest since: 1929	1904, 1918
	56.6°F (13.7°C)	56.7°F (13.7°C)	-0.1°F (0.0°C)	75th Warmest	Warmest since: 1925	2012
	Ties: 1925, 1943, 1966, 1971, 1973, 1985
Oct 1928–Sep 1930 24-Month	51.5°F (10.8°C)	51.6°F (10.9°C)	-0.1°F (-0.1°C)	49th Coolest	Coolest since: 1929	1979
	51.5°F (10.8°C)	51.6°F (10.9°C)	-0.1°F (-0.1°C)	78th Warmest	Warmest since: 1923	2017
	Ties: 1993
Oct 1927–Sep 1930 36-Month	51.4°F (10.8°C)	51.6°F (10.9°C)	-0.2°F (-0.1°C)	46th Coolest	Coolest since: 1929	1979
	51.4°F (10.8°C)	51.6°F (10.9°C)	-0.2°F (-0.1°C)	80th Warmest	Warmest since: 1925	2018
	Ties: 1924, 1958, 1965
Oct 1926–Sep 1930 48-Month	51.3°F (10.7°C)	51.6°F (10.9°C)	-0.3°F (-0.2°C)	34th Coolest	Coolest since: 1929	1905
	51.3°F (10.7°C)	51.6°F (10.9°C)	-0.3°F (-0.2°C)	91st Warmest	Warmest since: 1928	2019
	Ties: 1900, 1903, 1909, 1928, 1951, 1960, 1964, 1965, 1984
Oct 1925–Sep 1930 60-Month	51.0°F (10.6°C)	51.6°F (10.9°C)	-0.6°F (-0.3°C)	18th Coolest	Coolest since: 1928	1906
	51.0°F (10.6°C)	51.6°F (10.9°C)	-0.6°F (-0.3°C)	106th Warmest	Warmest since: 1929	2020
	Ties: 1902, 1927, 1928, 1969

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on January 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings