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, October 1940

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
October 1940 1-Month	58.6°F (14.8°C)	54.6°F (12.6°C)	4.0°F (2.2°C)	114th Coolest	Coolest since: 1939	1925
October 1940 1-Month	58.6°F (14.8°C)	54.6°F (12.6°C)	4.0°F (2.2°C)	15th Warmest	Warmest since: 1938	1963
Sep–Oct 1940 2-Month	62.0°F (16.7°C)	60.4°F (15.8°C)	1.6°F (0.9°C)	97th Coolest	Coolest since: 1937	1917
Sep–Oct 1940 2-Month	62.0°F (16.7°C)	60.4°F (15.8°C)	1.6°F (0.9°C)	32nd Warmest	Warmest since: 1939	1897, 2016
Aug–Oct 1940 3-Month	66.0°F (18.9°C)	64.7°F (18.2°C)	1.3°F (0.7°C)	98th Coolest	Coolest since: 1937	1917
	66.0°F (18.9°C)	64.7°F (18.2°C)	1.3°F (0.7°C)	31st Warmest	Warmest since: 1939	1947
	Ties: 1906, 2019
Jul–Oct 1940 4-Month	68.6°F (20.3°C)	67.5°F (19.7°C)	1.1°F (0.6°C)	100th Coolest	Coolest since: 1937	1917
	68.6°F (20.3°C)	67.5°F (19.7°C)	1.1°F (0.6°C)	29th Warmest	Warmest since: 1939	1936
	Ties: 1922, 1930, 1933, 2002, 2018
Jun–Oct 1940 5-Month	69.3°F (20.7°C)	68.2°F (20.1°C)	1.1°F (0.6°C)	95th Coolest	Coolest since: 1937	1917
	69.3°F (20.7°C)	68.2°F (20.1°C)	1.1°F (0.6°C)	34th Warmest	Warmest since: 1939	1936
	Ties: 2011, 2019
May–Oct 1940 6-Month	67.6°F (19.8°C)	67.3°F (19.6°C)	0.3°F (0.2°C)	73rd Coolest	Coolest since: 1937	1917
	67.6°F (19.8°C)	67.3°F (19.6°C)	0.3°F (0.2°C)	56th Warmest	Warmest since: 1939	1936
	Ties: 1964
Apr–Oct 1940 7-Month	65.0°F (18.3°C)	65.0°F (18.3°C)	0.0°F (0.0°C)	58th Coolest	Coolest since: 1937	1917
	65.0°F (18.3°C)	65.0°F (18.3°C)	0.0°F (0.0°C)	71st Warmest	Warmest since: 1939	2010
	Ties: 1908, 1952
Mar–Oct 1940 8-Month	61.4°F (16.3°C)	61.8°F (16.6°C)	-0.4°F (-0.3°C)	42nd Coolest	Coolest since: 1937	1917
	61.4°F (16.3°C)	61.8°F (16.6°C)	-0.4°F (-0.3°C)	87th Warmest	Warmest since: 1939	2012
	Ties: 1903, 1916, 1920, 1927, 1957
Feb–Oct 1940 9-Month	57.8°F (14.3°C)	58.2°F (14.6°C)	-0.4°F (-0.3°C)	44th Coolest	Coolest since: 1937	1917
	57.8°F (14.3°C)	58.2°F (14.6°C)	-0.4°F (-0.3°C)	85th Warmest	Warmest since: 1939	2012
	Ties: 1901, 1968, 1974, 1992, 2009
Jan–Oct 1940 10-Month	53.4°F (11.9°C)	54.9°F (12.7°C)	-1.5°F (-0.8°C)	12th Coolest	Coolest since: 1929	1904
	53.4°F (11.9°C)	54.9°F (12.7°C)	-1.5°F (-0.8°C)	117th Warmest	Warmest since: 1939	2012
	Ties: 1902, 1929, 1966
Dec 1939–Oct 1940 11-Month	51.6°F (10.9°C)	52.6°F (11.4°C)	-1.0°F (-0.5°C)	20th Coolest	Coolest since: 1929	1904
	51.6°F (10.9°C)	52.6°F (11.4°C)	-1.0°F (-0.5°C)	108th Warmest	Warmest since: 1939	2012
	Ties: 1926, 1945, 1967, 1969, 2009
Nov 1939–Oct 1940 12-Month	50.6°F (10.3°C)	51.6°F (10.9°C)	-1.0°F (-0.6°C)	22nd Coolest	Coolest since: 1929	1904
	50.6°F (10.3°C)	51.6°F (10.9°C)	-1.0°F (-0.6°C)	106th Warmest	Warmest since: 1939	2012
	Ties: 1929, 1977
May 1939–Oct 1940 18-Month	56.7°F (13.7°C)	56.8°F (13.8°C)	-0.1°F (-0.1°C)	54th Coolest	Coolest since: 1936	1904
	56.7°F (13.7°C)	56.8°F (13.8°C)	-0.1°F (-0.1°C)	74th Warmest	Warmest since: 1939	2012
	Ties: 1963, 1965, 2003
Nov 1938–Oct 1940 24-Month	51.9°F (11.1°C)	51.6°F (10.9°C)	0.3°F (0.2°C)	77th Coolest	Coolest since: 1937	1905
	51.9°F (11.1°C)	51.6°F (10.9°C)	0.3°F (0.2°C)	50th Warmest	Warmest since: 1939	2017
	Ties: 1897, 1901, 1943, 1949, 2004
Nov 1937–Oct 1940 36-Month	52.4°F (11.3°C)	51.6°F (10.9°C)	0.8°F (0.4°C)	93rd Coolest	Coolest since: 1938	1904, 1979
	52.4°F (11.3°C)	51.6°F (10.9°C)	0.8°F (0.4°C)	33rd Warmest	Warmest since: 1939	2018
	Ties: 1987, 2020
Nov 1936–Oct 1940 48-Month	52.1°F (11.2°C)	51.6°F (10.9°C)	0.5°F (0.3°C)	82nd Coolest	Coolest since: 1938	1905
	52.1°F (11.2°C)	51.6°F (10.9°C)	0.5°F (0.3°C)	43rd Warmest	Warmest since: 1939	2019
	Ties: 1921, 1949, 1954, 1999, 2016
Nov 1935–Oct 1940 60-Month	51.9°F (11.1°C)	51.6°F (10.9°C)	0.3°F (0.2°C)	69th Coolest	Coolest since: 1931	1905, 1906
	51.9°F (11.1°C)	51.6°F (10.9°C)	0.3°F (0.2°C)	55th Warmest	Warmest since: 1939	2002, 2020
	Ties: 1924, 1944, 1946, 1949

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings