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 1939

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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
October 1939 1-Month	56.5°F (13.6°C)	54.6°F (12.6°C)	1.9°F (1.0°C)	94th Coolest	Coolest since: 1937	1925
	56.5°F (13.6°C)	54.6°F (12.6°C)	1.9°F (1.0°C)	35th Warmest	Warmest since: 1938	1963
	Ties: 2010
Sep–Oct 1939 2-Month	63.9°F (17.7°C)	60.5°F (15.8°C)	3.4°F (1.9°C)	119th Coolest	Coolest since: 1938	1917
	63.9°F (17.7°C)	60.5°F (15.8°C)	3.4°F (1.9°C)	10th Warmest	Warmest since: 1931	1897
	Ties: 1920
Aug–Oct 1939 3-Month	66.7°F (19.3°C)	64.8°F (18.2°C)	1.9°F (1.1°C)	111th Coolest	Coolest since: 1937	1917
	66.7°F (19.3°C)	64.8°F (18.2°C)	1.9°F (1.1°C)	18th Warmest	Warmest since: 1938	1947
	Ties: 1922, 1953
Jul–Oct 1939 4-Month	69.0°F (20.6°C)	67.5°F (19.7°C)	1.5°F (0.9°C)	106th Coolest	Coolest since: 1937	1917
	69.0°F (20.6°C)	67.5°F (19.7°C)	1.5°F (0.9°C)	23rd Warmest	Warmest since: 1938	1936
	Ties: 1914
Jun–Oct 1939 5-Month	69.7°F (20.9°C)	68.2°F (20.1°C)	1.5°F (0.8°C)	103rd Coolest	Coolest since: 1937	1917
	69.7°F (20.9°C)	68.2°F (20.1°C)	1.5°F (0.8°C)	26th Warmest	Warmest since: 1938	1936
	Ties: 1963, 2002
May–Oct 1939 6-Month	69.0°F (20.6°C)	67.2°F (19.6°C)	1.8°F (1.0°C)	112th Coolest	Coolest since: 1938	1917
	69.0°F (20.6°C)	67.2°F (19.6°C)	1.8°F (1.0°C)	17th Warmest	Warmest since: 1936	1936
	Ties: 2005
Apr–Oct 1939 7-Month	66.0°F (18.9°C)	65.0°F (18.3°C)	1.0°F (0.6°C)	98th Coolest	Coolest since: 1937	1917
	66.0°F (18.9°C)	65.0°F (18.3°C)	1.0°F (0.6°C)	31st Warmest	Warmest since: 1938	2010
	Ties: 1911, 1944, 1988
Mar–Oct 1939 8-Month	63.0°F (17.2°C)	61.8°F (16.6°C)	1.2°F (0.6°C)	101st Coolest	Coolest since: 1937	1917
	63.0°F (17.2°C)	61.8°F (16.6°C)	1.2°F (0.6°C)	28th Warmest	Warmest since: 1938	2012
	Ties: 2018
Feb–Oct 1939 9-Month	59.2°F (15.1°C)	58.2°F (14.6°C)	1.0°F (0.5°C)	95th Coolest	Coolest since: 1937	1917
	59.2°F (15.1°C)	58.2°F (14.6°C)	1.0°F (0.5°C)	34th Warmest	Warmest since: 1938	2012
	Ties: 1925, 1936
Jan–Oct 1939 10-Month	56.5°F (13.6°C)	54.9°F (12.7°C)	1.6°F (0.9°C)	107th Coolest	Coolest since: 1937	1904
	56.5°F (13.6°C)	54.9°F (12.7°C)	1.6°F (0.9°C)	22nd Warmest	Warmest since: 1938	2012
	Ties: 1911, 1955, 1973
Dec 1938–Oct 1939 11-Month	54.1°F (12.3°C)	52.6°F (11.4°C)	1.5°F (0.9°C)	102nd Coolest	Coolest since: 1937	1904
	54.1°F (12.3°C)	52.6°F (11.4°C)	1.5°F (0.9°C)	26th Warmest	Warmest since: 1938	2012
	Ties: 1922, 2020
Nov 1938–Oct 1939 12-Month	53.2°F (11.8°C)	51.6°F (10.9°C)	1.6°F (0.9°C)	104th Coolest	Coolest since: 1937	1904
	53.2°F (11.8°C)	51.6°F (10.9°C)	1.6°F (0.9°C)	24th Warmest	Warmest since: 1938	2012
	Ties: 1955, 2006
May 1938–Oct 1939 18-Month	58.3°F (14.6°C)	56.8°F (13.8°C)	1.5°F (0.8°C)	112th Coolest	Coolest since: 1938	1904
	58.3°F (14.6°C)	56.8°F (13.8°C)	1.5°F (0.8°C)	16th Warmest	Warmest since: 1934	2012
	Ties: 1914, 1955, 1991
Nov 1937–Oct 1939 24-Month	53.2°F (11.8°C)	51.6°F (10.9°C)	1.6°F (0.9°C)	111th Coolest	Coolest since: 1938	1905
	53.2°F (11.8°C)	51.6°F (10.9°C)	1.6°F (0.9°C)	16th Warmest	Warmest since: 1933	2017
	Ties: 2021, 2022
Nov 1936–Oct 1939 36-Month	52.5°F (11.4°C)	51.6°F (10.9°C)	0.9°F (0.5°C)	96th Coolest	Coolest since: 1938	1904, 1979
	52.5°F (11.4°C)	51.6°F (10.9°C)	0.9°F (0.5°C)	30th Warmest	Warmest since: 1935	2018
	Ties: 1989, 2014
Nov 1935–Oct 1939 48-Month	52.2°F (11.2°C)	51.6°F (10.9°C)	0.6°F (0.3°C)	86th Coolest	Coolest since: 1938	1905
	52.2°F (11.2°C)	51.6°F (10.9°C)	0.6°F (0.3°C)	39th Warmest	Warmest since: 1936	2019
	Ties: 1923, 1944, 2015
Nov 1934–Oct 1939 60-Month	52.2°F (11.2°C)	51.6°F (10.9°C)	0.6°F (0.3°C)	84th Coolest	Coolest since: 1938	1905, 1906
	52.2°F (11.2°C)	51.6°F (10.9°C)	0.6°F (0.3°C)	40th Warmest	Warmest since: 1938	2002, 2020
	Ties: 1922, 1925, 1938, 1941, 1995

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings