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 3. West

Average Temperature Rankings, December 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
December 1939 1-Month	34.0°F (1.1°C)	28.3°F (-2.1°C)	5.7°F (3.2°C)	111th Coolest	Coolest since: 1938	1983
	34.0°F (1.1°C)	28.3°F (-2.1°C)	5.7°F (3.2°C)	18th Warmest	Warmest since: 1931	2015
	Ties: 1971
Nov–Dec 1939 2-Month	37.1°F (2.8°C)	34.3°F (1.3°C)	2.8°F (1.5°C)	101st Coolest	Coolest since: 1938	2000
	37.1°F (2.8°C)	34.3°F (1.3°C)	2.8°F (1.5°C)	28th Warmest	Warmest since: 1931	1931
	Ties: 1990, 2009
Oct–Dec 1939 3-Month	43.6°F (6.4°C)	41.0°F (5.0°C)	2.6°F (1.4°C)	105th Coolest	Coolest since: 1937	1976
Oct–Dec 1939 3-Month	43.6°F (6.4°C)	41.0°F (5.0°C)	2.6°F (1.4°C)	24th Warmest	Warmest since: 1938	1931
Sep–Dec 1939 4-Month	50.3°F (10.2°C)	47.3°F (8.5°C)	3.0°F (1.7°C)	119th Coolest	Coolest since: 1938	1976
	50.3°F (10.2°C)	47.3°F (8.5°C)	3.0°F (1.7°C)	10th Warmest	Warmest since: 1931	1931
	Ties: 1913
Aug–Dec 1939 5-Month	54.7°F (12.6°C)	52.5°F (11.4°C)	2.2°F (1.2°C)	113th Coolest	Coolest since: 1937	1976
Aug–Dec 1939 5-Month	54.7°F (12.6°C)	52.5°F (11.4°C)	2.2°F (1.2°C)	16th Warmest	Warmest since: 1938	1931
Jul–Dec 1939 6-Month	58.4°F (14.7°C)	56.5°F (13.6°C)	1.9°F (1.1°C)	114th Coolest	Coolest since: 1937	1976
Jul–Dec 1939 6-Month	58.4°F (14.7°C)	56.5°F (13.6°C)	1.9°F (1.1°C)	15th Warmest	Warmest since: 1938	1931
Jun–Dec 1939 7-Month	60.4°F (15.8°C)	58.6°F (14.8°C)	1.8°F (1.0°C)	111th Coolest	Coolest since: 1937	1976
Jun–Dec 1939 7-Month	60.4°F (15.8°C)	58.6°F (14.8°C)	1.8°F (1.0°C)	18th Warmest	Warmest since: 1938	1931
May–Dec 1939 8-Month	61.1°F (16.2°C)	59.1°F (15.1°C)	2.0°F (1.1°C)	118th Coolest	Coolest since: 1938	1917
	61.1°F (16.2°C)	59.1°F (15.1°C)	2.0°F (1.1°C)	11th Warmest	Warmest since: 1936	1931
	Ties: 1921, 1987, 2007
Apr–Dec 1939 9-Month	59.7°F (15.4°C)	58.2°F (14.6°C)	1.5°F (0.8°C)	106th Coolest	Coolest since: 1937	1917
	59.7°F (15.4°C)	58.2°F (14.6°C)	1.5°F (0.8°C)	23rd Warmest	Warmest since: 1938	1931
	Ties: 1922, 1999, 2011
Mar–Dec 1939 10-Month	57.9°F (14.4°C)	56.3°F (13.5°C)	1.6°F (0.9°C)	110th Coolest	Coolest since: 1937	1917
Mar–Dec 1939 10-Month	57.9°F (14.4°C)	56.3°F (13.5°C)	1.6°F (0.9°C)	19th Warmest	Warmest since: 1938	2012
Feb–Dec 1939 11-Month	55.1°F (12.8°C)	53.7°F (12.1°C)	1.4°F (0.7°C)	108th Coolest	Coolest since: 1937	1917
	55.1°F (12.8°C)	53.7°F (12.1°C)	1.4°F (0.7°C)	21st Warmest	Warmest since: 1938	2012
	Ties: 1936, 2006, 2007, 2010, 2011
Jan–Dec 1939 12-Month	53.2°F (11.8°C)	51.2°F (10.7°C)	2.0°F (1.1°C)	112th Coolest	Coolest since: 1937	1917
Jan–Dec 1939 12-Month	53.2°F (11.8°C)	51.2°F (10.7°C)	2.0°F (1.1°C)	17th Warmest	Warmest since: 1938	2012
Jul 1938–Dec 1939 18-Month	55.2°F (12.9°C)	53.0°F (11.7°C)	2.2°F (1.2°C)	122nd Coolest	Coolest since: 1938	1904
Jul 1938–Dec 1939 18-Month	55.2°F (12.9°C)	53.0°F (11.7°C)	2.2°F (1.2°C)	6th Warmest	Warmest since: 1931	2012
Jan 1938–Dec 1939 24-Month	53.6°F (12.0°C)	51.2°F (10.7°C)	2.4°F (1.3°C)	123rd Coolest	Coolest since: 1938	1979
	53.6°F (12.0°C)	51.2°F (10.7°C)	2.4°F (1.3°C)	5th Warmest	Warmest since: 1931	2017
	Ties: 2012
Jan 1937–Dec 1939 36-Month	52.4°F (11.3°C)	51.2°F (10.7°C)	1.2°F (0.6°C)	106th Coolest	Coolest since: 1938	1905
	52.4°F (11.3°C)	51.2°F (10.7°C)	1.2°F (0.6°C)	21st Warmest	Warmest since: 1935	2017
	Ties: 1921, 1992
Jan 1936–Dec 1939 48-Month	52.3°F (11.3°C)	51.2°F (10.7°C)	1.1°F (0.6°C)	107th Coolest	Coolest since: 1938	1905
	52.3°F (11.3°C)	51.2°F (10.7°C)	1.1°F (0.6°C)	19th Warmest	Warmest since: 1936	1934
	Ties: 1935, 1957, 2020
Jan 1935–Dec 1939 60-Month	52.0°F (11.1°C)	51.2°F (10.7°C)	0.8°F (0.4°C)	100th Coolest	Coolest since: 1938	1905
	52.0°F (11.1°C)	51.2°F (10.7°C)	0.8°F (0.4°C)	25th Warmest	Warmest since: 1938	1934
	Ties: 1931, 1932, 1938, 1955, 2004, 2012, 2013, 2016

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published June 2023, retrieved on June 9, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings