Climate at a Glance | Statewide Rankings | National Centers for Environmental Information (NCEI)

Statewide Rankings

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Illinois

January 1951 Average Temperature Rankings

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Coolest/Warmest Since	Record
January 1951 1-Month	26.3°F (-3.2°C)	25.3°F (-3.7°C)	1.0°F	67th Coolest	Coolest since: 1948	1977
January 1951 1-Month	26.3°F (-3.2°C)	25.3°F (-3.7°C)	1.0°F	65th Warmest	Warmest since: 1950	2006
Dec 1950–Jan 1951 2-Month	23.9°F (-4.5°C)	27.5°F (-2.5°C)	-3.6°F	24th Coolest	Coolest since: 1945	1918
Dec 1950–Jan 1951 2-Month	23.9°F (-4.5°C)	27.5°F (-2.5°C)	-3.6°F	107th Warmest	Warmest since: 1950	1932
Nov 1950–Jan 1951 3-Month	27.5°F (-2.5°C)	31.9°F (-0.1°C)	-4.4°F	8th Coolest	Coolest since: 1936	1977
Nov 1950–Jan 1951 3-Month	27.5°F (-2.5°C)	31.9°F (-0.1°C)	-4.4°F	123rd Warmest	Warmest since: 1950	1932
Oct 1950–Jan 1951 4-Month	35.4°F (1.9°C)	37.6°F (3.1°C)	-2.2°F	19th Coolest	Coolest since: 1936	1977
Oct 1950–Jan 1951 4-Month	35.4°F (1.9°C)	37.6°F (3.1°C)	-2.2°F	112th Warmest	Warmest since: 1950	1932
Sep 1950–Jan 1951 5-Month	41.2°F (5.1°C)	43.3°F (6.3°C)	-2.1°F	12th Coolest	Coolest since: 1936	1977
Sep 1950–Jan 1951 5-Month	41.2°F (5.1°C)	43.3°F (6.3°C)	-2.1°F	119th Warmest	Warmest since: 1950	1932
Aug 1950–Jan 1951 6-Month	45.9°F (7.7°C)	48.4°F (9.1°C)	-2.5°F	7th Coolest	Coolest since: 1930	1977
	45.9°F (7.7°C)	48.4°F (9.1°C)	-2.5°F	124th Warmest	Warmest since: 1950	1932
	Ties: 1912
Jul 1950–Jan 1951 7-Month	49.6°F (9.8°C)	52.2°F (11.2°C)	-2.6°F	4th Coolest	Coolest since: 1918	1977
Jul 1950–Jan 1951 7-Month	49.6°F (9.8°C)	52.2°F (11.2°C)	-2.6°F	127th Warmest	Warmest since: 1950	1932
Jun 1950–Jan 1951 8-Month	52.2°F (11.2°C)	54.6°F (12.6°C)	-2.4°F	4th Coolest	Coolest since: 1930	1918, 1977
	52.2°F (11.2°C)	54.6°F (12.6°C)	-2.4°F	127th Warmest	Warmest since: 1950	1932
	Ties: 1930
May 1950–Jan 1951 9-Month	53.4°F (11.9°C)	55.5°F (13.1°C)	-2.1°F	8th Coolest	Coolest since: 1936	1918
	53.4°F (11.9°C)	55.5°F (13.1°C)	-2.1°F	123rd Warmest	Warmest since: 1950	1932
	Ties: 1905
Apr 1950–Jan 1951 10-Month	52.7°F (11.5°C)	55.1°F (12.8°C)	-2.4°F	5th Coolest	Coolest since: 1918	1918
Apr 1950–Jan 1951 10-Month	52.7°F (11.5°C)	55.1°F (12.8°C)	-2.4°F	126th Warmest	Warmest since: 1950	1932
Mar 1950–Jan 1951 11-Month	51.2°F (10.7°C)	53.7°F (12.1°C)	-2.5°F	3rd Coolest	Coolest since: 1918	1918
Mar 1950–Jan 1951 11-Month	51.2°F (10.7°C)	53.7°F (12.1°C)	-2.5°F	128th Warmest	Warmest since: 1950	2013
Feb 1950–Jan 1951 12-Month	49.4°F (9.7°C)	51.6°F (10.9°C)	-2.2°F	5th Coolest	Coolest since: 1918	1918
Feb 1950–Jan 1951 12-Month	49.4°F (9.7°C)	51.6°F (10.9°C)	-2.2°F	126th Warmest	Warmest since: 1950	2013
Aug 1949–Jan 1951 18-Month	49.6°F (9.8°C)	50.5°F (10.3°C)	-0.9°F	23rd Coolest	Coolest since: 1930	1905, 1918
Aug 1949–Jan 1951 18-Month	49.6°F (9.8°C)	50.5°F (10.3°C)	-0.9°F	107th Warmest	Warmest since: 1950	2017
Feb 1949–Jan 1951 24-Month	51.2°F (10.7°C)	51.6°F (10.9°C)	-0.4°F	35th Coolest	Coolest since: 1930	1918
Feb 1949–Jan 1951 24-Month	51.2°F (10.7°C)	51.6°F (10.9°C)	-0.4°F	95th Warmest	Warmest since: 1950	2013
Feb 1948–Jan 1951 36-Month	51.6°F (10.9°C)	51.6°F (10.9°C)	0.0°F	60th Coolest	Coolest since: 1946	1905
Feb 1948–Jan 1951 36-Month	51.6°F (10.9°C)	51.6°F (10.9°C)	0.0°F	69th Warmest	Warmest since: 1950	2013
Feb 1947–Jan 1951 48-Month	51.3°F (10.7°C)	51.6°F (10.9°C)	-0.3°F	35th Coolest	Coolest since: 1930	1905
Feb 1947–Jan 1951 48-Month	51.3°F (10.7°C)	51.6°F (10.9°C)	-0.3°F	93rd Warmest	Warmest since: 1950	2025
Feb 1946–Jan 1951 60-Month	51.8°F (11.0°C)	51.6°F (10.9°C)	0.2°F	58th Coolest	Coolest since: 1948	1906
Feb 1946–Jan 1951 60-Month	51.8°F (11.0°C)	51.6°F (10.9°C)	0.2°F	69th Warmest	Warmest since: 1950	2025

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on April 1, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings

Climate at a Glance Statewide Rankings

Statewide Rankings

Illinois

January 1951 Average Temperature Rankings

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