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

Statewide Rankings

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Illinois

February 1979 Average Temperature Rankings

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Coolest/Warmest Since	Record
February 1979 1-Month	17.4°F (-8.1°C)	29.2°F (-1.6°C)	-11.8°F	3rd Coolest	Coolest since: 1978	1978
February 1979 1-Month	17.4°F (-8.1°C)	29.2°F (-1.6°C)	-11.8°F	129th Warmest	Warmest since: 1977	2017
Jan–Feb 1979 2-Month	15.1°F (-9.4°C)	27.3°F (-2.6°C)	-12.2°F	1st Coolest	Coolest to Date	1979
Jan–Feb 1979 2-Month	15.1°F (-9.4°C)	27.3°F (-2.6°C)	-12.2°F	131st Warmest	Warmest since: 1978	2017
Dec 1978–Feb 1979 3-Month	19.7°F (-6.8°C)	28.0°F (-2.2°C)	-8.3°F	2nd Coolest	Coolest since: 1978	1978
Dec 1978–Feb 1979 3-Month	19.7°F (-6.8°C)	28.0°F (-2.2°C)	-8.3°F	129th Warmest	Warmest since: 1977	1932
Nov 1978–Feb 1979 4-Month	25.6°F (-3.6°C)	31.2°F (-0.4°C)	-5.6°F	5th Coolest	Coolest since: 1978	1977
	25.6°F (-3.6°C)	31.2°F (-0.4°C)	-5.6°F	126th Warmest	Warmest since: 1976	1932
	Ties: 1918
Oct 1978–Feb 1979 5-Month	31.0°F (-0.6°C)	35.9°F (2.2°C)	-4.9°F	6th Coolest	Coolest since: 1978	1977
Oct 1978–Feb 1979 5-Month	31.0°F (-0.6°C)	35.9°F (2.2°C)	-4.9°F	125th Warmest	Warmest since: 1976	1932
Sep 1978–Feb 1979 6-Month	37.5°F (3.1°C)	41.0°F (5.0°C)	-3.5°F	7th Coolest	Coolest since: 1978	1977
Sep 1978–Feb 1979 6-Month	37.5°F (3.1°C)	41.0°F (5.0°C)	-3.5°F	124th Warmest	Warmest since: 1976	1932
Aug 1978–Feb 1979 7-Month	42.6°F (5.9°C)	45.6°F (7.6°C)	-3.0°F	8th Coolest	Coolest since: 1978	1977
	42.6°F (5.9°C)	45.6°F (7.6°C)	-3.0°F	123rd Warmest	Warmest since: 1976	1932
	Ties: 1899
Jul 1978–Feb 1979 8-Month	46.6°F (8.1°C)	49.4°F (9.7°C)	-2.8°F	7th Coolest	Coolest since: 1978	1977
Jul 1978–Feb 1979 8-Month	46.6°F (8.1°C)	49.4°F (9.7°C)	-2.8°F	124th Warmest	Warmest since: 1976	1932
Jun 1978–Feb 1979 9-Month	49.5°F (9.7°C)	51.8°F (11.0°C)	-2.3°F	9th Coolest	Coolest since: 1978	1977
Jun 1978–Feb 1979 9-Month	49.5°F (9.7°C)	51.8°F (11.0°C)	-2.3°F	122nd Warmest	Warmest since: 1976	1932
May 1978–Feb 1979 10-Month	50.6°F (10.3°C)	52.8°F (11.6°C)	-2.2°F	7th Coolest	Coolest since: 1977	1918
May 1978–Feb 1979 10-Month	50.6°F (10.3°C)	52.8°F (11.6°C)	-2.2°F	124th Warmest	Warmest since: 1978	1932
Apr 1978–Feb 1979 11-Month	50.8°F (10.4°C)	52.7°F (11.5°C)	-1.9°F	9th Coolest	Coolest since: 1977	1918
Apr 1978–Feb 1979 11-Month	50.8°F (10.4°C)	52.7°F (11.5°C)	-1.9°F	122nd Warmest	Warmest since: 1978	1932
Mar 1978–Feb 1979 12-Month	49.4°F (9.7°C)	51.6°F (10.9°C)	-2.2°F	6th Coolest	Coolest since: 1977	1918
Mar 1978–Feb 1979 12-Month	49.4°F (9.7°C)	51.6°F (10.9°C)	-2.2°F	125th Warmest	Warmest since: 1978	2017
Sep 1977–Feb 1979 18-Month	45.1°F (7.3°C)	48.1°F (8.9°C)	-3.0°F	3rd Coolest	Coolest since: 1918	1905
Sep 1977–Feb 1979 18-Month	45.1°F (7.3°C)	48.1°F (8.9°C)	-3.0°F	127th Warmest	Warmest since: 1978	2017
Mar 1977–Feb 1979 24-Month	50.2°F (10.1°C)	51.6°F (10.9°C)	-1.4°F	6th Coolest	Coolest since: 1978	1905
Mar 1977–Feb 1979 24-Month	50.2°F (10.1°C)	51.6°F (10.9°C)	-1.4°F	124th Warmest	Warmest since: 1977	2017
Mar 1976–Feb 1979 36-Month	49.6°F (9.8°C)	51.6°F (10.9°C)	-2.0°F	1st Coolest	Coolest to Date	1979
Mar 1976–Feb 1979 36-Month	49.6°F (9.8°C)	51.6°F (10.9°C)	-2.0°F	128th Warmest	Warmest since: 1978	2013, 2018
Mar 1975–Feb 1979 48-Month	50.3°F (10.2°C)	51.6°F (10.9°C)	-1.3°F	3rd Coolest	Coolest since: 1918	1905
	50.3°F (10.2°C)	51.6°F (10.9°C)	-1.3°F	125th Warmest	Warmest since: 1978	2025
	Ties: 1906, 1907, 1918
Mar 1974–Feb 1979 60-Month	50.6°F (10.3°C)	51.6°F (10.9°C)	-1.0°F	7th Coolest	Coolest since: 1920	1905
	50.6°F (10.3°C)	51.6°F (10.9°C)	-1.0°F	120th Warmest	Warmest since: 1978	2025
	Ties: 1920

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on March 19, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings

Climate at a Glance Statewide Rankings

Statewide Rankings

Illinois

February 1979 Average Temperature Rankings

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