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 8. Southwest

Average Temperature Rankings, June 2021

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
June 2021 1-Month	76.0°F (24.4°C)	73.9°F (23.3°C)	2.1°F (1.1°C)	98th Coolest	Coolest since: 2020	1903
June 2021 1-Month	76.0°F (24.4°C)	73.9°F (23.3°C)	2.1°F (1.1°C)	31st Warmest	Warmest since: 2018	1952
May–Jun 2021 2-Month	69.9°F (21.1°C)	69.5°F (20.8°C)	0.4°F (0.3°C)	73rd Coolest	Coolest since: 2020	1907
	69.9°F (21.1°C)	69.5°F (20.8°C)	0.4°F (0.3°C)	56th Warmest	Warmest since: 2019	2018
	Ties: 1895, 1970, 2001
Apr–Jun 2021 3-Month	65.1°F (18.4°C)	64.8°F (18.2°C)	0.3°F (0.2°C)	62nd Coolest	Coolest since: 2020	1907
	65.1°F (18.4°C)	64.8°F (18.2°C)	0.3°F (0.2°C)	67th Warmest	Warmest since: 2019	2010
	Ties: 1938
Mar–Jun 2021 4-Month	61.6°F (16.4°C)	59.8°F (15.4°C)	1.8°F (1.0°C)	111th Coolest	Coolest since: 2020	1960
	61.6°F (16.4°C)	59.8°F (15.4°C)	1.8°F (1.0°C)	18th Warmest	Warmest since: 2017	2012
	Ties: 1911, 1922, 1953, 1963, 1964, 2022
Feb–Jun 2021 5-Month	54.6°F (12.6°C)	54.8°F (12.7°C)	-0.2°F (-0.1°C)	56th Coolest	Coolest since: 2015	1912, 1960, 1978
	54.6°F (12.6°C)	54.8°F (12.7°C)	-0.2°F (-0.1°C)	73rd Warmest	Warmest since: 2020	2012
	Ties: 1909, 1965
Jan–Jun 2021 6-Month	51.2°F (10.7°C)	50.8°F (10.4°C)	0.4°F (0.3°C)	71st Coolest	Coolest since: 2015	1912, 1978
	51.2°F (10.7°C)	50.8°F (10.4°C)	0.4°F (0.3°C)	58th Warmest	Warmest since: 2020	2012
	Ties: 1942, 1943, 1950, 1956, 1995
Dec 2020–Jun 2021 7-Month	49.2°F (9.6°C)	48.5°F (9.2°C)	0.7°F (0.4°C)	75th Coolest	Coolest since: 2015	1978
	49.2°F (9.6°C)	48.5°F (9.2°C)	0.7°F (0.4°C)	53rd Warmest	Warmest since: 2020	2012
	Ties: 1974, 1990
Nov 2020–Jun 2021 8-Month	49.3°F (9.6°C)	48.0°F (8.9°C)	1.3°F (0.7°C)	94th Coolest	Coolest since: 2019	1912
	49.3°F (9.6°C)	48.0°F (8.9°C)	1.3°F (0.7°C)	34th Warmest	Warmest since: 2020	2012
	Ties: 1949
Oct 2020–Jun 2021 9-Month	50.0°F (10.0°C)	49.1°F (9.5°C)	0.9°F (0.5°C)	88th Coolest	Coolest since: 2019	1912, 1978
	50.0°F (10.0°C)	49.1°F (9.5°C)	0.9°F (0.5°C)	40th Warmest	Warmest since: 2020	2012
	Ties: 1898, 1911, 1938, 1955, 2010
Sep 2020–Jun 2021 10-Month	51.9°F (11.1°C)	51.1°F (10.6°C)	0.8°F (0.5°C)	87th Coolest	Coolest since: 2015	1978
	51.9°F (11.1°C)	51.1°F (10.6°C)	0.8°F (0.5°C)	41st Warmest	Warmest since: 2020	2012
	Ties: 2008, 2010
Aug 2020–Jun 2021 11-Month	53.9°F (12.2°C)	53.3°F (11.8°C)	0.6°F (0.4°C)	77th Coolest	Coolest since: 2015	1904, 1978
	53.9°F (12.2°C)	53.3°F (11.8°C)	0.6°F (0.4°C)	51st Warmest	Warmest since: 2020	2012
	Ties: 1923, 1931, 1933, 1935, 1952, 2010
Jul 2020–Jun 2021 12-Month	56.1°F (13.4°C)	55.4°F (13.0°C)	0.7°F (0.4°C)	83rd Coolest	Coolest since: 2015	1904, 1912, 1918, 1978
	56.1°F (13.4°C)	55.4°F (13.0°C)	0.7°F (0.4°C)	45th Warmest	Warmest since: 2020	2012
	Ties: 1933, 1976
Jan 2020–Jun 2021 18-Month	54.9°F (12.7°C)	53.8°F (12.1°C)	1.1°F (0.6°C)	100th Coolest	Coolest since: 2019	1979
	54.9°F (12.7°C)	53.8°F (12.1°C)	1.1°F (0.6°C)	28th Warmest	Warmest since: 2020	2017
	Ties: 1935, 1974, 1988
Jul 2019–Jun 2021 24-Month	56.5°F (13.6°C)	55.4°F (13.0°C)	1.1°F (0.6°C)	105th Coolest	Coolest since: 2019	1978, 1979
	56.5°F (13.6°C)	55.4°F (13.0°C)	1.1°F (0.6°C)	22nd Warmest	Warmest since: 2020	2017
	Ties: 1934, 1987, 2016
Jul 2018–Jun 2021 36-Month	56.4°F (13.6°C)	55.3°F (12.9°C)	1.1°F (0.7°C)	101st Coolest	Coolest since: 2016	1979
	56.4°F (13.6°C)	55.3°F (12.9°C)	1.1°F (0.7°C)	25th Warmest	Warmest since: 2020	2018
	Ties: 1957, 2004
Jul 2017–Jun 2021 48-Month	56.4°F (13.6°C)	55.3°F (12.9°C)	1.1°F (0.7°C)	103rd Coolest	Coolest since: 2016	1980
	56.4°F (13.6°C)	55.3°F (12.9°C)	1.1°F (0.7°C)	22nd Warmest	Warmest since: 2020	2019
	Ties: 2005
Jul 2016–Jun 2021 60-Month	57.0°F (13.9°C)	55.4°F (13.0°C)	1.6°F (0.9°C)	122nd Coolest	Coolest since: 2019	1980
	57.0°F (13.9°C)	55.4°F (13.0°C)	1.6°F (0.9°C)	2nd Warmest	Warmest since: 2020	2020
	Ties: 1935, 2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published January 2023, retrieved on January 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings