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 5. East

Average Temperature Rankings, August 2021

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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
August 2021 1-Month	74.8°F (23.8°C)	72.1°F (22.3°C)	2.7°F (1.5°C)	111th Coolest	Coolest since: 2020	1915
August 2021 1-Month	74.8°F (23.8°C)	72.1°F (22.3°C)	2.7°F (1.5°C)	18th Warmest	Warmest since: 2016	1947
Jul–Aug 2021 2-Month	74.1°F (23.4°C)	73.3°F (22.9°C)	0.8°F (0.5°C)	90th Coolest	Coolest since: 2020	1915
	74.1°F (23.4°C)	73.3°F (22.9°C)	0.8°F (0.5°C)	39th Warmest	Warmest since: 2019	1936
	Ties: 1953, 2007, 2019
Jun–Aug 2021 3-Month	73.8°F (23.2°C)	72.3°F (22.4°C)	1.5°F (0.8°C)	100th Coolest	Coolest since: 2020	1915
	73.8°F (23.2°C)	72.3°F (22.4°C)	1.5°F (0.8°C)	29th Warmest	Warmest since: 2018	1936
	Ties: 1955, 2018
May–Aug 2021 4-Month	70.4°F (21.3°C)	69.5°F (20.8°C)	0.9°F (0.5°C)	87th Coolest	Coolest since: 2020	1915
	70.4°F (21.3°C)	69.5°F (20.8°C)	0.9°F (0.5°C)	42nd Warmest	Warmest since: 2018	1934
	Ties: 1931, 1939, 1962
Apr–Aug 2021 5-Month	66.7°F (19.3°C)	65.5°F (18.6°C)	1.2°F (0.7°C)	95th Coolest	Coolest since: 2020	1907
	66.7°F (19.3°C)	65.5°F (18.6°C)	1.2°F (0.7°C)	34th Warmest	Warmest since: 2018	1991
	Ties: 1911, 1925, 1980
Mar–Aug 2021 6-Month	63.0°F (17.2°C)	61.0°F (16.1°C)	2.0°F (1.1°C)	116th Coolest	Coolest since: 2020	1904
Mar–Aug 2021 6-Month	63.0°F (17.2°C)	61.0°F (16.1°C)	2.0°F (1.1°C)	13th Warmest	Warmest since: 2016	2012
Feb–Aug 2021 7-Month	56.7°F (13.7°C)	56.2°F (13.4°C)	0.5°F (0.3°C)	76th Coolest	Coolest since: 2019	1904
	56.7°F (13.7°C)	56.2°F (13.4°C)	0.5°F (0.3°C)	53rd Warmest	Warmest since: 2020	2012
	Ties: 1936, 1974, 1985
Jan–Aug 2021 8-Month	53.2°F (11.8°C)	52.2°F (11.2°C)	1.0°F (0.6°C)	87th Coolest	Coolest since: 2019	1904, 1912
	53.2°F (11.8°C)	52.2°F (11.2°C)	1.0°F (0.6°C)	42nd Warmest	Warmest since: 2020	2012
	Ties: 1939
Dec 2020–Aug 2021 9-Month	50.9°F (10.5°C)	49.5°F (9.7°C)	1.4°F (0.8°C)	97th Coolest	Coolest since: 2019	1904
	50.9°F (10.5°C)	49.5°F (9.7°C)	1.4°F (0.8°C)	31st Warmest	Warmest since: 2020	2012
	Ties: 1952
Nov 2020–Aug 2021 10-Month	50.4°F (10.2°C)	48.5°F (9.2°C)	1.9°F (1.0°C)	106th Coolest	Coolest since: 2020	1904
	50.4°F (10.2°C)	48.5°F (9.2°C)	1.9°F (1.0°C)	22nd Warmest	Warmest since: 2017	2012
	Ties: 1919
Oct 2020–Aug 2021 11-Month	50.4°F (10.2°C)	49.0°F (9.4°C)	1.4°F (0.8°C)	102nd Coolest	Coolest since: 2020	1904
	50.4°F (10.2°C)	49.0°F (9.4°C)	1.4°F (0.8°C)	26th Warmest	Warmest since: 2020	2012
	Ties: 1988, 2020
Sep 2020–Aug 2021 12-Month	51.7°F (10.9°C)	50.3°F (10.2°C)	1.4°F (0.7°C)	103rd Coolest	Coolest since: 2019	1904
	51.7°F (10.9°C)	50.3°F (10.2°C)	1.4°F (0.7°C)	25th Warmest	Warmest since: 2020	2012
	Ties: 1939, 1953, 1988
Mar 2020–Aug 2021 18-Month	55.0°F (12.8°C)	53.9°F (12.2°C)	1.1°F (0.6°C)	96th Coolest	Coolest since: 2019	1904
	55.0°F (12.8°C)	53.9°F (12.2°C)	1.1°F (0.6°C)	32nd Warmest	Warmest since: 2020	2012
	Ties: 1953
Sep 2019–Aug 2021 24-Month	51.9°F (11.1°C)	50.3°F (10.2°C)	1.6°F (0.9°C)	108th Coolest	Coolest since: 2020	1905
	51.9°F (11.1°C)	50.3°F (10.2°C)	1.6°F (0.9°C)	19th Warmest	Warmest since: 2018	2017
	Ties: 2022
Sep 2018–Aug 2021 36-Month	51.5°F (10.8°C)	50.3°F (10.2°C)	1.2°F (0.6°C)	100th Coolest	Coolest since: 2020	1904
	51.5°F (10.8°C)	50.3°F (10.2°C)	1.2°F (0.6°C)	26th Warmest	Warmest since: 2020	2018
	Ties: 1991, 2020
Sep 2017–Aug 2021 48-Month	51.5°F (10.8°C)	50.3°F (10.2°C)	1.2°F (0.6°C)	104th Coolest	Coolest since: 2017	1905
	51.5°F (10.8°C)	50.3°F (10.2°C)	1.2°F (0.6°C)	21st Warmest	Warmest since: 2020	2019
	Ties: 1989, 1991, 2003, 2017
Sep 2016–Aug 2021 60-Month	52.1°F (11.2°C)	50.3°F (10.2°C)	1.8°F (1.0°C)	121st Coolest	Coolest since: 2019	1906
Sep 2016–Aug 2021 60-Month	52.1°F (11.2°C)	50.3°F (10.2°C)	1.8°F (1.0°C)	3rd Warmest	Warmest since: 2020	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published May 2023, retrieved on June 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings