Divisional Rankings

Divisional Data Info
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 2020

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
August 2020
1-Month 		71.7°F
(22.1°C)		 72.1°F
(22.3°C)		 -0.4°F
(-0.2°C)		 51st Coolest
Coolest since:
 1915
78th Warmest
Warmest since:
 1947
Ties: 1978, 2013
Jul–Aug 2020
2-Month 		73.9°F
(23.3°C)		 73.2°F
(22.9°C)		 0.7°F
(0.4°C)		 86th Coolest
Coolest since:
 1915
43rd Warmest
Warmest since:
 1936
Ties: 1952, 1957, 1998, 1999, 2001
Jun–Aug 2020
3-Month 		73.6°F
(23.1°C)		 72.3°F
(22.4°C)		 1.3°F
(0.7°C)		 96th Coolest
Coolest since:
 1915
33rd Warmest
Warmest since:
 1936
Ties: 1930
May–Aug 2020
4-Month 		70.1°F
(21.2°C)		 69.5°F
(20.8°C)		 0.6°F
(0.4°C)		 78th Coolest
Coolest since:
 1915
51st Warmest
Warmest since:
 1934
Ties: 1899, 1986
Apr–Aug 2020
5-Month 		65.7°F
(18.7°C)		 65.6°F
(18.7°C)		 0.1°F
(0.0°C)		 60th Coolest
Coolest since:
 1907
69th Warmest
Warmest since:
 1991
Ties: 1901, 1956, 1965, 1975, 2000
Mar–Aug 2020
6-Month 		61.8°F
(16.6°C)		 61.0°F
(16.1°C)		 0.8°F
(0.5°C)		 84th Coolest
Coolest since:
 1904, 1907
45th Warmest
Warmest since:
 2012
Ties: 1952, 1983, 2004
Feb–Aug 2020
7-Month 		57.3°F
(14.1°C)		 56.2°F
(13.4°C)		 1.1°F
(0.7°C)		 91st Coolest
Coolest since:
 1904
38th Warmest
Warmest since:
 2012
Ties: 1896, 1931, 1957, 1990
Jan–Aug 2020
8-Month 		54.1°F
(12.3°C)		 52.2°F
(11.2°C)		 1.9°F
(1.1°C)		 112th Coolest
Coolest since:
 1904, 1912
17th Warmest
Warmest since:
 2012
Ties: 1932, 1955, 2000
Dec 2019–Aug 2020
9-Month 		51.8°F
(11.0°C)		 49.5°F
(9.7°C)		 2.3°F
(1.3°C)		 114th Coolest
Coolest since:
 1904
14th Warmest
Warmest since:
 2012
Ties: 1953, 1999
Nov 2019–Aug 2020
10-Month 		50.1°F
(10.1°C)		 48.5°F
(9.2°C)		 1.6°F
(0.9°C)		 102nd Coolest
Coolest since:
 1904
26th Warmest
Warmest since:
 2012
Ties: 1931, 1976
Oct 2019–Aug 2020
11-Month 		50.4°F
(10.2°C)		 48.9°F
(9.4°C)		 1.5°F
(0.8°C)		 102nd Coolest
Coolest since:
 1904
26th Warmest
Warmest since:
 2012
Ties: 1988, 2021
Sep 2019–Aug 2020
12-Month 		52.1°F
(11.2°C)		 50.3°F
(10.2°C)		 1.8°F
(1.0°C)		 109th Coolest
Coolest since:
 1904
19th Warmest
Warmest since:
 2012
Mar 2019–Aug 2020
18-Month 		55.1°F
(12.8°C)		 53.9°F
(12.2°C)		 1.2°F
(0.6°C)		 99th Coolest
Coolest since:
 1904
29th Warmest
Warmest since:
 2012
Ties: 1931, 1998
Sep 2018–Aug 2020
24-Month 		51.4°F
(10.8°C)		 50.3°F
(10.2°C)		 1.1°F
(0.6°C)		 100th Coolest
Coolest since:
 1905
27th Warmest
Warmest since:
 2017
Ties: 2001, 2008
Sep 2017–Aug 2020
36-Month 		51.5°F
(10.8°C)		 50.3°F
(10.2°C)		 1.2°F
(0.6°C)		 100th Coolest
Coolest since:
 1904
26th Warmest
Warmest since:
 2018
Ties: 1991, 2021
Sep 2016–Aug 2020
48-Month 		52.2°F
(11.2°C)		 50.3°F
(10.2°C)		 1.9°F
(1.0°C)		 122nd Coolest
Coolest since:
 1905
3rd Warmest
Warmest since:
 2019
Ties: 2001, 2002, 2007, 2013
Sep 2015–Aug 2020
60-Month 		52.6°F
(11.4°C)		 50.3°F
(10.2°C)		 2.3°F
(1.2°C)		 123rd Coolest
Coolest since:
 1906
1st Warmest
Warmest to Date
 2020

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