Statewide Rankings

Statewide 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

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 		72.8°F
(22.7°C)		 73.4°F
(23.0°C)		 -0.6°F
(-0.3°C)		 46th Coolest
Coolest since:
 1915
83rd Warmest
Warmest since:
 1947
Ties: 1961, 1989, 2013, 2019
Jul–Aug 2020
2-Month 		75.0°F
(23.9°C)		 74.4°F
(23.6°C)		 0.6°F
(0.3°C)		 82nd Coolest
Coolest since:
 1915
47th Warmest
Warmest since:
 1936
Ties: 1899, 1940, 2003
Jun–Aug 2020
3-Month 		74.6°F
(23.7°C)		 73.5°F
(23.1°C)		 1.1°F
(0.6°C)		 94th Coolest
Coolest since:
 1915
35th Warmest
Warmest since:
 1936
Ties: 1900, 1932
May–Aug 2020
4-Month 		71.1°F
(21.7°C)		 70.7°F
(21.5°C)		 0.4°F
(0.2°C)		 73rd Coolest
Coolest since:
 1915
56th Warmest
Warmest since:
 1934, 1936
Ties: 1986
Apr–Aug 2020
5-Month 		66.8°F
(19.3°C)		 66.8°F
(19.3°C)		 0.0°F
(0.0°C)		 56th Coolest
Coolest since:
 1907
73rd Warmest
Warmest since:
 1934
Mar–Aug 2020
6-Month 		63.0°F
(17.2°C)		 62.3°F
(16.8°C)		 0.7°F
(0.4°C)		 83rd Coolest
Coolest since:
 1904, 1950, 1960
46th Warmest
Warmest since:
 2012
Ties: 1952, 1963
Feb–Aug 2020
7-Month 		58.6°F
(14.8°C)		 57.6°F
(14.2°C)		 1.0°F
(0.6°C)		 90th Coolest
Coolest since:
 1904
39th Warmest
Warmest since:
 2012
Ties: 1949
Jan–Aug 2020
8-Month 		55.2°F
(12.9°C)		 53.5°F
(11.9°C)		 1.7°F
(1.0°C)		 105th Coolest
Coolest since:
 1904, 1912
24th Warmest
Warmest since:
 2012
Ties: 1999, 2007
Dec 2019–Aug 2020
9-Month 		53.1°F
(11.7°C)		 50.9°F
(10.5°C)		 2.2°F
(1.2°C)		 114th Coolest
Coolest since:
 1904
14th Warmest
Warmest since:
 2012
Ties: 1983, 2000
Nov 2019–Aug 2020
10-Month 		51.4°F
(10.8°C)		 49.9°F
(9.9°C)		 1.5°F
(0.9°C)		 102nd Coolest
Coolest since:
 1904
26th Warmest
Warmest since:
 2012
Ties: 1976, 2021
Oct 2019–Aug 2020
11-Month 		51.6°F
(10.9°C)		 50.3°F
(10.2°C)		 1.3°F
(0.7°C)		 100th Coolest
Coolest since:
 1904
28th Warmest
Warmest since:
 2012
Ties: 1941
Sep 2019–Aug 2020
12-Month 		53.3°F
(11.8°C)		 51.7°F
(10.9°C)		 1.6°F
(0.9°C)		 110th Coolest
Coolest since:
 1904
18th Warmest
Warmest since:
 2012
Ties: 1955, 1983
Mar 2019–Aug 2020
18-Month 		56.2°F
(13.4°C)		 55.1°F
(12.8°C)		 1.1°F
(0.6°C)		 96th Coolest
Coolest since:
 1904
32nd Warmest
Warmest since:
 2012
Ties: 1937, 1953, 1998
Sep 2018–Aug 2020
24-Month 		52.6°F
(11.4°C)		 51.7°F
(10.9°C)		 0.9°F
(0.5°C)		 97th Coolest
Coolest since:
 1905
30th Warmest
Warmest since:
 2017
Ties: 2001
Sep 2017–Aug 2020
36-Month 		52.7°F
(11.5°C)		 51.7°F
(10.9°C)		 1.0°F
(0.6°C)		 104th Coolest
Coolest since:
 1979
22nd Warmest
Warmest since:
 2018
Ties: 1989, 1992
Sep 2016–Aug 2020
48-Month 		53.3°F
(11.8°C)		 51.6°F
(10.9°C)		 1.7°F
(0.9°C)		 119th Coolest
Coolest since:
 1905
6th Warmest
Warmest since:
 2019
Ties: 2001, 2008, 2013
Sep 2015–Aug 2020
60-Month 		53.7°F
(12.1°C)		 51.6°F
(10.9°C)		 2.1°F
(1.2°C)		 123rd Coolest
Coolest since:
 1906
1st Warmest
Warmest to Date
 2020

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