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, July 2018

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
July 2018
1-Month 		75.0°F
(23.9°C)		 75.6°F
(24.2°C)		 -0.6°F
(-0.3°C)		 52nd Coolest
Coolest since:
 2009, 2014
77th Warmest
Warmest since:
 1936
Ties: 1898, 1937, 1970
Jun–Jul 2018
2-Month 		74.9°F
(23.8°C)		 73.4°F
(23.0°C)		 1.5°F
(0.8°C)		 98th Coolest
Coolest since:
 1915
31st Warmest
Warmest since:
 1934
May–Jul 2018
3-Month 		73.5°F
(23.1°C)		 69.7°F
(20.9°C)		 3.8°F
(2.2°C)		 125th Coolest
Coolest since:
 1924
4th Warmest
Warmest since:
 1934
Apr–Jul 2018
4-Month 		66.4°F
(19.1°C)		 65.2°F
(18.4°C)		 1.2°F
(0.7°C)		 99th Coolest
Coolest since:
 1907
30th Warmest
Warmest since:
 1934
Ties: 1901, 1922, 1932, 1959, 2016
Mar–Jul 2018
5-Month 		60.9°F
(16.1°C)		 60.1°F
(15.6°C)		 0.8°F
(0.5°C)		 83rd Coolest
Coolest since:
 1960
46th Warmest
Warmest since:
 2012
Ties: 1910, 1919, 1976
Feb–Jul 2018
6-Month 		56.1°F
(13.4°C)		 55.0°F
(12.8°C)		 1.1°F
(0.6°C)		 97th Coolest
Coolest since:
 1947
32nd Warmest
Warmest since:
 2012
Ties: 1949, 1957, 1964
Jan–Jul 2018
7-Month 		51.5°F
(10.8°C)		 50.7°F
(10.4°C)		 0.8°F
(0.4°C)		 83rd Coolest
Coolest since:
 1912
46th Warmest
Warmest since:
 2012
Ties: 1898, 1942, 1981
Dec 2017–Jul 2018
8-Month 		48.8°F
(9.3°C)		 48.1°F
(8.9°C)		 0.7°F
(0.4°C)		 79th Coolest
Coolest since:
 1904
49th Warmest
Warmest since:
 2012
Ties: 1925, 1990
Nov 2017–Jul 2018
9-Month 		48.0°F
(8.9°C)		 47.2°F
(8.4°C)		 0.8°F
(0.5°C)		 85th Coolest
Coolest since:
 1904
43rd Warmest
Warmest since:
 2012
Ties: 1911, 1925, 1957
Oct 2017–Jul 2018
10-Month 		49.0°F
(9.4°C)		 48.0°F
(8.9°C)		 1.0°F
(0.5°C)		 90th Coolest
Coolest since:
 1904
38th Warmest
Warmest since:
 2012
Ties: 1933, 1974
Sep 2017–Jul 2018
11-Month 		50.8°F
(10.4°C)		 49.6°F
(9.8°C)		 1.2°F
(0.6°C)		 97th Coolest
Coolest since:
 1904
31st Warmest
Warmest since:
 2012
Ties: 1964, 2007, 2010
Aug 2017–Jul 2018
12-Month 		52.5°F
(11.4°C)		 51.7°F
(10.9°C)		 0.8°F
(0.5°C)		 90th Coolest
Coolest since:
 1904
38th Warmest
Warmest since:
 2012
Ties: 1938, 1964, 2008, 2010
Feb 2017–Jul 2018
18-Month 		54.5°F
(12.5°C)		 52.7°F
(11.5°C)		 1.8°F
(1.0°C)		 111th Coolest
Coolest since:
 1918
17th Warmest
Warmest since:
 2012
Aug 2016–Jul 2018
24-Month 		54.0°F
(12.2°C)		 51.6°F
(10.9°C)		 2.4°F
(1.3°C)		 124th Coolest
Coolest since:
 1905
3rd Warmest
Warmest since:
 2017
Ties: 1932, 1999, 2000, 2013
Aug 2015–Jul 2018
36-Month 		54.3°F
(12.4°C)		 51.6°F
(10.9°C)		 2.7°F
(1.5°C)		 125th Coolest
Coolest since:
 1979
1st Warmest
Warmest to Date
 2018
Aug 2014–Jul 2018
48-Month 		53.5°F
(11.9°C)		 51.6°F
(10.9°C)		 1.9°F
(1.0°C)		 123rd Coolest
Coolest since:
 1905, 1980
2nd Warmest
Warmest to Date
 2019
Aug 2013–Jul 2018
60-Month 		52.7°F
(11.5°C)		 51.6°F
(10.9°C)		 1.1°F
(0.6°C)		 108th Coolest
Coolest since:
 1906
16th Warmest
Warmest since:
 2020
Ties: 1936, 1956, 1991, 2001, 2004, 2010, 2016

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