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 2017

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
August 2017
1-Month 		69.5°F
(20.8°C)		 72.1°F
(22.3°C)		 -2.6°F
(-1.5°C)		 16th Coolest
Coolest since:
 1915
113th Warmest
Warmest since:
 1947
Jul–Aug 2017
2-Month 		72.1°F
(22.3°C)		 73.3°F
(22.9°C)		 -1.2°F
(-0.6°C)		 35th Coolest
Coolest since:
 1915
94th Warmest
Warmest since:
 1936
Ties: 2008
Jun–Aug 2017
3-Month 		72.2°F
(22.3°C)		 72.3°F
(22.4°C)		 -0.1°F
(-0.1°C)		 55th Coolest
Coolest since:
 1915
74th Warmest
Warmest since:
 1936
Ties: 1989, 2001
May–Aug 2017
4-Month 		69.3°F
(20.7°C)		 69.5°F
(20.8°C)		 -0.2°F
(-0.1°C)		 53rd Coolest
Coolest since:
 1915
76th Warmest
Warmest since:
 1934
Ties: 1906, 1926, 1973, 1982
Apr–Aug 2017
5-Month 		66.5°F
(19.2°C)		 65.5°F
(18.6°C)		 1.0°F
(0.6°C)		 88th Coolest
Coolest since:
 1907
41st Warmest
Warmest since:
 1991
Ties: 1931, 1942, 1953
Mar–Aug 2017
6-Month 		62.4°F
(16.9°C)		 61.0°F
(16.1°C)		 1.4°F
(0.8°C)		 106th Coolest
Coolest since:
 1904
23rd Warmest
Warmest since:
 2012
Feb–Aug 2017
7-Month 		59.2°F
(15.1°C)		 56.2°F
(13.4°C)		 3.0°F
(1.7°C)		 123rd Coolest
Coolest since:
 1904
6th Warmest
Warmest since:
 2012
Ties: 2010
Jan–Aug 2017
8-Month 		55.7°F
(13.2°C)		 52.2°F
(11.2°C)		 3.5°F
(2.0°C)		 125th Coolest
Coolest since:
 1904, 1912
4th Warmest
Warmest since:
 2012
Ties: 1991
Dec 2016–Aug 2017
9-Month 		52.6°F
(11.4°C)		 49.5°F
(9.7°C)		 3.1°F
(1.7°C)		 121st Coolest
Coolest since:
 1904
7th Warmest
Warmest since:
 2012
Nov 2016–Aug 2017
10-Month 		52.1°F
(11.2°C)		 48.5°F
(9.2°C)		 3.6°F
(2.0°C)		 124th Coolest
Coolest since:
 1904
4th Warmest
Warmest since:
 2012
Oct 2016–Aug 2017
11-Month 		52.7°F
(11.5°C)		 49.0°F
(9.4°C)		 3.7°F
(2.1°C)		 125th Coolest
Coolest since:
 1904
3rd Warmest
Warmest since:
 2012
Sep 2016–Aug 2017
12-Month 		54.2°F
(12.3°C)		 50.3°F
(10.2°C)		 3.9°F
(2.1°C)		 126th Coolest
Coolest since:
 1904
2nd Warmest
Warmest since:
 2012
Ties: 2016
Mar 2016–Aug 2017
18-Month 		57.3°F
(14.1°C)		 53.9°F
(12.2°C)		 3.4°F
(1.9°C)		 126th Coolest
Coolest since:
 1904
2nd Warmest
Warmest since:
 2012
Sep 2015–Aug 2017
24-Month 		54.2°F
(12.3°C)		 50.3°F
(10.2°C)		 3.9°F
(2.1°C)		 126th Coolest
Coolest since:
 1905
1st Warmest
Warmest to Date
 2017
Sep 2014–Aug 2017
36-Month 		52.6°F
(11.4°C)		 50.3°F
(10.2°C)		 2.3°F
(1.2°C)		 123rd Coolest
Coolest since:
 1904
3rd Warmest
Warmest since:
 2018
Ties: 2012
Sep 2013–Aug 2017
48-Month 		51.5°F
(10.8°C)		 50.3°F
(10.2°C)		 1.2°F
(0.6°C)		 104th Coolest
Coolest since:
 1905
21st Warmest
Warmest since:
 2019
Ties: 1989, 1991, 2003, 2021
Sep 2012–Aug 2017
60-Month 		51.4°F
(10.8°C)		 50.3°F
(10.2°C)		 1.1°F
(0.6°C)		 101st Coolest
Coolest since:
 1906
23rd Warmest
Warmest since:
 2020
Ties: 1936, 1989, 1992, 2004, 2014

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