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, September 2012

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 2012
1-Month 		64.9°F
(18.3°C)		 66.2°F
(19.0°C)		 -1.3°F
(-0.7°C)		 38th Coolest
Coolest since:
 1918
91st Warmest
Warmest since:
 1925, 1933
Ties: 1903
Aug–Sep 2012
2-Month 		69.2°F
(20.7°C)		 69.8°F
(21.0°C)		 -0.6°F
(-0.3°C)		 42nd Coolest
Coolest since:
 1967
87th Warmest
Warmest since:
 1936
Ties: 1923, 1934, 1943, 1969, 2006, 2011, 2014, 2020
Jul–Sep 2012
3-Month 		73.4°F
(23.0°C)		 71.7°F
(22.1°C)		 1.7°F
(0.9°C)		 103rd Coolest
Coolest since:
 1967
26th Warmest
Warmest since:
 1936
Jun–Sep 2012
4-Month 		73.2°F
(22.9°C)		 71.6°F
(22.0°C)		 1.6°F
(0.9°C)		 104th Coolest
Coolest since:
 1915, 1924
25th Warmest
Warmest since:
 1936
Ties: 1987, 1998, 2019
May–Sep 2012
5-Month 		72.2°F
(22.3°C)		 69.7°F
(20.9°C)		 2.5°F
(1.4°C)		 121st Coolest
Coolest since:
 1924
8th Warmest
Warmest since:
 1936
Ties: 1987, 1991, 2010
Apr–Sep 2012
6-Month 		69.3°F
(20.7°C)		 66.7°F
(19.3°C)		 2.6°F
(1.4°C)		 123rd Coolest
Coolest since:
 1907
6th Warmest
Warmest since:
 2010
Mar–Sep 2012
7-Month 		67.3°F
(19.6°C)		 62.9°F
(17.2°C)		 4.4°F
(2.4°C)		 128th Coolest
Coolest since:
 1924
1st Warmest
Warmest to Date
 2012
Feb–Sep 2012
8-Month 		63.4°F
(17.4°C)		 58.7°F
(14.8°C)		 4.7°F
(2.6°C)		 128th Coolest
Coolest since:
 1904
1st Warmest
Warmest to Date
 2012
Jan–Sep 2012
9-Month 		59.9°F
(15.5°C)		 55.0°F
(12.8°C)		 4.9°F
(2.7°C)		 128th Coolest
Coolest since:
 1904, 1912
1st Warmest
Warmest to Date
 2012
Dec 2011–Sep 2012
10-Month 		57.5°F
(14.2°C)		 52.4°F
(11.3°C)		 5.1°F
(2.9°C)		 127th Coolest
Coolest since:
 1904
1st Warmest
Warmest to Date
 2012
Nov 2011–Sep 2012
11-Month 		56.4°F
(13.6°C)		 51.3°F
(10.7°C)		 5.1°F
(2.9°C)		 127th Coolest
Coolest since:
 1904
1st Warmest
Warmest to Date
 2012
Oct 2011–Sep 2012
12-Month 		56.3°F
(13.5°C)		 51.6°F
(10.9°C)		 4.7°F
(2.6°C)		 127th Coolest
Coolest since:
 1904
1st Warmest
Warmest to Date
 2012
Apr 2011–Sep 2012
18-Month 		60.1°F
(15.6°C)		 56.6°F
(13.7°C)		 3.5°F
(1.9°C)		 127th Coolest
Coolest since:
 1904, 1918
1st Warmest
Warmest to Date
 2012
Oct 2010–Sep 2012
24-Month 		54.2°F
(12.3°C)		 51.6°F
(10.9°C)		 2.6°F
(1.4°C)		 125th Coolest
Coolest since:
 1979
2nd Warmest
Warmest to Date
 2017
Ties: 2013
Oct 2009–Sep 2012
36-Month 		53.8°F
(12.1°C)		 51.6°F
(10.9°C)		 2.2°F
(1.2°C)		 123rd Coolest
Coolest since:
 1979
3rd Warmest
Warmest since:
 2018
Ties: 2007, 2017
Oct 2008–Sep 2012
48-Month 		53.1°F
(11.7°C)		 51.6°F
(10.9°C)		 1.5°F
(0.8°C)		 115th Coolest
Coolest since:
 1905
10th Warmest
Warmest since:
 2019
Ties: 1933, 1935, 1955, 2000, 2005
Oct 2007–Sep 2012
60-Month 		52.9°F
(11.6°C)		 51.6°F
(10.9°C)		 1.3°F
(0.7°C)		 114th Coolest
Coolest since:
 1906
10th Warmest
Warmest since:
 2020
Ties: 2003, 2013

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