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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  • Top 1/10
  • 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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