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 2013

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
September 2013
1-Month		68.6°F
(20.3°C)		66.2°F
(19.0°C)		2.4°F
(1.3°C)		97th Coolest
Coolest since:
1918
32nd Warmest
Warmest since:
1925, 1933
Aug–Sep 2013
2-Month		70.7°F
(21.5°C)		69.8°F
(21.0°C)		0.9°F
(0.5°C)		86th Coolest
Coolest since:
1967
43rd Warmest
Warmest since:
1936
Ties: 1905, 1911, 1919
Jul–Sep 2013
3-Month		71.5°F
(21.9°C)		71.7°F
(22.1°C)		-0.2°F
(-0.2°C)		55th Coolest
Coolest since:
1967
74th Warmest
Warmest since:
1936
Ties: 1899, 1969, 1990
Jun–Sep 2013
4-Month		71.5°F
(21.9°C)		71.7°F
(22.1°C)		-0.2°F
(-0.2°C)		51st Coolest
Coolest since:
1915, 1924
78th Warmest
Warmest since:
1936
Ties: 1905, 1949, 1968
May–Sep 2013
5-Month		70.0°F
(21.1°C)		69.7°F
(20.9°C)		0.3°F
(0.2°C)		71st Coolest
Coolest since:
1924
58th Warmest
Warmest since:
1936
Ties: 1943, 1949, 2017, 2020
Apr–Sep 2013
6-Month		66.7°F
(19.3°C)		66.7°F
(19.3°C)		0.0°F
(0.0°C)		57th Coolest
Coolest since:
1907
72nd Warmest
Warmest since:
2010
Ties: 1943, 1956
Mar–Sep 2013
7-Month		62.1°F
(16.7°C)		62.9°F
(17.2°C)		-0.8°F
(-0.5°C)		35th Coolest
Coolest since:
1924
94th Warmest
Warmest since:
2012
Feb–Sep 2013
8-Month		58.0°F
(14.4°C)		58.7°F
(14.8°C)		-0.7°F
(-0.4°C)		37th Coolest
Coolest since:
1904
92nd Warmest
Warmest since:
2012
Ties: 1901, 1903, 1909, 1972
Jan–Sep 2013
9-Month		54.8°F
(12.7°C)		54.9°F
(12.7°C)		-0.1°F
(0.0°C)		60th Coolest
Coolest since:
1904, 1912
69th Warmest
Warmest since:
2012
Ties: 1901, 1943
Dec 2012–Sep 2013
10-Month		53.0°F
(11.7°C)		52.4°F
(11.3°C)		0.6°F
(0.4°C)		76th Coolest
Coolest since:
1904
52nd Warmest
Warmest since:
2012
Ties: 1957, 1986
Nov 2012–Sep 2013
11-Month		52.0°F
(11.1°C)		51.4°F
(10.8°C)		0.6°F
(0.3°C)		86th Coolest
Coolest since:
1904
42nd Warmest
Warmest since:
2012
Ties: 1896, 1930, 1946, 1986
Oct 2012–Sep 2013
12-Month		52.0°F
(11.1°C)		51.6°F
(10.9°C)		0.4°F
(0.2°C)		74th Coolest
Coolest since:
1904
54th Warmest
Warmest since:
2012
Ties: 1901, 1946, 1959, 1985, 1992, 2019
Apr 2012–Sep 2013
18-Month		57.8°F
(14.3°C)		56.7°F
(13.7°C)		1.1°F
(0.6°C)		99th Coolest
Coolest since:
1904, 1918
29th Warmest
Warmest since:
2012
Ties: 2020
Oct 2011–Sep 2013
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 since:
2017
Ties: 2012
Oct 2010–Sep 2013
36-Month		53.5°F
(11.9°C)		51.6°F
(10.9°C)		1.9°F
(1.0°C)		120th Coolest
Coolest since:
1979
6th Warmest
Warmest since:
2018
Ties: 1933, 2006
Oct 2009–Sep 2013
48-Month		53.4°F
(11.9°C)		51.6°F
(10.9°C)		1.8°F
(1.0°C)		121st Coolest
Coolest since:
1905
4th Warmest
Warmest since:
2019
Ties: 2002
Oct 2008–Sep 2013
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, 2012

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