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 2. Northeast

Average Temperature Rankings, September 2018

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 2018
1-Month 		67.5°F
(19.7°C)		 63.7°F
(17.6°C)		 3.8°F
(2.1°C)		 114th Coolest
Coolest since:
 1918
15th Warmest
Warmest since:
 1897
Aug–Sep 2018
2-Month 		70.5°F
(21.4°C)		 67.4°F
(19.7°C)		 3.1°F
(1.7°C)		 117th Coolest
Coolest since:
 1902
12th Warmest
Warmest since:
 1947
Jul–Sep 2018
3-Month 		71.4°F
(21.9°C)		 69.3°F
(20.7°C)		 2.1°F
(1.2°C)		 110th Coolest
Coolest since:
 1924
19th Warmest
Warmest since:
 1936
Jun–Sep 2018
4-Month 		71.3°F
(21.8°C)		 69.2°F
(20.7°C)		 2.1°F
(1.1°C)		 112th Coolest
Coolest since:
 1915
17th Warmest
Warmest since:
 2005
May–Sep 2018
5-Month 		70.3°F
(21.3°C)		 67.2°F
(19.6°C)		 3.1°F
(1.7°C)		 126th Coolest
Coolest since:
 1924
3rd Warmest
Warmest since:
 1921, 1988
Apr–Sep 2018
6-Month 		65.3°F
(18.5°C)		 63.9°F
(17.7°C)		 1.4°F
(0.8°C)		 101st Coolest
Coolest since:
 1907
28th Warmest
Warmest since:
 1921
Mar–Sep 2018
7-Month 		61.1°F
(16.2°C)		 59.9°F
(15.5°C)		 1.2°F
(0.7°C)		 99th Coolest
Coolest since:
 1924
30th Warmest
Warmest since:
 2012
Ties: 1919, 1939, 1941, 1995, 2017
Feb–Sep 2018
8-Month 		56.7°F
(13.7°C)		 55.5°F
(13.1°C)		 1.2°F
(0.6°C)		 97th Coolest
Coolest since:
 1904, 1917
32nd Warmest
Warmest since:
 2012
Ties: 1946, 1953, 1990, 1995, 2007
Jan–Sep 2018
9-Month 		52.8°F
(11.6°C)		 51.7°F
(10.9°C)		 1.1°F
(0.7°C)		 87th Coolest
Coolest since:
 1904, 1912
42nd Warmest
Warmest since:
 2012
Ties: 1941, 2001
Dec 2017–Sep 2018
10-Month 		50.1°F
(10.1°C)		 49.1°F
(9.5°C)		 1.0°F
(0.6°C)		 88th Coolest
Coolest since:
 1904
40th Warmest
Warmest since:
 2012
Nov 2017–Sep 2018
11-Month 		49.0°F
(9.4°C)		 48.1°F
(8.9°C)		 0.9°F
(0.5°C)		 89th Coolest
Coolest since:
 1904
39th Warmest
Warmest since:
 2012
Ties: 1896, 2013
Oct 2017–Sep 2018
12-Month 		49.6°F
(9.8°C)		 48.5°F
(9.2°C)		 1.1°F
(0.6°C)		 97th Coolest
Coolest since:
 1904
31st Warmest
Warmest since:
 2012
Ties: 1933, 1941, 1953
Apr 2017–Sep 2018
18-Month 		54.7°F
(12.6°C)		 53.6°F
(12.0°C)		 1.1°F
(0.6°C)		 97th Coolest
Coolest since:
 1904
31st Warmest
Warmest since:
 2012
Ties: 1919, 1953, 2010
Oct 2016–Sep 2018
24-Month 		50.6°F
(10.3°C)		 48.5°F
(9.2°C)		 2.1°F
(1.1°C)		 119th Coolest
Coolest since:
 1918
8th Warmest
Warmest since:
 2017
Ties: 1988
Oct 2015–Sep 2018
36-Month 		51.2°F
(10.7°C)		 48.4°F
(9.1°C)		 2.8°F
(1.6°C)		 124th Coolest
Coolest since:
 1979
2nd Warmest
Warmest since:
 2000
Oct 2014–Sep 2018
48-Month 		50.4°F
(10.2°C)		 48.4°F
(9.1°C)		 2.0°F
(1.1°C)		 119th Coolest
Coolest since:
 1905, 1918
6th Warmest
Warmest since:
 2001, 2002, 2019
Oct 2013–Sep 2018
60-Month 		49.4°F
(9.7°C)		 48.4°F
(9.1°C)		 1.0°F
(0.6°C)		 96th Coolest
Coolest since:
 1905, 1906
28th Warmest
Warmest since:
 2002
Ties: 1956, 1988, 1989, 1992

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