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 2015

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 2015
1-Month 		68.6°F
(20.3°C)		 63.7°F
(17.6°C)		 4.9°F
(2.7°C)		 122nd Coolest
Coolest since:
 1918
7th Warmest
Warmest since:
 1897
Aug–Sep 2015
2-Month 		69.4°F
(20.8°C)		 67.4°F
(19.7°C)		 2.0°F
(1.1°C)		 105th Coolest
Coolest since:
 1902
24th Warmest
Warmest since:
 1947
Ties: 2019
Jul–Sep 2015
3-Month 		70.1°F
(21.2°C)		 69.4°F
(20.8°C)		 0.7°F
(0.4°C)		 81st Coolest
Coolest since:
 1924
48th Warmest
Warmest since:
 1936
Ties: 1922, 1953, 1970, 2022
Jun–Sep 2015
4-Month 		69.5°F
(20.8°C)		 69.2°F
(20.7°C)		 0.3°F
(0.1°C)		 68th Coolest
Coolest since:
 1915
61st Warmest
Warmest since:
 2005
Ties: 1937, 1968
May–Sep 2015
5-Month 		67.9°F
(19.9°C)		 67.1°F
(19.5°C)		 0.8°F
(0.4°C)		 83rd Coolest
Coolest since:
 1924
46th Warmest
Warmest since:
 1921, 1988
Ties: 1906, 1978
Apr–Sep 2015
6-Month 		65.0°F
(18.3°C)		 63.9°F
(17.7°C)		 1.1°F
(0.6°C)		 92nd Coolest
Coolest since:
 1907
37th Warmest
Warmest since:
 1921
Ties: 1906, 1919, 1930, 1970
Mar–Sep 2015
7-Month 		60.5°F
(15.8°C)		 59.9°F
(15.5°C)		 0.6°F
(0.3°C)		 77th Coolest
Coolest since:
 1924
52nd Warmest
Warmest since:
 2012
Ties: 1908, 1953, 1963, 1990
Feb–Sep 2015
8-Month 		54.8°F
(12.7°C)		 55.5°F
(13.1°C)		 -0.7°F
(-0.4°C)		 35th Coolest
Coolest since:
 1904, 1917
94th Warmest
Warmest since:
 2012
Ties: 1903, 1914, 1937, 1943, 1992
Jan–Sep 2015
9-Month 		51.0°F
(10.6°C)		 51.7°F
(10.9°C)		 -0.7°F
(-0.3°C)		 38th Coolest
Coolest since:
 1904, 1912
91st Warmest
Warmest since:
 2012
Ties: 1943, 1969
Dec 2014–Sep 2015
10-Month 		49.1°F
(9.5°C)		 49.2°F
(9.6°C)		 -0.1°F
(-0.1°C)		 62nd Coolest
Coolest since:
 1904
66th Warmest
Warmest since:
 2012
Ties: 1975
Nov 2014–Sep 2015
11-Month 		47.6°F
(8.7°C)		 48.2°F
(9.0°C)		 -0.6°F
(-0.3°C)		 39th Coolest
Coolest since:
 1904
89th Warmest
Warmest since:
 2012
Ties: 1923, 1928, 1956, 1969, 1994
Oct 2014–Sep 2015
12-Month 		47.9°F
(8.8°C)		 48.5°F
(9.2°C)		 -0.6°F
(-0.4°C)		 38th Coolest
Coolest since:
 1904
90th Warmest
Warmest since:
 2012
Apr 2014–Sep 2015
18-Month 		53.1°F
(11.7°C)		 53.6°F
(12.0°C)		 -0.5°F
(-0.3°C)		 37th Coolest
Coolest since:
 1904
91st Warmest
Warmest since:
 2012
Ties: 1907, 1915, 1925, 1943, 1946
Oct 2013–Sep 2015
24-Month 		46.8°F
(8.2°C)		 48.5°F
(9.2°C)		 -1.7°F
(-1.0°C)		 6th Coolest
Coolest since:
 1918
121st Warmest
Warmest since:
 2017
Ties: 1978
Oct 2012–Sep 2015
36-Month 		47.6°F
(8.7°C)		 48.5°F
(9.2°C)		 -0.9°F
(-0.5°C)		 13th Coolest
Coolest since:
 1979
113th Warmest
Warmest since:
 2000
Ties: 1920, 1927
Oct 2011–Sep 2015
48-Month 		49.1°F
(9.5°C)		 48.4°F
(9.1°C)		 0.7°F
(0.4°C)		 84th Coolest
Coolest since:
 1905, 1918
41st Warmest
Warmest since:
 2001, 2002, 2019
Ties: 1941, 1976, 1998
Oct 2010–Sep 2015
60-Month 		49.0°F
(9.4°C)		 48.4°F
(9.1°C)		 0.6°F
(0.3°C)		 82nd Coolest
Coolest since:
 1905, 1906
42nd Warmest
Warmest since:
 2002
Ties: 1922, 1955, 1958, 1976, 1994

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