Divisional Rankings

Divisional Data Info
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Illinois, Climate Division 2. Northeast

Average Temperature Rankings, September 1991

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 1991
1-Month 		63.5°F
(17.5°C)		 63.7°F
(17.6°C)		 -0.2°F
(-0.1°C)		 55th Coolest
Coolest since:
 1918
74th Warmest
Warmest since:
 1897
Ties: 1969
Aug–Sep 1991
2-Month 		68.4°F
(20.2°C)		 67.5°F
(19.7°C)		 0.9°F
(0.5°C)		 86th Coolest
Coolest since:
 1902
43rd Warmest
Warmest since:
 1947
Ties: 1905, 1920, 2003, 2022
Jul–Sep 1991
3-Month 		70.6°F
(21.4°C)		 69.4°F
(20.8°C)		 1.2°F
(0.6°C)		 96th Coolest
Coolest since:
 1924
33rd Warmest
Warmest since:
 1936
Ties: 1895, 1930, 1978
Jun–Sep 1991
4-Month 		71.2°F
(21.8°C)		 69.2°F
(20.7°C)		 2.0°F
(1.1°C)		 111th Coolest
Coolest since:
 1915
18th Warmest
Warmest since:
 2005
May–Sep 1991
5-Month 		70.2°F
(21.2°C)		 67.2°F
(19.6°C)		 3.0°F
(1.6°C)		 125th Coolest
Coolest since:
 1924
4th Warmest
Warmest since:
 1921, 1988
Ties: 1934, 1936
Apr–Sep 1991
6-Month 		67.2°F
(19.6°C)		 63.9°F
(17.7°C)		 3.3°F
(1.9°C)		 127th Coolest
Coolest since:
 1907
2nd Warmest
Warmest since:
 1921
Ties: 2010
Mar–Sep 1991
7-Month 		63.3°F
(17.4°C)		 59.9°F
(15.5°C)		 3.4°F
(1.9°C)		 125th Coolest
Coolest since:
 1924
4th Warmest
Warmest since:
 2012
Feb–Sep 1991
8-Month 		59.1°F
(15.1°C)		 55.5°F
(13.1°C)		 3.6°F
(2.0°C)		 125th Coolest
Coolest since:
 1904, 1917
4th Warmest
Warmest since:
 2012
Jan–Sep 1991
9-Month 		54.7°F
(12.6°C)		 51.7°F
(10.9°C)		 3.0°F
(1.7°C)		 123rd Coolest
Coolest since:
 1904, 1912
6th Warmest
Warmest since:
 2012
Ties: 2005, 2017
Dec 1990–Sep 1991
10-Month 		52.0°F
(11.1°C)		 49.1°F
(9.5°C)		 2.9°F
(1.6°C)		 121st Coolest
Coolest since:
 1904
7th Warmest
Warmest since:
 2012
Ties: 2005
Nov 1990–Sep 1991
11-Month 		51.3°F
(10.7°C)		 48.2°F
(9.0°C)		 3.1°F
(1.7°C)		 122nd Coolest
Coolest since:
 1904
6th Warmest
Warmest since:
 2012
Oct 1990–Sep 1991
12-Month 		51.2°F
(10.7°C)		 48.4°F
(9.1°C)		 2.8°F
(1.6°C)		 120th Coolest
Coolest since:
 1904
8th Warmest
Warmest since:
 2012
Ties: 1987
Apr 1990–Sep 1991
18-Month 		55.4°F
(13.0°C)		 53.6°F
(12.0°C)		 1.8°F
(1.0°C)		 114th Coolest
Coolest since:
 1904
14th Warmest
Warmest since:
 2012
Ties: 1988, 2021
Oct 1989–Sep 1991
24-Month 		50.2°F
(10.1°C)		 48.4°F
(9.1°C)		 1.8°F
(1.0°C)		 110th Coolest
Coolest since:
 1918
17th Warmest
Warmest since:
 2017
Ties: 2002
Oct 1988–Sep 1991
36-Month 		49.5°F
(9.7°C)		 48.4°F
(9.1°C)		 1.1°F
(0.6°C)		 97th Coolest
Coolest since:
 1979
29th Warmest
Warmest since:
 2000
Ties: 1922, 2003, 2014, 2020
Oct 1987–Sep 1991
48-Month 		49.6°F
(9.8°C)		 48.4°F
(9.1°C)		 1.2°F
(0.7°C)		 104th Coolest
Coolest since:
 1905, 1918
21st Warmest
Warmest since:
 2001, 2002, 2019
Ties: 1935, 1956, 1990
Oct 1986–Sep 1991
60-Month 		49.9°F
(9.9°C)		 48.4°F
(9.1°C)		 1.5°F
(0.8°C)		 114th Coolest
Coolest since:
 1905, 1906
10th Warmest
Warmest to Date
 2002
Ties: 2005, 2012, 2013, 2022

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