Statewide Rankings

Statewide Data Info
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Illinois

Average Temperature Rankings, September 1991

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
September 1991
1-Month		66.4°F
(19.1°C)		66.2°F
(19.0°C)		0.2°F
(0.1°C)		67th Coolest
Coolest since:
1918
62nd Warmest
Warmest since:
1925, 1933
Aug–Sep 1991
2-Month		70.6°F
(21.4°C)		69.8°F
(21.0°C)		0.8°F
(0.4°C)		82nd Coolest
Coolest since:
1967
47th Warmest
Warmest since:
1936
Ties: 1926, 1944
Jul–Sep 1991
3-Month		72.5°F
(22.5°C)		71.7°F
(22.1°C)		0.8°F
(0.4°C)		86th Coolest
Coolest since:
1967
43rd Warmest
Warmest since:
1936
Ties: 1973
Jun–Sep 1991
4-Month		73.1°F
(22.8°C)		71.7°F
(22.1°C)		1.4°F
(0.7°C)		100th Coolest
Coolest since:
1915, 1924
29th Warmest
Warmest since:
1936
Ties: 1911, 1952, 1955, 1959
May–Sep 1991
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, 2010, 2012
Apr–Sep 1991
6-Month		69.5°F
(20.8°C)		66.7°F
(19.3°C)		2.8°F
(1.5°C)		126th Coolest
Coolest since:
1907
3rd Warmest
Warmest since:
2010
Ties: 1921, 1934
Mar–Sep 1991
7-Month		65.9°F
(18.8°C)		62.9°F
(17.2°C)		3.0°F
(1.6°C)		124th Coolest
Coolest since:
1924
5th Warmest
Warmest since:
2012
Feb–Sep 1991
8-Month		61.9°F
(16.6°C)		58.7°F
(14.8°C)		3.2°F
(1.8°C)		126th Coolest
Coolest since:
1904
3rd Warmest
Warmest since:
2012
Jan–Sep 1991
9-Month		57.6°F
(14.2°C)		54.9°F
(12.7°C)		2.7°F
(1.5°C)		122nd Coolest
Coolest since:
1904, 1912
7th Warmest
Warmest since:
2012
Ties: 2005
Dec 1990–Sep 1991
10-Month		54.9°F
(12.7°C)		52.4°F
(11.3°C)		2.5°F
(1.4°C)		120th Coolest
Coolest since:
1904
8th Warmest
Warmest since:
2012
Ties: 1954, 2005
Nov 1990–Sep 1991
11-Month		54.2°F
(12.3°C)		51.4°F
(10.8°C)		2.8°F
(1.5°C)		122nd Coolest
Coolest since:
1904
6th Warmest
Warmest since:
2012
Ties: 1998
Oct 1990–Sep 1991
12-Month		54.0°F
(12.2°C)		51.6°F
(10.9°C)		2.4°F
(1.3°C)		118th Coolest
Coolest since:
1904
10th Warmest
Warmest since:
2012
Ties: 2000
Apr 1990–Sep 1991
18-Month		58.0°F
(14.4°C)		56.7°F
(13.7°C)		1.3°F
(0.7°C)		106th Coolest
Coolest since:
1904, 1918
22nd Warmest
Warmest since:
2012
Ties: 1914, 1935, 2011
Oct 1989–Sep 1991
24-Month		53.2°F
(11.8°C)		51.6°F
(10.9°C)		1.6°F
(0.9°C)		112th Coolest
Coolest since:
1979
15th Warmest
Warmest since:
2017
Ties: 1988, 2016
Oct 1988–Sep 1991
36-Month		52.4°F
(11.3°C)		51.6°F
(10.9°C)		0.8°F
(0.4°C)		92nd Coolest
Coolest since:
1979
34th Warmest
Warmest since:
2018
Ties: 1943, 1957, 1993
Oct 1987–Sep 1991
48-Month		52.5°F
(11.4°C)		51.6°F
(10.9°C)		0.9°F
(0.5°C)		99th Coolest
Coolest since:
1905
26th Warmest
Warmest since:
2019
Ties: 2009
Oct 1986–Sep 1991
60-Month		52.8°F
(11.6°C)		51.6°F
(10.9°C)		1.2°F
(0.7°C)		111th Coolest
Coolest since:
1906
13th Warmest
Warmest since:
2020
Ties: 1957, 2009, 2016, 2022

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