Statewide Rankings

Statewide Data Info
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Illinois

Average Temperature Rankings, September 1921

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 1921
1-Month 		70.3°F
(21.3°C)		 66.2°F
(19.0°C)		 4.1°F
(2.3°C)		 118th Coolest
Coolest since:
 1918
11th Warmest
Warmest since:
 1925, 1933
Ties: 2018
Aug–Sep 1921
2-Month 		71.7°F
(22.1°C)		 69.8°F
(21.0°C)		 1.9°F
(1.1°C)		 99th Coolest
Coolest since:
 1967
30th Warmest
Warmest since:
 1936
Jul–Sep 1921
3-Month 		74.3°F
(23.5°C)		 71.7°F
(22.1°C)		 2.6°F
(1.4°C)		 122nd Coolest
Coolest since:
 1967
7th Warmest
Warmest to Date
 1936
Jun–Sep 1921
4-Month 		74.6°F
(23.7°C)		 71.7°F
(22.1°C)		 2.9°F
(1.6°C)		 125th Coolest
Coolest since:
 1915, 1924
4th Warmest
Warmest to Date
 1936
May–Sep 1921
5-Month 		72.5°F
(22.5°C)		 69.7°F
(20.9°C)		 2.8°F
(1.6°C)		 124th Coolest
Coolest since:
 1924
5th Warmest
Warmest to Date
 1936
Apr–Sep 1921
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 to Date
 2010
Ties: 1934, 1991
Mar–Sep 1921
7-Month 		66.5°F
(19.2°C)		 62.9°F
(17.2°C)		 3.6°F
(2.0°C)		 127th Coolest
Coolest since:
 1924
2nd Warmest
Warmest to Date
 2012
Feb–Sep 1921
8-Month 		62.5°F
(16.9°C)		 58.7°F
(14.8°C)		 3.8°F
(2.1°C)		 127th Coolest
Coolest since:
 1904
2nd Warmest
Warmest to Date
 2012
Jan–Sep 1921
9-Month 		59.2°F
(15.1°C)		 54.9°F
(12.7°C)		 4.3°F
(2.4°C)		 127th Coolest
Coolest since:
 1904, 1912
2nd Warmest
Warmest to Date
 2012
Dec 1920–Sep 1921
10-Month 		56.4°F
(13.6°C)		 52.4°F
(11.3°C)		 4.0°F
(2.3°C)		 126th Coolest
Coolest since:
 1904
2nd Warmest
Warmest to Date
 2012
Nov 1920–Sep 1921
11-Month 		54.8°F
(12.7°C)		 51.4°F
(10.8°C)		 3.4°F
(1.9°C)		 125th Coolest
Coolest since:
 1904
3rd Warmest
Warmest to Date
 2012
Oct 1920–Sep 1921
12-Month 		55.2°F
(12.9°C)		 51.6°F
(10.9°C)		 3.6°F
(2.0°C)		 125th Coolest
Coolest since:
 1904
3rd Warmest
Warmest to Date
 2012
Apr 1920–Sep 1921
18-Month 		58.5°F
(14.7°C)		 56.7°F
(13.7°C)		 1.8°F
(1.0°C)		 118th Coolest
Coolest since:
 1904, 1918
10th Warmest
Warmest to Date
 2012
Ties: 2000
Oct 1919–Sep 1921
24-Month 		52.5°F
(11.4°C)		 51.6°F
(10.9°C)		 0.9°F
(0.5°C)		 93rd Coolest
Coolest since:
 1979
34th Warmest
Warmest since:
 2017
Ties: 2019
Oct 1918–Sep 1921
36-Month 		52.8°F
(11.6°C)		 51.6°F
(10.9°C)		 1.2°F
(0.7°C)		 105th Coolest
Coolest since:
 1979
21st Warmest
Warmest to Date
 2018
Ties: 1992, 1999
Oct 1917–Sep 1921
48-Month 		51.9°F
(11.1°C)		 51.6°F
(10.9°C)		 0.3°F
(0.2°C)		 73rd Coolest
Coolest since:
 1905
52nd Warmest
Warmest to Date
 2019
Ties: 1937, 1938, 1943, 1975, 1994, 2016
Oct 1916–Sep 1921
60-Month 		51.4°F
(10.8°C)		 51.6°F
(10.9°C)		 -0.2°F
(-0.1°C)		 41st Coolest
Coolest since:
 1906
83rd Warmest
Warmest since:
 2020
Ties: 1901, 1915, 1917, 1926, 1951, 1968, 1984, 1985, 1996

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