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 1921

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
September 1921
1-Month 		67.1°F
(19.5°C)		 63.7°F
(17.6°C)		 3.4°F
(1.9°C)		 108th Coolest
Coolest since:
 1918
21st Warmest
Warmest since:
 1897
Ties: 2007, 2017
Aug–Sep 1921
2-Month 		69.2°F
(20.7°C)		 67.4°F
(19.7°C)		 1.8°F
(1.0°C)		 100th Coolest
Coolest since:
 1902
29th Warmest
Warmest since:
 1947
Ties: 1897
Jul–Sep 1921
3-Month 		72.3°F
(22.4°C)		 69.3°F
(20.7°C)		 3.0°F
(1.7°C)		 122nd Coolest
Coolest since:
 1924
7th Warmest
Warmest to Date
 1936
Ties: 1931
Jun–Sep 1921
4-Month 		72.7°F
(22.6°C)		 69.2°F
(20.7°C)		 3.5°F
(1.9°C)		 127th Coolest
Coolest since:
 1915
2nd Warmest
Warmest to Date
 2005
Ties: 1988
May–Sep 1921
5-Month 		70.5°F
(21.4°C)		 67.1°F
(19.5°C)		 3.4°F
(1.9°C)		 128th Coolest
Coolest since:
 1924
1st Warmest
Warmest to Date
 1921, 1988
Ties: 1988
Apr–Sep 1921
6-Month 		67.5°F
(19.7°C)		 63.9°F
(17.7°C)		 3.6°F
(2.0°C)		 128th Coolest
Coolest since:
 1907
1st Warmest
Warmest to Date
 1921
Mar–Sep 1921
7-Month 		64.2°F
(17.9°C)		 59.9°F
(15.5°C)		 4.3°F
(2.4°C)		 127th Coolest
Coolest since:
 1924
2nd Warmest
Warmest to Date
 2012
Feb–Sep 1921
8-Month 		60.0°F
(15.6°C)		 55.5°F
(13.1°C)		 4.5°F
(2.5°C)		 127th Coolest
Coolest since:
 1904, 1917
2nd Warmest
Warmest to Date
 2012
Jan–Sep 1921
9-Month 		56.5°F
(13.6°C)		 51.7°F
(10.9°C)		 4.8°F
(2.7°C)		 127th Coolest
Coolest since:
 1904, 1912
2nd Warmest
Warmest to Date
 2012
Dec 1920–Sep 1921
10-Month 		53.7°F
(12.1°C)		 49.1°F
(9.5°C)		 4.6°F
(2.6°C)		 126th Coolest
Coolest since:
 1904
2nd Warmest
Warmest to Date
 2012
Nov 1920–Sep 1921
11-Month 		52.1°F
(11.2°C)		 48.1°F
(8.9°C)		 4.0°F
(2.3°C)		 125th Coolest
Coolest since:
 1904
3rd Warmest
Warmest to Date
 2012
Oct 1920–Sep 1921
12-Month 		52.6°F
(11.4°C)		 48.5°F
(9.2°C)		 4.1°F
(2.2°C)		 126th Coolest
Coolest since:
 1904
2nd Warmest
Warmest to Date
 2012
Apr 1920–Sep 1921
18-Month 		55.9°F
(13.3°C)		 53.6°F
(12.0°C)		 2.3°F
(1.3°C)		 121st Coolest
Coolest since:
 1904
7th Warmest
Warmest to Date
 2012
Ties: 1987
Oct 1919–Sep 1921
24-Month 		49.5°F
(9.7°C)		 48.5°F
(9.2°C)		 1.0°F
(0.5°C)		 98th Coolest
Coolest since:
 1918
29th Warmest
Warmest to Date
 2017
Ties: 1934, 1998
Oct 1918–Sep 1921
36-Month 		49.9°F
(9.9°C)		 48.4°F
(9.1°C)		 1.5°F
(0.8°C)		 108th Coolest
Coolest since:
 1979
18th Warmest
Warmest to Date
 2000
Ties: 1932, 2019, 2021
Oct 1917–Sep 1921
48-Month 		48.9°F
(9.4°C)		 48.4°F
(9.1°C)		 0.5°F
(0.3°C)		 77th Coolest
Coolest since:
 1905, 1918
48th Warmest
Warmest to Date
 2001, 2002, 2019
Oct 1916–Sep 1921
60-Month 		48.2°F
(9.0°C)		 48.4°F
(9.1°C)		 -0.2°F
(-0.1°C)		 39th Coolest
Coolest since:
 1905, 1906
85th Warmest
Warmest since:
 2002
Ties: 1902, 1910, 1911, 1914, 1961, 1972, 1978

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