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 3. West

Average Temperature Rankings, January 2018

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2023)		 Warmest/Coolest
Since		 Record
January 2018
1-Month 		23.1°F
(-4.9°C)		 23.8°F
(-4.6°C)		 -0.7°F
(-0.3°C)		 48th Coolest
Coolest since:
 1977
82nd Warmest
Warmest since:
 2006
Ties: 1922, 1961, 1968
Dec 2017–Jan 2018
2-Month 		26.1°F
(-3.3°C)		 26.1°F
(-3.3°C)		 0.0°F
(0.0°C)		 56th Coolest
Coolest since:
 1918
73rd Warmest
Warmest since:
 1932
Ties: 1928, 1990
Nov 2017–Jan 2018
3-Month 		30.8°F
(-0.7°C)		 30.8°F
(-0.7°C)		 0.0°F
(0.0°C)		 57th Coolest
Coolest since:
 1977
72nd Warmest
Warmest since:
 2002
Ties: 1990, 2003
Oct 2017–Jan 2018
4-Month 		37.5°F
(3.1°C)		 36.8°F
(2.7°C)		 0.7°F
(0.4°C)		 72nd Coolest
Coolest since:
 1977
57th Warmest
Warmest since:
 1932
Sep 2017–Jan 2018
5-Month 		43.7°F
(6.5°C)		 42.6°F
(5.9°C)		 1.1°F
(0.6°C)		 84th Coolest
Coolest since:
 1977
45th Warmest
Warmest since:
 1932
Ties: 1906, 1922, 1980, 1992
Aug 2017–Jan 2018
6-Month 		48.1°F
(8.9°C)		 47.8°F
(8.8°C)		 0.3°F
(0.1°C)		 68th Coolest
Coolest since:
 1977
61st Warmest
Warmest since:
 1932
Ties: 1933, 1953
Jul 2017–Jan 2018
7-Month 		52.1°F
(11.2°C)		 51.8°F
(11.0°C)		 0.3°F
(0.2°C)		 67th Coolest
Coolest since:
 1977
62nd Warmest
Warmest since:
 1932
Ties: 1928, 1966
Jun 2017–Jan 2018
8-Month 		54.7°F
(12.6°C)		 54.3°F
(12.4°C)		 0.4°F
(0.2°C)		 73rd Coolest
Coolest since:
 1977
56th Warmest
Warmest since:
 1932
Ties: 1958, 1980, 1983, 1998, 2003
May 2017–Jan 2018
9-Month 		55.5°F
(13.1°C)		 55.2°F
(12.9°C)		 0.3°F
(0.2°C)		 70th Coolest
Coolest since:
 1918, 1977
59th Warmest
Warmest since:
 1932
Ties: 1907, 1940, 1948, 1958
Apr 2017–Jan 2018
10-Month 		55.5°F
(13.1°C)		 54.8°F
(12.7°C)		 0.7°F
(0.4°C)		 80th Coolest
Coolest since:
 1918
49th Warmest
Warmest since:
 1932
Ties: 1897, 1933, 1966
Mar 2017–Jan 2018
11-Month 		54.3°F
(12.4°C)		 53.4°F
(11.9°C)		 0.9°F
(0.5°C)		 94th Coolest
Coolest since:
 1918
35th Warmest
Warmest since:
 1932, 2013, 2017
Ties: 1995, 2005, 2021
Feb 2017–Jan 2018
12-Month 		53.2°F
(11.8°C)		 51.2°F
(10.7°C)		 2.0°F
(1.1°C)		 114th Coolest
Coolest since:
 1918
15th Warmest
Warmest since:
 1932
Ties: 1942, 1955
Aug 2016–Jan 2018
18-Month 		52.7°F
(11.5°C)		 50.1°F
(10.1°C)		 2.6°F
(1.4°C)		 124th Coolest
Coolest since:
 1905, 1918
4th Warmest
Warmest since:
 2017
Ties: 1922
Feb 2016–Jan 2018
24-Month 		53.8°F
(12.1°C)		 51.2°F
(10.7°C)		 2.6°F
(1.4°C)		 125th Coolest
Coolest since:
 1918
3rd Warmest
Warmest since:
 1932
Feb 2015–Jan 2018
36-Month 		53.4°F
(11.9°C)		 51.2°F
(10.7°C)		 2.2°F
(1.2°C)		 125th Coolest
Coolest since:
 1905
2nd Warmest
Warmest since:
 1933
Feb 2014–Jan 2018
48-Month 		52.3°F
(11.3°C)		 51.2°F
(10.7°C)		 1.1°F
(0.6°C)		 109th Coolest
Coolest since:
 1905
17th Warmest
Warmest since:
 1934
Ties: 1922, 1958, 1989, 2006, 2009, 2014
Feb 2013–Jan 2018
60-Month 		51.7°F
(10.9°C)		 51.2°F
(10.7°C)		 0.5°F
(0.2°C)		 85th Coolest
Coolest since:
 1906, 1907
40th Warmest
Warmest since:
 1935
Ties: 1925, 1926, 1938, 1940, 1944, 1959, 1988, 2015, 2016

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