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 8. Southwest

Average Temperature Rankings, April 2005

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
April 2005
1-Month 		57.7°F
(14.3°C)		 55.3°F
(12.9°C)		 2.4°F
(1.4°C)		 97th Coolest
Coolest since:
 1907
32nd Warmest
Warmest since:
 1896
Ties: 1929
Mar–Apr 2005
2-Month 		50.7°F
(10.4°C)		 50.0°F
(10.0°C)		 0.7°F
(0.4°C)		 74th Coolest
Coolest since:
 1960
55th Warmest
Warmest since:
 2012
Feb–Apr 2005
3-Month 		47.5°F
(8.6°C)		 44.9°F
(7.2°C)		 2.6°F
(1.4°C)		 105th Coolest
Coolest since:
 1899
24th Warmest
Warmest since:
 2012
Ties: 1987
Jan–Apr 2005
4-Month 		44.8°F
(7.1°C)		 41.5°F
(5.3°C)		 3.3°F
(1.8°C)		 114th Coolest
Coolest since:
 1978
15th Warmest
Warmest since:
 2012
Dec 2004–Apr 2005
5-Month 		42.7°F
(5.9°C)		 40.1°F
(4.5°C)		 2.6°F
(1.4°C)		 111th Coolest
Coolest since:
 1978
17th Warmest
Warmest since:
 2012
Ties: 1999
Nov 2004–Apr 2005
6-Month 		43.9°F
(6.6°C)		 40.9°F
(4.9°C)		 3.0°F
(1.7°C)		 118th Coolest
Coolest since:
 1912
10th Warmest
Warmest since:
 2012
Oct 2004–Apr 2005
7-Month 		46.1°F
(7.8°C)		 43.2°F
(6.2°C)		 2.9°F
(1.6°C)		 118th Coolest
Coolest since:
 1899, 1978
10th Warmest
Warmest since:
 2012
Ties: 1999
Sep 2004–Apr 2005
8-Month 		49.0°F
(9.4°C)		 46.5°F
(8.1°C)		 2.5°F
(1.3°C)		 119th Coolest
Coolest since:
 1918
9th Warmest
Warmest since:
 2017
Ties: 1954
Aug 2004–Apr 2005
9-Month 		51.5°F
(10.8°C)		 49.8°F
(9.9°C)		 1.7°F
(0.9°C)		 108th Coolest
Coolest since:
 1918
20th Warmest
Warmest since:
 2017
Ties: 1946, 1991, 2008
Jul 2004–Apr 2005
10-Month 		53.9°F
(12.2°C)		 52.6°F
(11.4°C)		 1.3°F
(0.8°C)		 105th Coolest
Coolest since:
 1918
23rd Warmest
Warmest since:
 2012
Ties: 1922, 1946, 1972, 2008
Jun 2004–Apr 2005
11-Month 		55.6°F
(13.1°C)		 54.5°F
(12.5°C)		 1.1°F
(0.6°C)		 97th Coolest
Coolest since:
 1918
31st Warmest
Warmest since:
 2012, 2017
Ties: 1957
May 2004–Apr 2005
12-Month 		56.7°F
(13.7°C)		 55.4°F
(13.0°C)		 1.3°F
(0.7°C)		 102nd Coolest
Coolest since:
 1918
26th Warmest
Warmest since:
 2012, 2017
Ties: 1934, 1953, 1974, 2013
Nov 2003–Apr 2005
18-Month 		52.3°F
(11.3°C)		 50.5°F
(10.3°C)		 1.8°F
(1.0°C)		 112th Coolest
Coolest since:
 1905, 1979
15th Warmest
Warmest since:
 2017
Ties: 1935, 1939, 2007
May 2003–Apr 2005
24-Month 		56.4°F
(13.6°C)		 55.4°F
(13.0°C)		 1.0°F
(0.6°C)		 102nd Coolest
Coolest since:
 1978
25th Warmest
Warmest since:
 2017
Ties: 2003, 2019
May 2002–Apr 2005
36-Month 		56.1°F
(13.4°C)		 55.4°F
(13.0°C)		 0.7°F
(0.4°C)		 95th Coolest
Coolest since:
 1979
31st Warmest
Warmest since:
 2018
Ties: 1921, 1943, 1988
May 2001–Apr 2005
48-Month 		56.4°F
(13.6°C)		 55.3°F
(12.9°C)		 1.1°F
(0.7°C)		 103rd Coolest
Coolest since:
 1980
22nd Warmest
Warmest since:
 2019
Ties: 1933, 1992, 2003
May 2000–Apr 2005
60-Month 		56.1°F
(13.4°C)		 55.3°F
(12.9°C)		 0.8°F
(0.5°C)		 92nd Coolest
Coolest since:
 1980, 1981
32nd Warmest
Warmest since:
 2020
Ties: 1925, 1937, 1941, 1955, 1991, 2000, 2011

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