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 2009

View Period (Months):
Download: CSV JSON XML
  • Record Coolest
  • Bottom ⅒
  • Bottom ⅓
  • Normal
  • Top ⅓
  • Top ⅒
  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
April 2009
1-Month 		55.3°F
(12.9°C)		 55.3°F
(12.9°C)		 0.0°F
(0.0°C)		 58th Coolest
Coolest since:
 1907
71st Warmest
Warmest since:
 1896
Ties: 1947, 1958
Mar–Apr 2009
2-Month 		52.1°F
(11.2°C)		 50.0°F
(10.0°C)		 2.1°F
(1.2°C)		 98th Coolest
Coolest since:
 1960
31st Warmest
Warmest since:
 2012
Ties: 1954
Feb–Apr 2009
3-Month 		47.4°F
(8.6°C)		 44.9°F
(7.2°C)		 2.5°F
(1.4°C)		 103rd Coolest
Coolest since:
 1899
26th Warmest
Warmest since:
 2012
Jan–Apr 2009
4-Month 		42.6°F
(5.9°C)		 41.5°F
(5.3°C)		 1.1°F
(0.6°C)		 83rd Coolest
Coolest since:
 1978
46th Warmest
Warmest since:
 2012
Ties: 1995, 2011
Dec 2008–Apr 2009
5-Month 		40.8°F
(4.9°C)		 40.1°F
(4.5°C)		 0.7°F
(0.4°C)		 72nd Coolest
Coolest since:
 1978
56th Warmest
Warmest since:
 2012
Ties: 1911
Nov 2008–Apr 2009
6-Month 		41.3°F
(5.2°C)		 40.9°F
(4.9°C)		 0.4°F
(0.3°C)		 72nd Coolest
Coolest since:
 1912
56th Warmest
Warmest since:
 2012
Ties: 1923, 1927, 1934, 1945, 2019
Oct 2008–Apr 2009
7-Month 		43.5°F
(6.4°C)		 43.2°F
(6.2°C)		 0.3°F
(0.2°C)		 62nd Coolest
Coolest since:
 1899, 1978
66th Warmest
Warmest since:
 2012
Ties: 1934, 1947
Sep 2008–Apr 2009
8-Month 		46.8°F
(8.2°C)		 46.5°F
(8.1°C)		 0.3°F
(0.1°C)		 69th Coolest
Coolest since:
 1918
59th Warmest
Warmest since:
 2017
Ties: 1901, 1914, 1966
Aug 2008–Apr 2009
9-Month 		49.9°F
(9.9°C)		 49.8°F
(9.9°C)		 0.1°F
(0.0°C)		 61st Coolest
Coolest since:
 1918
67th Warmest
Warmest since:
 2017
Ties: 1896, 1908, 1966
Jul 2008–Apr 2009
10-Month 		52.6°F
(11.4°C)		 52.6°F
(11.4°C)		 0.0°F
(0.0°C)		 55th Coolest
Coolest since:
 1918
73rd Warmest
Warmest since:
 2012
Ties: 1903, 1985, 1988
Jun 2008–Apr 2009
11-Month 		54.7°F
(12.6°C)		 54.5°F
(12.5°C)		 0.2°F
(0.1°C)		 62nd Coolest
Coolest since:
 1918
66th Warmest
Warmest since:
 2012, 2017
May 2008–Apr 2009
12-Month 		55.4°F
(13.0°C)		 55.4°F
(13.0°C)		 0.0°F
(0.0°C)		 54th Coolest
Coolest since:
 1918
74th Warmest
Warmest since:
 2012, 2017
Ties: 1897, 1900, 1956, 1985, 1990
Nov 2007–Apr 2009
18-Month 		50.6°F
(10.3°C)		 50.5°F
(10.3°C)		 0.1°F
(0.0°C)		 58th Coolest
Coolest since:
 1905, 1979
69th Warmest
Warmest since:
 2017
Ties: 1925, 1926, 1948, 1998
May 2007–Apr 2009
24-Month 		56.2°F
(13.4°C)		 55.4°F
(13.0°C)		 0.8°F
(0.4°C)		 94th Coolest
Coolest since:
 1978
33rd Warmest
Warmest since:
 2017
Ties: 1915
May 2006–Apr 2009
36-Month 		56.2°F
(13.4°C)		 55.4°F
(13.0°C)		 0.8°F
(0.4°C)		 98th Coolest
Coolest since:
 1979
28th Warmest
Warmest since:
 2018
Ties: 1989, 1999
May 2005–Apr 2009
48-Month 		56.6°F
(13.7°C)		 55.3°F
(12.9°C)		 1.3°F
(0.8°C)		 109th Coolest
Coolest since:
 1980
16th Warmest
Warmest since:
 2019
Ties: 2000, 2001, 2006
May 2004–Apr 2009
60-Month 		56.7°F
(13.7°C)		 55.3°F
(12.9°C)		 1.4°F
(0.8°C)		 117th Coolest
Coolest since:
 1980, 1981
7th Warmest
Warmest since:
 2020
Ties: 2002, 2003, 2006, 2012, 2013

Citing This Page