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 2003

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
April 2003
1-Month 		57.2°F
(14.0°C)		 55.3°F
(12.9°C)		 1.9°F
(1.1°C)		 89th Coolest
Coolest since:
 1907
40th Warmest
Warmest since:
 1896
Ties: 1927
Mar–Apr 2003
2-Month 		51.8°F
(11.0°C)		 50.0°F
(10.0°C)		 1.8°F
(1.0°C)		 92nd Coolest
Coolest since:
 1960
37th Warmest
Warmest since:
 2012
Ties: 1992
Feb–Apr 2003
3-Month 		45.2°F
(7.3°C)		 44.9°F
(7.2°C)		 0.3°F
(0.1°C)		 63rd Coolest
Coolest since:
 1899
66th Warmest
Warmest since:
 2012
Ties: 1972
Jan–Apr 2003
4-Month 		40.8°F
(4.9°C)		 41.5°F
(5.3°C)		 -0.7°F
(-0.4°C)		 46th Coolest
Coolest since:
 1978
83rd Warmest
Warmest since:
 2012
Ties: 1948
Dec 2002–Apr 2003
5-Month 		39.8°F
(4.3°C)		 40.1°F
(4.5°C)		 -0.3°F
(-0.2°C)		 50th Coolest
Coolest since:
 1978
78th Warmest
Warmest since:
 2012
Ties: 1975
Nov 2002–Apr 2003
6-Month 		40.4°F
(4.7°C)		 40.9°F
(4.9°C)		 -0.5°F
(-0.2°C)		 40th Coolest
Coolest since:
 1912
88th Warmest
Warmest since:
 2012
Ties: 1944, 1964, 1997, 2018
Oct 2002–Apr 2003
7-Month 		42.5°F
(5.8°C)		 43.2°F
(6.2°C)		 -0.7°F
(-0.4°C)		 32nd Coolest
Coolest since:
 1899, 1978
96th Warmest
Warmest since:
 2012
Ties: 1956, 1961
Sep 2002–Apr 2003
8-Month 		46.2°F
(7.9°C)		 46.5°F
(8.1°C)		 -0.3°F
(-0.2°C)		 42nd Coolest
Coolest since:
 1918
86th Warmest
Warmest since:
 2017
Ties: 1913, 1956, 1959
Aug 2002–Apr 2003
9-Month 		49.7°F
(9.8°C)		 49.8°F
(9.9°C)		 -0.1°F
(-0.1°C)		 52nd Coolest
Coolest since:
 1918
76th Warmest
Warmest since:
 2017
Ties: 1911, 1928, 1933, 1956, 1961, 2018
Jul 2002–Apr 2003
10-Month 		52.8°F
(11.6°C)		 52.6°F
(11.4°C)		 0.2°F
(0.2°C)		 68th Coolest
Coolest since:
 1918
60th Warmest
Warmest since:
 2012
Ties: 1910, 1933, 1956, 1983
Jun 2002–Apr 2003
11-Month 		55.0°F
(12.8°C)		 54.5°F
(12.5°C)		 0.5°F
(0.3°C)		 77th Coolest
Coolest since:
 1918
51st Warmest
Warmest since:
 2012, 2017
Ties: 1927, 1941, 1948, 1967
May 2002–Apr 2003
12-Month 		55.6°F
(13.1°C)		 55.4°F
(13.0°C)		 0.2°F
(0.1°C)		 70th Coolest
Coolest since:
 1918
58th Warmest
Warmest since:
 2012, 2017
Ties: 1907, 1941, 1948, 1967, 1983, 2018
Nov 2001–Apr 2003
18-Month 		51.9°F
(11.1°C)		 50.5°F
(10.3°C)		 1.4°F
(0.8°C)		 105th Coolest
Coolest since:
 1905, 1979
22nd Warmest
Warmest since:
 2017
May 2001–Apr 2003
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: 2005, 2019
May 2000–Apr 2003
36-Month 		55.9°F
(13.3°C)		 55.4°F
(13.0°C)		 0.5°F
(0.3°C)		 86th Coolest
Coolest since:
 1979
40th Warmest
Warmest since:
 2018
Ties: 1936, 1937, 1942, 1976, 1987, 1990, 1991, 1993
May 1999–Apr 2003
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, 2005
May 1998–Apr 2003
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, 2006, 2009, 2012, 2013

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