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 1978

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
April 1978
1-Month 		57.3°F
(14.1°C)		 55.3°F
(12.9°C)		 2.0°F
(1.2°C)		 91st Coolest
Coolest since:
 1907
38th Warmest
Warmest since:
 1896
Ties: 1922
Mar–Apr 1978
2-Month 		48.0°F
(8.9°C)		 50.0°F
(10.0°C)		 -2.0°F
(-1.1°C)		 33rd Coolest
Coolest since:
 1926, 1960
96th Warmest
Warmest since:
 2012
Ties: 1923
Feb–Apr 1978
3-Month 		39.2°F
(4.0°C)		 44.9°F
(7.2°C)		 -5.7°F
(-3.2°C)		 2nd Coolest
Coolest since:
 1899
127th Warmest
Warmest since:
 2012
Jan–Apr 1978
4-Month 		34.7°F
(1.5°C)		 41.5°F
(5.3°C)		 -6.8°F
(-3.8°C)		 1st Coolest
Coolest since:
 1978
128th Warmest
Warmest since:
 2012
Dec 1977–Apr 1978
5-Month 		34.1°F
(1.2°C)		 40.0°F
(4.4°C)		 -5.9°F
(-3.2°C)		 1st Coolest
Coolest since:
 1978
127th Warmest
Warmest since:
 2012
Nov 1977–Apr 1978
6-Month 		36.1°F
(2.3°C)		 40.8°F
(4.9°C)		 -4.7°F
(-2.6°C)		 2nd Coolest
Coolest since:
 1912
126th Warmest
Warmest since:
 2012
Oct 1977–Apr 1978
7-Month 		38.8°F
(3.8°C)		 43.2°F
(6.2°C)		 -4.4°F
(-2.4°C)		 1st Coolest
Coolest since:
 1899, 1978
127th Warmest
Warmest since:
 2012
Ties: 1899
Sep 1977–Apr 1978
8-Month 		42.8°F
(6.0°C)		 46.5°F
(8.1°C)		 -3.7°F
(-2.1°C)		 2nd Coolest
Coolest since:
 1918
126th Warmest
Warmest since:
 2017
Aug 1977–Apr 1978
9-Month 		46.4°F
(8.0°C)		 49.7°F
(9.8°C)		 -3.3°F
(-1.8°C)		 2nd Coolest
Coolest since:
 1918
126th Warmest
Warmest since:
 2017
Ties: 1977
Jul 1977–Apr 1978
10-Month 		49.8°F
(9.9°C)		 52.6°F
(11.4°C)		 -2.8°F
(-1.5°C)		 4th Coolest
Coolest since:
 1918
124th Warmest
Warmest since:
 2012
Jun 1977–Apr 1978
11-Month 		52.0°F
(11.1°C)		 54.5°F
(12.5°C)		 -2.5°F
(-1.4°C)		 5th Coolest
Coolest since:
 1918
123rd Warmest
Warmest since:
 2012, 2017
May 1977–Apr 1978
12-Month 		53.5°F
(11.9°C)		 55.4°F
(13.0°C)		 -1.9°F
(-1.1°C)		 10th Coolest
Coolest since:
 1918
118th Warmest
Warmest since:
 2012, 2017
Ties: 1982
Nov 1976–Apr 1978
18-Month 		48.3°F
(9.1°C)		 50.5°F
(10.3°C)		 -2.2°F
(-1.2°C)		 4th Coolest
Coolest since:
 1979
123rd Warmest
Warmest since:
 2017
May 1976–Apr 1978
24-Month 		52.8°F
(11.6°C)		 55.3°F
(12.9°C)		 -2.5°F
(-1.3°C)		 1st Coolest
Coolest since:
 1978
126th Warmest
Warmest since:
 2017
May 1975–Apr 1978
36-Month 		54.2°F
(12.3°C)		 55.4°F
(13.0°C)		 -1.2°F
(-0.7°C)		 7th Coolest
Coolest since:
 1979
119th Warmest
Warmest since:
 2018
May 1974–Apr 1978
48-Month 		54.2°F
(12.3°C)		 55.3°F
(12.9°C)		 -1.1°F
(-0.6°C)		 7th Coolest
Coolest since:
 1980
118th Warmest
Warmest since:
 2019
Ties: 1970
May 1973–Apr 1978
60-Month 		54.7°F
(12.6°C)		 55.3°F
(12.9°C)		 -0.6°F
(-0.3°C)		 14th Coolest
Coolest since:
 1980, 1981
110th Warmest
Warmest since:
 2020
Ties: 1963, 1983

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