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 1940

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Warmest/Coolest
Since		Record
April 1940
1-Month		53.9°F
(12.2°C)		55.3°F
(12.9°C)		-1.4°F
(-0.7°C)		39th Coolest
Coolest since:
1907
91st Warmest
Warmest since:
1896
Mar–Apr 1940
2-Month		48.4°F
(9.1°C)		50.0°F
(10.0°C)		-1.6°F
(-0.9°C)		37th Coolest
Coolest since:
1960
93rd Warmest
Warmest since:
2012
Feb–Apr 1940
3-Month		43.3°F
(6.3°C)		44.9°F
(7.2°C)		-1.6°F
(-0.9°C)		35th Coolest
Coolest since:
1899
95th Warmest
Warmest since:
2012
Ties: 1941, 2013
Jan–Apr 1940
4-Month		36.7°F
(2.6°C)		41.5°F
(5.3°C)		-4.8°F
(-2.7°C)		5th Coolest
Coolest since:
1978
125th Warmest
Warmest since:
2012
Dec 1939–Apr 1940
5-Month		36.8°F
(2.7°C)		40.1°F
(4.5°C)		-3.3°F
(-1.8°C)		10th Coolest
Coolest since:
1978
119th Warmest
Warmest since:
2012
Ties: 2014
Nov 1939–Apr 1940
6-Month		37.7°F
(3.2°C)		40.9°F
(4.9°C)		-3.2°F
(-1.7°C)		9th Coolest
Coolest since:
1912
120th Warmest
Warmest since:
2012
Oct 1939–Apr 1940
7-Month		40.9°F
(4.9°C)		43.2°F
(6.2°C)		-2.3°F
(-1.3°C)		13th Coolest
Coolest since:
1899, 1978
116th Warmest
Warmest since:
2012
Sep 1939–Apr 1940
8-Month		45.2°F
(7.3°C)		46.5°F
(8.1°C)		-1.3°F
(-0.8°C)		24th Coolest
Coolest since:
1918
105th Warmest
Warmest since:
2017
Ties: 1920, 1993
Aug 1939–Apr 1940
9-Month		48.5°F
(9.2°C)		49.8°F
(9.9°C)		-1.3°F
(-0.7°C)		19th Coolest
Coolest since:
1918
110th Warmest
Warmest since:
2017
Ties: 1920, 1960, 1963
Jul 1939–Apr 1940
10-Month		51.4°F
(10.8°C)		52.6°F
(11.4°C)		-1.2°F
(-0.6°C)		22nd Coolest
Coolest since:
1918
107th Warmest
Warmest since:
2012
Ties: 1969
Jun 1939–Apr 1940
11-Month		53.5°F
(11.9°C)		54.5°F
(12.5°C)		-1.0°F
(-0.6°C)		23rd Coolest
Coolest since:
1918
106th Warmest
Warmest since:
2012, 2017
Ties: 1902, 1969, 1996
May 1939–Apr 1940
12-Month		54.7°F
(12.6°C)		55.4°F
(13.0°C)		-0.7°F
(-0.4°C)		31st Coolest
Coolest since:
1918
98th Warmest
Warmest since:
2012, 2017
Ties: 1906, 1908, 1928, 1960
Nov 1938–Apr 1940
18-Month		50.5°F
(10.3°C)		50.5°F
(10.3°C)		0.0°F
(0.0°C)		53rd Coolest
Coolest since:
1905, 1979
75th Warmest
Warmest since:
2017
Ties: 1901, 1944, 1975, 2010
May 1938–Apr 1940
24-Month		55.8°F
(13.2°C)		55.4°F
(13.0°C)		0.4°F
(0.2°C)		82nd Coolest
Coolest since:
1978
46th Warmest
Warmest since:
2017
Ties: 1910, 1945, 1974
May 1937–Apr 1940
36-Month		56.0°F
(13.3°C)		55.4°F
(13.0°C)		0.6°F
(0.3°C)		91st Coolest
Coolest since:
1979
36th Warmest
Warmest since:
2018
Ties: 1922, 1924, 1944, 1974
May 1936–Apr 1940
48-Month		56.2°F
(13.4°C)		55.3°F
(12.9°C)		0.9°F
(0.5°C)		99th Coolest
Coolest since:
1980
27th Warmest
Warmest since:
2019
Ties: 1922, 1924, 1942
May 1935–Apr 1940
60-Month		55.6°F
(13.1°C)		55.3°F
(12.9°C)		0.3°F
(0.2°C)		70th Coolest
Coolest since:
1980, 1981
55th Warmest
Warmest since:
2020
Ties: 1926, 1944, 1948, 1949, 1950, 1959, 1994

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