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 1901

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Warmest/Coolest
Since		Record
April 1901
1-Month		51.4°F
(10.8°C)		55.3°F
(12.9°C)		-3.9°F
(-2.1°C)		14th Coolest
Coolest to Date
1907
116th Warmest
Warmest since:
1896
Mar–Apr 1901
2-Month		47.5°F
(8.6°C)		50.0°F
(10.0°C)		-2.5°F
(-1.4°C)		22nd Coolest
Coolest since:
1960
108th Warmest
Warmest since:
2012
Ties: 1931, 1965
Feb–Apr 1901
3-Month		41.4°F
(5.2°C)		44.9°F
(7.2°C)		-3.5°F
(-2.0°C)		13th Coolest
Coolest since:
1899
117th Warmest
Warmest since:
2012
Ties: 1906
Jan–Apr 1901
4-Month		39.8°F
(4.3°C)		41.5°F
(5.3°C)		-1.7°F
(-1.0°C)		26th Coolest
Coolest since:
1978
104th Warmest
Warmest since:
2012
Dec 1900–Apr 1901
5-Month		38.9°F
(3.8°C)		40.1°F
(4.5°C)		-1.2°F
(-0.7°C)		30th Coolest
Coolest since:
1978
99th Warmest
Warmest since:
2012
Ties: 1906
Nov 1900–Apr 1901
6-Month		39.8°F
(4.3°C)		40.9°F
(4.9°C)		-1.1°F
(-0.6°C)		29th Coolest
Coolest since:
1912
100th Warmest
Warmest since:
2012
Ties: 1993
Oct 1900–Apr 1901
7-Month		43.0°F
(6.1°C)		43.2°F
(6.2°C)		-0.2°F
(-0.1°C)		46th Coolest
Coolest since:
1899, 1978
83rd Warmest
Warmest since:
2012
Ties: 1897, 1917, 1959, 1975, 1988
Sep 1900–Apr 1901
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
60th Warmest
Warmest since:
2017
Ties: 1914, 1966, 2009
Aug 1900–Apr 1901
9-Month		50.6°F
(10.3°C)		49.8°F
(9.9°C)		0.8°F
(0.4°C)		87th Coolest
Coolest since:
1918
42nd Warmest
Warmest since:
2017
Ties: 2011
Jul 1900–Apr 1901
10-Month		53.2°F
(11.8°C)		52.6°F
(11.4°C)		0.6°F
(0.4°C)		79th Coolest
Coolest since:
1918
50th Warmest
Warmest since:
2012
Ties: 1948, 1967, 1986
Jun 1900–Apr 1901
11-Month		54.9°F
(12.7°C)		54.5°F
(12.5°C)		0.4°F
(0.2°C)		72nd Coolest
Coolest since:
1918
57th Warmest
Warmest since:
2012, 2017
Ties: 1933, 1950
May 1900–Apr 1901
12-Month		55.8°F
(13.2°C)		55.4°F
(13.0°C)		0.4°F
(0.2°C)		77th Coolest
Coolest since:
1918
52nd Warmest
Warmest since:
2012, 2017
Ties: 1903, 1933, 1946, 1986
Nov 1899–Apr 1901
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: 1940, 1944, 1975, 2010
May 1899–Apr 1901
24-Month		55.6°F
(13.1°C)		55.4°F
(13.0°C)		0.2°F
(0.1°C)		70th Coolest
Coolest since:
1978
58th Warmest
Warmest since:
2017
Ties: 1914, 1924, 1949, 1976, 1986
May 1898–Apr 1901
36-Month		54.8°F
(12.7°C)		55.4°F
(13.0°C)		-0.6°F
(-0.3°C)		23rd Coolest
Coolest since:
1979
104th Warmest
Warmest since:
2018
Ties: 1899, 1900, 1952, 1961, 1964, 1982
May 1897–Apr 1901
48-Month		55.1°F
(12.8°C)		55.3°F
(12.9°C)		-0.2°F
(-0.1°C)		38th Coolest
Coolest since:
1980
88th Warmest
Warmest to Date
2019
Ties: 1928, 1931, 1951, 1960, 1973, 1984, 1997
May 1896–Apr 1901
60-Month		55.1°F
(12.8°C)		55.3°F
(12.9°C)		-0.2°F
(-0.1°C)		39th Coolest
Coolest since:
1980, 1981
86th Warmest
Warmest to Date
2020
Ties: 1915, 1928, 1951, 1952, 1960, 1966, 1968

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