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 3. West

Average Temperature Rankings, December 2011

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 2011
1-Month		34.1°F
(1.2°C)		28.3°F
(-2.1°C)		5.8°F
(3.3°C)		113th Coolest
Coolest since:
1983
16th Warmest
Warmest since:
2015
Ties: 1998
Nov–Dec 2011
2-Month		39.2°F
(4.0°C)		34.3°F
(1.3°C)		4.9°F
(2.7°C)		118th Coolest
Coolest since:
2000
11th Warmest
Warmest since:
1931
Oct–Dec 2011
3-Month		44.6°F
(7.0°C)		41.0°F
(5.0°C)		3.6°F
(2.0°C)		116th Coolest
Coolest since:
1976
13th Warmest
Warmest since:
1931
Ties: 1999
Sep–Dec 2011
4-Month		49.2°F
(9.6°C)		47.3°F
(8.5°C)		1.9°F
(1.1°C)		108th Coolest
Coolest since:
1976
21st Warmest
Warmest since:
1931
Ties: 1933, 2004
Aug–Dec 2011
5-Month		54.4°F
(12.4°C)		52.5°F
(11.4°C)		1.9°F
(1.0°C)		110th Coolest
Coolest since:
1976
19th Warmest
Warmest since:
1931
Ties: 1922
Jul–Dec 2011
6-Month		58.7°F
(14.8°C)		56.5°F
(13.6°C)		2.2°F
(1.2°C)		116th Coolest
Coolest since:
1976
13th Warmest
Warmest since:
1931
Jun–Dec 2011
7-Month		60.5°F
(15.8°C)		58.6°F
(14.8°C)		1.9°F
(1.0°C)		113th Coolest
Coolest since:
1976
16th Warmest
Warmest since:
1931
Ties: 2001
May–Dec 2011
8-Month		60.7°F
(15.9°C)		59.1°F
(15.1°C)		1.6°F
(0.8°C)		108th Coolest
Coolest since:
1917
21st Warmest
Warmest since:
1931
Ties: 1922, 2012
Apr–Dec 2011
9-Month		59.7°F
(15.4°C)		58.2°F
(14.6°C)		1.5°F
(0.8°C)		106th Coolest
Coolest since:
1917
23rd Warmest
Warmest since:
1931
Ties: 1922, 1939, 1999
Mar–Dec 2011
10-Month		57.8°F
(14.3°C)		56.3°F
(13.5°C)		1.5°F
(0.8°C)		109th Coolest
Coolest since:
1917
20th Warmest
Warmest since:
2012
Ties: 1922, 1933, 1953
Feb–Dec 2011
11-Month		55.1°F
(12.8°C)		53.7°F
(12.1°C)		1.4°F
(0.7°C)		108th Coolest
Coolest since:
1917
21st Warmest
Warmest since:
2012
Ties: 1936, 1939, 2006, 2007, 2010
Jan–Dec 2011
12-Month		52.2°F
(11.2°C)		51.2°F
(10.7°C)		1.0°F
(0.5°C)		95th Coolest
Coolest since:
1917
34th Warmest
Warmest since:
2012
Ties: 1964, 1986
Jul 2010–Dec 2011
18-Month		53.9°F
(12.2°C)		53.0°F
(11.7°C)		0.9°F
(0.5°C)		99th Coolest
Coolest since:
1904
29th Warmest
Warmest since:
2012
Ties: 1933, 1948, 1956, 2022
Jan 2010–Dec 2011
24-Month		52.1°F
(11.2°C)		51.2°F
(10.7°C)		0.9°F
(0.5°C)		96th Coolest
Coolest since:
1979
32nd Warmest
Warmest since:
2017
Ties: 1935, 1938, 1992
Jan 2009–Dec 2011
36-Month		51.6°F
(10.9°C)		51.2°F
(10.7°C)		0.4°F
(0.2°C)		80th Coolest
Coolest since:
1905
47th Warmest
Warmest since:
2017
Ties: 1949, 1953, 1975, 1990
Jan 2008–Dec 2011
48-Month		51.2°F
(10.7°C)		51.2°F
(10.7°C)		0.0°F
(0.0°C)		56th Coolest
Coolest since:
1905
70th Warmest
Warmest since:
1934
Ties: 1959, 1965, 1974, 1976, 1998
Jan 2007–Dec 2011
60-Month		51.5°F
(10.8°C)		51.2°F
(10.7°C)		0.3°F
(0.1°C)		71st Coolest
Coolest since:
1905
54th Warmest
Warmest since:
1934
Ties: 1950, 1954

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