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 1990

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 1990
1-Month		27.9°F
(-2.3°C)		28.3°F
(-2.1°C)		-0.4°F
(-0.2°C)		55th Coolest
Coolest since:
1983
74th Warmest
Warmest since:
2015
Ties: 1996
Nov–Dec 1990
2-Month		37.1°F
(2.8°C)		34.3°F
(1.3°C)		2.8°F
(1.5°C)		101st Coolest
Coolest since:
2000
28th Warmest
Warmest since:
1931
Ties: 1939, 2009
Oct–Dec 1990
3-Month		42.3°F
(5.7°C)		41.0°F
(5.0°C)		1.3°F
(0.7°C)		85th Coolest
Coolest since:
1976
44th Warmest
Warmest since:
1931
Ties: 1902
Sep–Dec 1990
4-Month		48.7°F
(9.3°C)		47.3°F
(8.5°C)		1.4°F
(0.8°C)		93rd Coolest
Coolest since:
1976
36th Warmest
Warmest since:
1931
Ties: 1923, 1948, 1975
Aug–Dec 1990
5-Month		53.6°F
(12.0°C)		52.5°F
(11.4°C)		1.1°F
(0.6°C)		92nd Coolest
Coolest since:
1976
37th Warmest
Warmest since:
1931
Ties: 1908, 1923, 1973
Jul–Dec 1990
6-Month		57.1°F
(13.9°C)		56.5°F
(13.6°C)		0.6°F
(0.3°C)		76th Coolest
Coolest since:
1976
53rd Warmest
Warmest since:
1931
Ties: 1897, 1920
Jun–Dec 1990
7-Month		59.2°F
(15.1°C)		58.6°F
(14.8°C)		0.6°F
(0.3°C)		78th Coolest
Coolest since:
1976
51st Warmest
Warmest since:
1931
Ties: 1920, 1952, 2017
May–Dec 1990
8-Month		59.1°F
(15.1°C)		59.1°F
(15.1°C)		0.0°F
(0.0°C)		55th Coolest
Coolest since:
1917
74th Warmest
Warmest since:
1931
Ties: 1977, 2003
Apr–Dec 1990
9-Month		58.1°F
(14.5°C)		58.2°F
(14.6°C)		-0.1°F
(-0.1°C)		50th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
1931
Ties: 1942, 1960, 1979, 1982
Mar–Dec 1990
10-Month		56.7°F
(13.7°C)		56.3°F
(13.5°C)		0.4°F
(0.2°C)		78th Coolest
Coolest since:
1917
51st Warmest
Warmest since:
2012
Ties: 1896, 1905, 2022
Feb–Dec 1990
11-Month		54.7°F
(12.6°C)		53.7°F
(12.1°C)		1.0°F
(0.5°C)		95th Coolest
Coolest since:
1917
34th Warmest
Warmest since:
2012
Ties: 1949
Jan–Dec 1990
12-Month		53.0°F
(11.7°C)		51.2°F
(10.7°C)		1.8°F
(1.0°C)		111th Coolest
Coolest since:
1917
18th Warmest
Warmest since:
2012
Jul 1989–Dec 1990
18-Month		53.4°F
(11.9°C)		53.0°F
(11.7°C)		0.4°F
(0.2°C)		82nd Coolest
Coolest since:
1904
46th Warmest
Warmest since:
2012
Ties: 1911, 1930, 1937
Jan 1989–Dec 1990
24-Month		51.5°F
(10.8°C)		51.2°F
(10.7°C)		0.3°F
(0.1°C)		79th Coolest
Coolest since:
1979
49th Warmest
Warmest since:
2017
Ties: 1928, 1964, 1984, 2019
Jan 1988–Dec 1990
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, 2011
Jan 1987–Dec 1990
48-Month		52.2°F
(11.2°C)		51.2°F
(10.7°C)		1.0°F
(0.5°C)		103rd Coolest
Coolest since:
1905
23rd Warmest
Warmest since:
1934
Ties: 2005, 2017
Jan 1986–Dec 1990
60-Month		52.2°F
(11.2°C)		51.2°F
(10.7°C)		1.0°F
(0.5°C)		108th Coolest
Coolest since:
1905
17th Warmest
Warmest since:
1934
Ties: 1922, 1923, 1936, 1941, 2003

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