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 2009

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 2009
1-Month
27.4°F
(-2.6°C)
28.3°F
(-2.1°C)
-0.9°F
(-0.5°C)
53rd Coolest
Coolest since:
1983
76th Warmest
Warmest since:
2015
Nov–Dec 2009
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, 1990
Oct–Dec 2009
3-Month
40.9°F
(4.9°C)
41.0°F
(5.0°C)
-0.1°F
(-0.1°C)
60th Coolest
Coolest since:
1976
69th Warmest
Warmest since:
1931
Ties: 1952
Sep–Dec 2009
4-Month
47.0°F
(8.3°C)
47.3°F
(8.5°C)
-0.3°F
(-0.2°C)
52nd Coolest
Coolest since:
1976
77th Warmest
Warmest since:
1931
Ties: 1902
Aug–Dec 2009
5-Month
51.7°F
(10.9°C)
52.5°F
(11.4°C)
-0.8°F
(-0.5°C)
36th Coolest
Coolest since:
1976
93rd Warmest
Warmest since:
1931
Ties: 1902, 1904, 1909, 1942, 1981
Jul–Dec 2009
6-Month
54.7°F
(12.6°C)
56.5°F
(13.6°C)
-1.8°F
(-1.0°C)
18th Coolest
Coolest since:
1976
111th Warmest
Warmest since:
1931
Jun–Dec 2009
7-Month
57.2°F
(14.0°C)
58.6°F
(14.8°C)
-1.4°F
(-0.8°C)
21st Coolest
Coolest since:
1976
108th Warmest
Warmest since:
1931
Ties: 1974, 1993, 2014
May–Dec 2009
8-Month
57.9°F
(14.4°C)
59.1°F
(15.1°C)
-1.2°F
(-0.7°C)
26th Coolest
Coolest since:
1917
103rd Warmest
Warmest since:
1931
Ties: 1909, 1926
Apr–Dec 2009
9-Month
57.1°F
(13.9°C)
58.2°F
(14.6°C)
-1.1°F
(-0.7°C)
28th Coolest
Coolest since:
1917
101st Warmest
Warmest since:
1931
Ties: 1995, 2013
Mar–Dec 2009
10-Month
55.6°F
(13.1°C)
56.3°F
(13.5°C)
-0.7°F
(-0.4°C)
33rd Coolest
Coolest since:
1917
96th Warmest
Warmest since:
2012
Ties: 1906, 1929, 1978, 1995
Feb–Dec 2009
11-Month
53.4°F
(11.9°C)
53.7°F
(12.1°C)
-0.3°F
(-0.2°C)
49th Coolest
Coolest since:
1917
80th Warmest
Warmest since:
2012
Ties: 1915, 1980, 1997
Jan–Dec 2009
12-Month
50.6°F
(10.3°C)
51.2°F
(10.7°C)
-0.6°F
(-0.4°C)
39th Coolest
Coolest since:
1917
90th Warmest
Warmest since:
2012
Ties: 1898, 1962, 1995
Jul 2008–Dec 2009
18-Month
52.1°F
(11.2°C)
53.0°F
(11.7°C)
-0.9°F
(-0.5°C)
25th Coolest
Coolest since:
1904
103rd Warmest
Warmest since:
2012
Ties: 1950
Jan 2008–Dec 2009
24-Month
50.3°F
(10.2°C)
51.2°F
(10.7°C)
-0.9°F
(-0.5°C)
17th Coolest
Coolest since:
1979
111th Warmest
Warmest since:
2017
Ties: 1968, 1969, 1970
Jan 2007–Dec 2009
36-Month
51.2°F
(10.7°C)
51.2°F
(10.7°C)
0.0°F
(0.0°C)
68th Coolest
Coolest since:
1905
59th Warmest
Warmest since:
2017
Ties: 1911, 1920, 1930, 1944, 1958, 1964, 1966, 1973, 2014
Jan 2006–Dec 2009
48-Month
51.8°F
(11.0°C)
51.2°F
(10.7°C)
0.6°F
(0.3°C)
84th Coolest
Coolest since:
1905
42nd Warmest
Warmest since:
1934
Ties: 1992, 1993, 1999
Jan 2005–Dec 2009
60-Month
52.1°F
(11.2°C)
51.2°F
(10.7°C)
0.9°F
(0.5°C)
102nd Coolest
Coolest since:
1905
23rd Warmest
Warmest since:
1934
Ties: 2018

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