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 1939

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
December 1939
1-Month
34.0°F
(1.1°C)
28.3°F
(-2.1°C)
5.7°F
(3.2°C)
111th Coolest
Coolest since:
1983
18th Warmest
Warmest since:
2015
Ties: 1971
Nov–Dec 1939
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: 1990, 2009
Oct–Dec 1939
3-Month
43.6°F
(6.4°C)
41.0°F
(5.0°C)
2.6°F
(1.4°C)
105th Coolest
Coolest since:
1976
24th Warmest
Warmest since:
1931
Sep–Dec 1939
4-Month
50.3°F
(10.2°C)
47.3°F
(8.5°C)
3.0°F
(1.7°C)
119th Coolest
Coolest since:
1976
10th Warmest
Warmest since:
1931
Ties: 1913
Aug–Dec 1939
5-Month
54.7°F
(12.6°C)
52.5°F
(11.4°C)
2.2°F
(1.2°C)
113th Coolest
Coolest since:
1976
16th Warmest
Warmest since:
1931
Jul–Dec 1939
6-Month
58.4°F
(14.7°C)
56.5°F
(13.6°C)
1.9°F
(1.1°C)
114th Coolest
Coolest since:
1976
15th Warmest
Warmest since:
1931
Jun–Dec 1939
7-Month
60.4°F
(15.8°C)
58.6°F
(14.8°C)
1.8°F
(1.0°C)
111th Coolest
Coolest since:
1976
18th Warmest
Warmest since:
1931
May–Dec 1939
8-Month
61.1°F
(16.2°C)
59.1°F
(15.1°C)
2.0°F
(1.1°C)
118th Coolest
Coolest since:
1917
11th Warmest
Warmest since:
1931
Ties: 1921, 1987, 2007
Apr–Dec 1939
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, 1999, 2011
Mar–Dec 1939
10-Month
57.9°F
(14.4°C)
56.3°F
(13.5°C)
1.6°F
(0.9°C)
110th Coolest
Coolest since:
1917
19th Warmest
Warmest since:
2012
Feb–Dec 1939
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, 2006, 2007, 2010, 2011
Jan–Dec 1939
12-Month
53.2°F
(11.8°C)
51.2°F
(10.7°C)
2.0°F
(1.1°C)
112th Coolest
Coolest since:
1917
17th Warmest
Warmest since:
2012
Jul 1938–Dec 1939
18-Month
55.2°F
(12.9°C)
53.0°F
(11.7°C)
2.2°F
(1.2°C)
122nd Coolest
Coolest since:
1904
6th Warmest
Warmest since:
2012
Jan 1938–Dec 1939
24-Month
53.6°F
(12.0°C)
51.2°F
(10.7°C)
2.4°F
(1.3°C)
123rd Coolest
Coolest since:
1979
5th Warmest
Warmest since:
2017
Ties: 2012
Jan 1937–Dec 1939
36-Month
52.4°F
(11.3°C)
51.2°F
(10.7°C)
1.2°F
(0.6°C)
106th Coolest
Coolest since:
1905
21st Warmest
Warmest since:
2017
Ties: 1921, 1992
Jan 1936–Dec 1939
48-Month
52.3°F
(11.3°C)
51.2°F
(10.7°C)
1.1°F
(0.6°C)
107th Coolest
Coolest since:
1905
19th Warmest
Warmest since:
1934
Ties: 1935, 1957, 2020
Jan 1935–Dec 1939
60-Month
52.0°F
(11.1°C)
51.2°F
(10.7°C)
0.8°F
(0.4°C)
100th Coolest
Coolest since:
1905
25th Warmest
Warmest since:
1934
Ties: 1931, 1932, 1938, 1955, 2004, 2012, 2013, 2016

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