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 2015

View Period (Months):
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  • Record Coolest
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 2015
1-Month
39.4°F
(4.1°C)
28.3°F
(-2.1°C)
11.1°F
(6.2°C)
128th Coolest
Coolest since:
1983
1st Warmest
Warmest to Date
2015
Nov–Dec 2015
2-Month
42.6°F
(5.9°C)
34.2°F
(1.2°C)
8.4°F
(4.7°C)
127th Coolest
Coolest since:
2000
2nd Warmest
Warmest since:
1931
Ties: 2001
Oct–Dec 2015
3-Month
46.9°F
(8.3°C)
41.0°F
(5.0°C)
5.9°F
(3.3°C)
127th Coolest
Coolest since:
1976
2nd Warmest
Warmest since:
1931
Sep–Dec 2015
4-Month
52.9°F
(11.6°C)
47.2°F
(8.4°C)
5.7°F
(3.2°C)
127th Coolest
Coolest since:
1976
2nd Warmest
Warmest since:
1931
Aug–Dec 2015
5-Month
56.6°F
(13.7°C)
52.5°F
(11.4°C)
4.1°F
(2.3°C)
127th Coolest
Coolest since:
1976
2nd Warmest
Warmest since:
1931
Ties: 2021
Jul–Dec 2015
6-Month
59.5°F
(15.3°C)
56.5°F
(13.6°C)
3.0°F
(1.7°C)
124th Coolest
Coolest since:
1976
5th Warmest
Warmest since:
1931
Jun–Dec 2015
7-Month
61.2°F
(16.2°C)
58.6°F
(14.8°C)
2.6°F
(1.4°C)
120th Coolest
Coolest since:
1976
9th Warmest
Warmest since:
1931
May–Dec 2015
8-Month
61.6°F
(16.4°C)
59.1°F
(15.1°C)
2.5°F
(1.3°C)
122nd Coolest
Coolest since:
1917
7th Warmest
Warmest since:
1931
Ties: 2016
Apr–Dec 2015
9-Month
60.8°F
(16.0°C)
58.2°F
(14.6°C)
2.6°F
(1.4°C)
124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
1931
Mar–Dec 2015
10-Month
58.6°F
(14.8°C)
56.3°F
(13.5°C)
2.3°F
(1.3°C)
119th Coolest
Coolest since:
1917
10th Warmest
Warmest since:
2012
Ties: 1934, 2007
Feb–Dec 2015
11-Month
54.9°F
(12.7°C)
53.7°F
(12.1°C)
1.2°F
(0.6°C)
100th Coolest
Coolest since:
1917
29th Warmest
Warmest since:
2012
Ties: 1918, 1933, 1977
Jan–Dec 2015
12-Month
52.4°F
(11.3°C)
51.3°F
(10.7°C)
1.1°F
(0.6°C)
101st Coolest
Coolest since:
1917
28th Warmest
Warmest since:
2012
Ties: 1911, 1956, 2020
Jul 2014–Dec 2015
18-Month
53.1°F
(11.7°C)
53.0°F
(11.7°C)
0.1°F
(0.0°C)
69th Coolest
Coolest since:
1904
59th Warmest
Warmest since:
2012
Ties: 1928, 1974
Jan 2014–Dec 2015
24-Month
50.5°F
(10.3°C)
51.3°F
(10.7°C)
-0.8°F
(-0.4°C)
22nd Coolest
Coolest since:
1979
106th Warmest
Warmest since:
2017
Ties: 1899, 1906, 1929, 1959, 1960, 1962
Jan 2013–Dec 2015
36-Month
50.4°F
(10.2°C)
51.2°F
(10.7°C)
-0.8°F
(-0.5°C)
19th Coolest
Coolest since:
1905
108th Warmest
Warmest since:
2017
Ties: 1970
Jan 2012–Dec 2015
48-Month
51.5°F
(10.8°C)
51.2°F
(10.7°C)
0.3°F
(0.1°C)
75th Coolest
Coolest since:
1905
51st Warmest
Warmest since:
1934
Ties: 1916, 1948, 2014
Jan 2011–Dec 2015
60-Month
51.7°F
(10.9°C)
51.2°F
(10.7°C)
0.5°F
(0.2°C)
80th Coolest
Coolest since:
1905
45th Warmest
Warmest since:
1934
Ties: 1924, 1943, 1949, 1994

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