Statewide Rankings

Statewide 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

Average Temperature Rankings, October 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
October 2015
1-Month
56.0°F
(13.3°C)
54.6°F
(12.6°C)
1.4°F
(0.7°C)
89th Coolest
Coolest since:
1925
40th Warmest
Warmest since:
1963
Sep–Oct 2015
2-Month
63.2°F
(17.3°C)
60.4°F
(15.8°C)
2.8°F
(1.5°C)
111th Coolest
Coolest since:
1917
18th Warmest
Warmest since:
1897, 2016
Ties: 2005
Aug–Oct 2015
3-Month
66.1°F
(18.9°C)
64.7°F
(18.2°C)
1.4°F
(0.7°C)
101st Coolest
Coolest since:
1917
28th Warmest
Warmest since:
1947
Ties: 1899, 1919
Jul–Oct 2015
4-Month
68.1°F
(20.1°C)
67.4°F
(19.7°C)
0.7°F
(0.4°C)
82nd Coolest
Coolest since:
1917
47th Warmest
Warmest since:
1936
Ties: 1959
Jun–Oct 2015
5-Month
68.8°F
(20.4°C)
68.2°F
(20.1°C)
0.6°F
(0.3°C)
79th Coolest
Coolest since:
1917
50th Warmest
Warmest since:
1936
May–Oct 2015
6-Month
68.2°F
(20.1°C)
67.2°F
(19.6°C)
1.0°F
(0.5°C)
96th Coolest
Coolest since:
1917
33rd Warmest
Warmest since:
1936
Ties: 1913, 1919, 1963, 2019
Apr–Oct 2015
7-Month
66.2°F
(19.0°C)
65.0°F
(18.3°C)
1.2°F
(0.7°C)
102nd Coolest
Coolest since:
1917
27th Warmest
Warmest since:
2010
Ties: 1959
Mar–Oct 2015
8-Month
62.7°F
(17.1°C)
61.8°F
(16.6°C)
0.9°F
(0.5°C)
91st Coolest
Coolest since:
1917
38th Warmest
Warmest since:
2012
Ties: 1930
Feb–Oct 2015
9-Month
57.9°F
(14.4°C)
58.2°F
(14.6°C)
-0.3°F
(-0.2°C)
50th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
2012
Ties: 1943, 1961
Jan–Oct 2015
10-Month
54.7°F
(12.6°C)
54.9°F
(12.7°C)
-0.2°F
(-0.1°C)
54th Coolest
Coolest since:
1904
75th Warmest
Warmest since:
2012
Ties: 1906, 1943, 1957, 1974
Dec 2014–Oct 2015
11-Month
52.8°F
(11.6°C)
52.6°F
(11.4°C)
0.2°F
(0.2°C)
72nd Coolest
Coolest since:
1904
56th Warmest
Warmest since:
2012
Ties: 1925, 1957, 1971, 1981, 1985
Nov 2014–Oct 2015
12-Month
51.3°F
(10.7°C)
51.7°F
(10.9°C)
-0.4°F
(-0.2°C)
46th Coolest
Coolest since:
1904
82nd Warmest
Warmest since:
2012
Ties: 1909, 1927, 1943, 2008
May 2014–Oct 2015
18-Month
56.4°F
(13.6°C)
56.8°F
(13.8°C)
-0.4°F
(-0.2°C)
37th Coolest
Coolest since:
1904
91st Warmest
Warmest since:
2012
Ties: 1903, 1943, 1952, 1961
Nov 2013–Oct 2015
24-Month
50.2°F
(10.1°C)
51.6°F
(10.9°C)
-1.4°F
(-0.8°C)
6th Coolest
Coolest since:
1905
121st Warmest
Warmest since:
2017
Ties: 1917
Nov 2012–Oct 2015
36-Month
50.9°F
(10.5°C)
51.6°F
(10.9°C)
-0.7°F
(-0.4°C)
17th Coolest
Coolest since:
1904, 1979
109th Warmest
Warmest since:
2018
Ties: 1926, 1969
Nov 2011–Oct 2015
48-Month
52.2°F
(11.2°C)
51.6°F
(10.9°C)
0.6°F
(0.3°C)
86th Coolest
Coolest since:
1905
39th Warmest
Warmest since:
2019
Ties: 1923, 1939, 1944
Nov 2010–Oct 2015
60-Month
52.1°F
(11.2°C)
51.5°F
(10.8°C)
0.6°F
(0.4°C)
78th Coolest
Coolest since:
1905, 1906
46th Warmest
Warmest since:
2002, 2020
Ties: 1937, 1943, 1988, 1993

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