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 2020

View Period (Months):
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  • Record Coolest
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  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
October 2020
1-Month
52.0°F
(11.1°C)
54.6°F
(12.6°C)
-2.6°F
(-1.5°C)
23rd Coolest
Coolest since:
1925
106th Warmest
Warmest since:
1963
Ties: 1977
Sep–Oct 2020
2-Month
58.8°F
(14.9°C)
60.4°F
(15.8°C)
-1.6°F
(-0.9°C)
25th Coolest
Coolest since:
1917
104th Warmest
Warmest since:
1897, 2016
Ties: 1949
Aug–Oct 2020
3-Month
63.5°F
(17.5°C)
64.8°F
(18.2°C)
-1.3°F
(-0.7°C)
23rd Coolest
Coolest since:
1917
106th Warmest
Warmest since:
1947
Ties: 1909, 1951
Jul–Oct 2020
4-Month
66.9°F
(19.4°C)
67.4°F
(19.7°C)
-0.5°F
(-0.3°C)
47th Coolest
Coolest since:
1917
82nd Warmest
Warmest since:
1936
Ties: 1985, 2008
Jun–Oct 2020
5-Month
68.3°F
(20.2°C)
68.3°F
(20.2°C)
0.0°F
(0.0°C)
71st Coolest
Coolest since:
1917
58th Warmest
Warmest since:
1936
Ties: 1932, 1952, 1970, 1987
May–Oct 2020
6-Month
67.0°F
(19.4°C)
67.2°F
(19.6°C)
-0.2°F
(-0.2°C)
53rd Coolest
Coolest since:
1917
76th Warmest
Warmest since:
1936
Ties: 1926, 1960
Apr–Oct 2020
7-Month
64.5°F
(18.1°C)
65.0°F
(18.3°C)
-0.5°F
(-0.2°C)
37th Coolest
Coolest since:
1917
92nd Warmest
Warmest since:
2010
Ties: 1898, 1969, 2003, 2008
Mar–Oct 2020
8-Month
62.0°F
(16.7°C)
61.8°F
(16.6°C)
0.2°F
(0.1°C)
65th Coolest
Coolest since:
1917
64th Warmest
Warmest since:
2012
Feb–Oct 2020
9-Month
58.6°F
(14.8°C)
58.2°F
(14.6°C)
0.4°F
(0.2°C)
78th Coolest
Coolest since:
1917
51st Warmest
Warmest since:
2012
Ties: 1897, 1952, 1964
Jan–Oct 2020
10-Month
56.0°F
(13.3°C)
55.0°F
(12.8°C)
1.0°F
(0.5°C)
94th Coolest
Coolest since:
1904
35th Warmest
Warmest since:
2012
Ties: 2018
Dec 2019–Oct 2020
11-Month
54.1°F
(12.3°C)
52.6°F
(11.4°C)
1.5°F
(0.9°C)
102nd Coolest
Coolest since:
1904
26th Warmest
Warmest since:
2012
Ties: 1922, 1939
Nov 2019–Oct 2020
12-Month
52.6°F
(11.4°C)
51.6°F
(10.9°C)
1.0°F
(0.5°C)
94th Coolest
Coolest since:
1904
34th Warmest
Warmest since:
2012
Ties: 1988, 2018
May 2019–Oct 2020
18-Month
57.8°F
(14.3°C)
56.8°F
(13.8°C)
1.0°F
(0.5°C)
97th Coolest
Coolest since:
1904
31st Warmest
Warmest since:
2012
Ties: 1941, 1988, 2011, 2013, 2018
Nov 2018–Oct 2020
24-Month
52.3°F
(11.3°C)
51.6°F
(10.9°C)
0.7°F
(0.4°C)
90th Coolest
Coolest since:
1905
37th Warmest
Warmest since:
2017
Ties: 1947, 2019
Nov 2017–Oct 2020
36-Month
52.4°F
(11.3°C)
51.6°F
(10.9°C)
0.8°F
(0.4°C)
93rd Coolest
Coolest since:
1904, 1979
33rd Warmest
Warmest since:
2018
Ties: 1940, 1987
Nov 2016–Oct 2020
48-Month
53.0°F
(11.7°C)
51.6°F
(10.9°C)
1.4°F
(0.8°C)
110th Coolest
Coolest since:
1905
15th Warmest
Warmest since:
2019
Ties: 1935
Nov 2015–Oct 2020
60-Month
53.5°F
(11.9°C)
51.6°F
(10.9°C)
1.9°F
(1.0°C)
123rd Coolest
Coolest since:
1905, 1906
1st Warmest
Warmest since:
2002, 2020
Ties: 2002

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