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 2017

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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 2017
1-Month 		58.1°F
(14.5°C)		 54.6°F
(12.6°C)		 3.5°F
(1.9°C)		 110th Coolest
Coolest since:
 1925
19th Warmest
Warmest since:
 1963
Sep–Oct 2017
2-Month 		63.4°F
(17.4°C)		 60.4°F
(15.8°C)		 3.0°F
(1.6°C)		 115th Coolest
Coolest since:
 1917
14th Warmest
Warmest since:
 1897, 2016
Ties: 1938, 1941, 1973
Aug–Oct 2017
3-Month 		65.8°F
(18.8°C)		 64.8°F
(18.2°C)		 1.0°F
(0.6°C)		 92nd Coolest
Coolest since:
 1917
37th Warmest
Warmest since:
 1947
Ties: 1933, 1995
Jul–Oct 2017
4-Month 		68.4°F
(20.2°C)		 67.5°F
(19.7°C)		 0.9°F
(0.5°C)		 92nd Coolest
Coolest since:
 1917
37th Warmest
Warmest since:
 1936
Ties: 1913, 1935, 1956, 2011
Jun–Oct 2017
5-Month 		69.2°F
(20.7°C)		 68.2°F
(20.1°C)		 1.0°F
(0.6°C)		 92nd Coolest
Coolest since:
 1917
37th Warmest
Warmest since:
 1936
Ties: 1944, 1995
May–Oct 2017
6-Month 		68.0°F
(20.0°C)		 67.2°F
(19.6°C)		 0.8°F
(0.4°C)		 82nd Coolest
Coolest since:
 1917
47th Warmest
Warmest since:
 1936
Ties: 1962, 1973
Apr–Oct 2017
7-Month 		66.4°F
(19.1°C)		 65.0°F
(18.3°C)		 1.4°F
(0.8°C)		 108th Coolest
Coolest since:
 1917
21st Warmest
Warmest since:
 2010
Ties: 1938, 1986, 2018
Mar–Oct 2017
8-Month 		63.5°F
(17.5°C)		 61.9°F
(16.6°C)		 1.6°F
(0.9°C)		 114th Coolest
Coolest since:
 1917
15th Warmest
Warmest since:
 2012
Ties: 1941, 1963, 1986
Feb–Oct 2017
9-Month 		61.0°F
(16.1°C)		 58.2°F
(14.6°C)		 2.8°F
(1.5°C)		 123rd Coolest
Coolest since:
 1917
6th Warmest
Warmest since:
 2012
Ties: 1938
Jan–Oct 2017
10-Month 		58.1°F
(14.5°C)		 54.9°F
(12.7°C)		 3.2°F
(1.8°C)		 125th Coolest
Coolest since:
 1904
4th Warmest
Warmest since:
 2012
Dec 2016–Oct 2017
11-Month 		55.4°F
(13.0°C)		 52.6°F
(11.4°C)		 2.8°F
(1.6°C)		 123rd Coolest
Coolest since:
 1904
5th Warmest
Warmest since:
 2012
Nov 2016–Oct 2017
12-Month 		54.8°F
(12.7°C)		 51.6°F
(10.9°C)		 3.2°F
(1.8°C)		 125th Coolest
Coolest since:
 1904
3rd Warmest
Warmest since:
 2012
May 2016–Oct 2017
18-Month 		59.8°F
(15.4°C)		 56.8°F
(13.8°C)		 3.0°F
(1.6°C)		 126th Coolest
Coolest since:
 1904
2nd Warmest
Warmest since:
 2012
Ties: 2016
Nov 2015–Oct 2017
24-Month 		55.2°F
(12.9°C)		 51.6°F
(10.9°C)		 3.6°F
(2.0°C)		 126th Coolest
Coolest since:
 1905
1st Warmest
Warmest to Date
 2017
Nov 2014–Oct 2017
36-Month 		53.9°F
(12.2°C)		 51.6°F
(10.9°C)		 2.3°F
(1.3°C)		 123rd Coolest
Coolest since:
 1904, 1979
3rd Warmest
Warmest since:
 2018
Ties: 2007, 2012
Nov 2013–Oct 2017
48-Month 		52.7°F
(11.5°C)		 51.6°F
(10.9°C)		 1.1°F
(0.6°C)		 106th Coolest
Coolest since:
 1905
19th Warmest
Warmest since:
 2019
Ties: 2003, 2021, 2022
Nov 2012–Oct 2017
60-Month 		52.6°F
(11.4°C)		 51.6°F
(10.9°C)		 1.0°F
(0.5°C)		 100th Coolest
Coolest since:
 1905, 1906
24th Warmest
Warmest since:
 2002, 2020
Ties: 1933, 2010, 2014

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