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 2021

View Period (Months):
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  • Record Coolest
  • Bottom 1/10
  • 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 2021
1-Month
60.2°F
(15.7°C)
54.6°F
(12.6°C)
5.6°F
(3.1°C)
124th Coolest
Coolest since:
1925
5th Warmest
Warmest since:
1963
Ties: 1956
Sep–Oct 2021
2-Month
64.9°F
(18.3°C)
60.4°F
(15.8°C)
4.5°F
(2.5°C)
124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
1897, 2016
Ties: 1947, 2007
Aug–Oct 2021
3-Month
68.4°F
(20.2°C)
64.7°F
(18.2°C)
3.7°F
(2.0°C)
124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
1947
Jul–Oct 2021
4-Month
70.0°F
(21.1°C)
67.5°F
(19.7°C)
2.5°F
(1.4°C)
121st Coolest
Coolest since:
1917
8th Warmest
Warmest since:
1936
Jun–Oct 2021
5-Month
70.8°F
(21.6°C)
68.2°F
(20.1°C)
2.6°F
(1.5°C)
124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
1936
Ties: 2007
May–Oct 2021
6-Month
69.2°F
(20.7°C)
67.2°F
(19.6°C)
2.0°F
(1.1°C)
116th Coolest
Coolest since:
1917
13th Warmest
Warmest since:
1936
Ties: 1914, 1931, 1933
Apr–Oct 2021
7-Month
66.8°F
(19.3°C)
65.0°F
(18.3°C)
1.8°F
(1.0°C)
115th Coolest
Coolest since:
1917
14th Warmest
Warmest since:
2010
Ties: 1931, 1954
Mar–Oct 2021
8-Month
64.2°F
(17.9°C)
61.8°F
(16.6°C)
2.4°F
(1.3°C)
121st Coolest
Coolest since:
1917
8th Warmest
Warmest since:
2012
Feb–Oct 2021
9-Month
59.4°F
(15.2°C)
58.2°F
(14.6°C)
1.2°F
(0.6°C)
103rd Coolest
Coolest since:
1917
26th Warmest
Warmest since:
2012
Ties: 1934, 1941
Jan–Oct 2021
10-Month
56.4°F
(13.6°C)
54.9°F
(12.7°C)
1.5°F
(0.9°C)
104th Coolest
Coolest since:
1904
25th Warmest
Warmest since:
2012
Ties: 1911, 1919, 1986
Dec 2020–Oct 2021
11-Month
54.3°F
(12.4°C)
52.6°F
(11.4°C)
1.7°F
(1.0°C)
107th Coolest
Coolest since:
1904
21st Warmest
Warmest since:
2012
Ties: 1941, 1955
Nov 2020–Oct 2021
12-Month
53.7°F
(12.1°C)
51.7°F
(10.9°C)
2.0°F
(1.2°C)
115th Coolest
Coolest since:
1904
13th Warmest
Warmest since:
2012
Ties: 1953
May 2020–Oct 2021
18-Month
58.1°F
(14.5°C)
56.8°F
(13.8°C)
1.3°F
(0.7°C)
103rd Coolest
Coolest since:
1904
25th Warmest
Warmest since:
2012
Ties: 1919, 1935
Nov 2019–Oct 2021
24-Month
53.1°F
(11.7°C)
51.6°F
(10.9°C)
1.5°F
(0.8°C)
109th Coolest
Coolest since:
1905
18th Warmest
Warmest since:
2017
Ties: 1934, 1991, 1992
Nov 2018–Oct 2021
36-Month
52.7°F
(11.5°C)
51.6°F
(10.9°C)
1.1°F
(0.6°C)
103rd Coolest
Coolest since:
1904, 1979
23rd Warmest
Warmest since:
2018
Ties: 1935, 1988, 1992, 2005
Nov 2017–Oct 2021
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, 2017, 2022
Nov 2016–Oct 2021
60-Month
53.1°F
(11.7°C)
51.5°F
(10.8°C)
1.6°F
(0.9°C)
119th Coolest
Coolest since:
1905, 1906
5th Warmest
Warmest since:
2002, 2020
Ties: 1934, 1935, 2006, 2007

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