Climate at a Glance

Statewide Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of September 2021. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 2002

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
September 2002
1-Month
69.3°F
(20.7°C)
66.2°F
(19.0°C)
3.1°F
(1.7°C)
105th Coolest Coolest since: 2001 1918
23rd Warmest Warmest since: 1998 1925, 1933
Aug–Sep 2002
2-Month
72.2°F
(22.3°C)
69.9°F
(21.1°C)
2.3°F
(1.2°C)
109th Coolest Coolest since: 2001 1967
19th Warmest Warmest since: 1998 1936
Ties: 1938, 1941, 1960, 2019
Jul–Sep 2002
3-Month
74.2°F
(23.4°C)
71.8°F
(22.1°C)
2.4°F
(1.3°C)
120th Coolest Coolest since: 2001 1967
8th Warmest Warmest since: 1988 1936
Ties: 1954, 2005
Jun–Sep 2002
4-Month
74.1°F
(23.4°C)
71.6°F
(22.0°C)
2.5°F
(1.4°C)
117th Coolest Coolest since: 2001 1915, 1924
11th Warmest Warmest since: 1988 1936
Ties: 2010
May–Sep 2002
5-Month
71.1°F
(21.7°C)
69.7°F
(20.9°C)
1.4°F
(0.8°C)
95th Coolest Coolest since: 2001 1924
33rd Warmest Warmest since: 1998 1936
Apr–Sep 2002
6-Month
68.2°F
(20.1°C)
66.7°F
(19.3°C)
1.5°F
(0.8°C)
104th Coolest Coolest since: 2001 1907
24th Warmest Warmest since: 1998 2010
Ties: 1911, 1931, 1986
Mar–Sep 2002
7-Month
63.8°F
(17.7°C)
62.8°F
(17.1°C)
1.0°F
(0.6°C)
93rd Coolest Coolest since: 2001 1924
35th Warmest Warmest since: 2000 2012
Ties: 1973, 1985
Feb–Sep 2002
8-Month
60.2°F
(15.7°C)
58.7°F
(14.8°C)
1.5°F
(0.9°C)
110th Coolest Coolest since: 2001 1904
18th Warmest Warmest since: 2000 2012
Ties: 1931, 1953, 1986, 1999, 2007, 2018
Jan–Sep 2002
9-Month
57.2°F
(14.0°C)
54.9°F
(12.7°C)
2.3°F
(1.3°C)
115th Coolest Coolest since: 2001 1904, 1912
13th Warmest Warmest since: 1998 2012
Dec 2001–Sep 2002
10-Month
55.1°F
(12.8°C)
52.4°F
(11.3°C)
2.7°F
(1.5°C)
120th Coolest Coolest since: 2001 1904
7th Warmest Warmest since: 1998 2012
Nov 2001–Sep 2002
11-Month
54.6°F
(12.6°C)
51.3°F
(10.7°C)
3.3°F
(1.9°C)
123rd Coolest Coolest since: 2001 1904
4th Warmest Warmest since: 1921 2012
Oct 2001–Sep 2002
12-Month
54.5°F
(12.5°C)
51.6°F
(10.9°C)
2.9°F
(1.6°C)
122nd Coolest Coolest since: 2001 1904
5th Warmest Warmest since: 1921 2012
Apr 2001–Sep 2002
18-Month
59.0°F
(15.0°C)
56.7°F
(13.7°C)
2.3°F
(1.3°C)
123rd Coolest Coolest since: 2001 1904, 1918
4th Warmest Warmest since: 1932 2012
Ties: 1932
Oct 2000–Sep 2002
24-Month
52.9°F
(11.6°C)
51.6°F
(10.9°C)
1.3°F
(0.7°C)
105th Coolest Coolest since: 2001 1979
21st Warmest Warmest since: 2000 2017
Ties: 1934, 1942, 2021
Oct 1999–Sep 2002
36-Month
53.3°F
(11.8°C)
51.6°F
(10.9°C)
1.7°F
(0.9°C)
114th Coolest Coolest since: 2001 1979
11th Warmest Warmest since: 2000 2018
Ties: 2019
Oct 1998–Sep 2002
48-Month
53.4°F
(11.9°C)
51.6°F
(10.9°C)
1.8°F
(1.0°C)
120th Coolest Coolest since: 2001 1905
4th Warmest Warmest to Date 2019
Ties: 2013
Oct 1997–Sep 2002
60-Month
53.5°F
(11.9°C)
51.5°F
(10.8°C)
2.0°F
(1.1°C)
121st Coolest Coolest since: 2001 1906
2nd Warmest Warmest to Date 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published October 2021, retrieved on October 26, 2021 from https://www.ncdc.noaa.gov/cag/