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 August 2020. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 2019

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
September 2019
1-Month
71.6°F
(22.0°C)
66.2°F
(19.0°C)
5.4°F
(3.0°C)
122nd Coolest Coolest since: 2018 1918
4th Warmest Warmest since: 1933 1925, 1933
Aug–Sep 2019
2-Month
72.2°F
(22.3°C)
69.8°F
(21.0°C)
2.4°F
(1.3°C)
108th Coolest Coolest since: 2017 1967
18th Warmest Warmest since: 2018 1936
Ties: 1938, 1941, 1960, 2002
Jul–Sep 2019
3-Month
73.9°F
(23.3°C)
71.7°F
(22.1°C)
2.2°F
(1.2°C)
112th Coolest Coolest since: 2018 1967
14th Warmest Warmest since: 2016 1936
Ties: 1900, 2010
Jun–Sep 2019
4-Month
73.2°F
(22.9°C)
71.7°F
(22.1°C)
1.5°F
(0.8°C)
102nd Coolest Coolest since: 2017 1915, 1924
24th Warmest Warmest since: 2018 1936
Ties: 1987, 1998, 2012
May–Sep 2019
5-Month
71.0°F
(21.7°C)
69.7°F
(20.9°C)
1.3°F
(0.8°C)
92nd Coolest Coolest since: 2017 1924
34th Warmest Warmest since: 2018 1936
Apr–Sep 2019
6-Month
67.9°F
(19.9°C)
66.7°F
(19.3°C)
1.2°F
(0.6°C)
94th Coolest Coolest since: 2017 1907
32nd Warmest Warmest since: 2018 2010
Ties: 1944, 1980, 2015
Mar–Sep 2019
7-Month
63.6°F
(17.6°C)
62.9°F
(17.2°C)
0.7°F
(0.4°C)
86th Coolest Coolest since: 2014 1924
40th Warmest Warmest since: 2018 2012
Ties: 1931
Feb–Sep 2019
8-Month
59.3°F
(15.2°C)
58.7°F
(14.8°C)
0.6°F
(0.4°C)
80th Coolest Coolest since: 2015 1904
46th Warmest Warmest since: 2018 2012
Ties: 1896, 1995, 2004
Jan–Sep 2019
9-Month
55.5°F
(13.1°C)
54.9°F
(12.7°C)
0.6°F
(0.4°C)
79th Coolest Coolest since: 2015 1904, 1912
47th Warmest Warmest since: 2018 2012
Ties: 1949, 1976, 1995
Dec 2018–Sep 2019
10-Month
53.4°F
(11.9°C)
52.4°F
(11.3°C)
1.0°F
(0.6°C)
89th Coolest Coolest since: 2015 1904
36th Warmest Warmest since: 2018 2012
Ties: 1896, 1944
Nov 2018–Sep 2019
11-Month
51.8°F
(11.0°C)
51.4°F
(10.8°C)
0.4°F
(0.2°C)
77th Coolest Coolest since: 2015 1904
48th Warmest Warmest since: 2018 2012
Ties: 1952, 1957
Oct 2018–Sep 2019
12-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
75th Coolest Coolest since: 2015 1904
50th Warmest Warmest since: 2018 2012
Ties: 1901, 1944, 1946, 1959, 1985, 1992, 2013
Apr 2018–Sep 2019
18-Month
57.5°F
(14.2°C)
56.7°F
(13.7°C)
0.8°F
(0.5°C)
93rd Coolest Coolest since: 2015 1904, 1918
32nd Warmest Warmest since: 2018 2012
Ties: 1937, 1983, 1995
Oct 2017–Sep 2019
24-Month
52.5°F
(11.4°C)
51.7°F
(10.9°C)
0.8°F
(0.5°C)
92nd Coolest Coolest since: 2015 1979
32nd Warmest Warmest since: 2018 2017
Ties: 1921
Oct 2016–Sep 2019
36-Month
53.3°F
(11.8°C)
51.6°F
(10.9°C)
1.7°F
(0.9°C)
112th Coolest Coolest since: 2016 1979
11th Warmest Warmest since: 2018 2018
Ties: 2002
Oct 2015–Sep 2019
48-Month
53.8°F
(12.1°C)
51.6°F
(10.9°C)
2.2°F
(1.2°C)
121st Coolest Coolest since: 2018 1905
1st Warmest Warmest to Date 2019
Oct 2014–Sep 2019
60-Month
53.3°F
(11.8°C)
51.6°F
(10.9°C)
1.7°F
(0.9°C)
119th Coolest Coolest since: 2018 1906
2nd Warmest Warmest since: 2002 2002

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2020, retrieved on September 23, 2020 from https://www.ncdc.noaa.gov/cag/