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 May 2021. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 1897

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1897
1-Month
71.3°F
(21.8°C)
66.2°F
(19.0°C)
5.1°F
(2.8°C)
122nd Coolest Coolest since: 1896 1918
5th Warmest Warmest to Date 1925, 1933
Aug–Sep 1897
2-Month
71.4°F
(21.9°C)
69.8°F
(21.0°C)
1.6°F
(0.9°C)
95th Coolest Coolest since: 1896 1967
32nd Warmest Warmest since: 1895 1936
Jul–Sep 1897
3-Month
73.2°F
(22.9°C)
71.8°F
(22.1°C)
1.4°F
(0.8°C)
99th Coolest Coolest since: 1896 1967
28th Warmest Warmest to Date 1936
Jun–Sep 1897
4-Month
72.6°F
(22.6°C)
71.7°F
(22.1°C)
0.9°F
(0.5°C)
89th Coolest Coolest since: 1896 1915, 1924
38th Warmest Warmest since: 1895 1936
Ties: 1895, 1922, 1938, 1978
May–Sep 1897
5-Month
69.8°F
(21.0°C)
69.8°F
(21.0°C)
0.0°F
(0.0°C)
60th Coolest Coolest to Date 1924
67th Warmest Warmest since: 1896 1936
Ties: 2006
Apr–Sep 1897
6-Month
66.5°F
(19.2°C)
66.7°F
(19.3°C)
-0.2°F
(-0.1°C)
46th Coolest Coolest to Date 1907
81st Warmest Warmest since: 1896 2010
Ties: 1912, 1947, 1969, 2004
Mar–Sep 1897
7-Month
62.5°F
(16.9°C)
62.8°F
(17.1°C)
-0.3°F
(-0.2°C)
46th Coolest Coolest to Date 1924
81st Warmest Warmest since: 1896 2012
Ties: 1903, 1935, 1937, 1978, 2009
Feb–Sep 1897
8-Month
58.5°F
(14.7°C)
58.6°F
(14.8°C)
-0.1°F
(-0.1°C)
59th Coolest Coolest since: 1895 1904
68th Warmest Warmest since: 1896 2012
Ties: 1914
Jan–Sep 1897
9-Month
54.6°F
(12.6°C)
54.9°F
(12.7°C)
-0.3°F
(-0.1°C)
52nd Coolest Coolest since: 1895 1904, 1912
75th Warmest Warmest since: 1896 2012
Ties: 1909, 1937
Dec 1896–Sep 1897
10-Month
52.6°F
(11.4°C)
52.5°F
(11.4°C)
0.1°F
(0.0°C)
71st Coolest Coolest to Date 1904
55th Warmest Warmest since: 1896 2012
Ties: 1980
Nov 1896–Sep 1897
11-Month
51.4°F
(10.8°C)
51.4°F
(10.8°C)
0.0°F
(0.0°C)
63rd Coolest Coolest to Date 1904
63rd Warmest Warmest since: 1896 2012
Ties: 1909, 1985
Oct 1896–Sep 1897
12-Month
51.3°F
(10.7°C)
51.7°F
(10.9°C)
-0.4°F
(-0.2°C)
44th Coolest Coolest to Date 1904
82nd Warmest Warmest since: 1896 2012
Ties: 1928, 1936, 1937, 1956, 1975, 2001
Apr 1896–Sep 1897
18-Month
56.9°F
(13.8°C)
56.6°F
(13.7°C)
0.3°F
(0.1°C)
69th Coolest Coolest to Date 1904, 1918
57th Warmest Warmest since: 1896 2012
Ties: 1944
Oct 1895–Sep 1897
24-Month
51.4°F
(10.8°C)
51.6°F
(10.9°C)
-0.2°F
(-0.1°C)
44th Coolest Coolest to Date 1979
81st Warmest Warmest to Date 2017
Ties: 1925, 1926, 1958, 2009

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published June 2021, retrieved on June 15, 2021 from https://www.ncdc.noaa.gov/cag/