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


Illinois

Average Temperature Rankings, September 1911

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1911
1-Month
68.8°F
(20.4°C)
66.2°F
(19.0°C)
2.6°F
(1.4°C)
99th Coolest Coolest since: 1910 1918
28th Warmest Warmest since: 1908 1925, 1933
Ties: 1919, 2017
Aug–Sep 1911
2-Month
70.6°F
(21.4°C)
69.8°F
(21.0°C)
0.8°F
(0.4°C)
82nd Coolest Coolest since: 1910 1967
45th Warmest Warmest since: 1908 1936
Ties: 1926, 1944, 1991
Jul–Sep 1911
3-Month
72.4°F
(22.4°C)
71.8°F
(22.1°C)
0.6°F
(0.3°C)
83rd Coolest Coolest since: 1910 1967
44th Warmest Warmest since: 1908 1936
Ties: 1908, 1922, 1926, 1937
Jun–Sep 1911
4-Month
73.1°F
(22.8°C)
71.6°F
(22.0°C)
1.5°F
(0.8°C)
99th Coolest Coolest since: 1910 1915, 1924
28th Warmest Warmest since: 1901 1936
Ties: 1952, 1955, 1959, 1991
May–Sep 1911
5-Month
72.0°F
(22.2°C)
69.7°F
(20.9°C)
2.3°F
(1.3°C)
114th Coolest Coolest since: 1910 1924
13th Warmest Warmest to Date 1936
Apr–Sep 1911
6-Month
68.2°F
(20.1°C)
66.7°F
(19.3°C)
1.5°F
(0.8°C)
103rd Coolest Coolest since: 1910 1907
24th Warmest Warmest since: 1896 2010
Ties: 1931, 1986, 2002
Mar–Sep 1911
7-Month
64.3°F
(17.9°C)
62.9°F
(17.2°C)
1.4°F
(0.7°C)
107th Coolest Coolest since: 1910 1924
20th Warmest Warmest to Date 2012
Ties: 1922, 1941, 1954
Feb–Sep 1911
8-Month
60.4°F
(15.8°C)
58.7°F
(14.8°C)
1.7°F
(1.0°C)
110th Coolest Coolest since: 1910 1904
17th Warmest Warmest to Date 2012
Jan–Sep 1911
9-Month
56.8°F
(13.8°C)
54.9°F
(12.7°C)
1.9°F
(1.1°C)
107th Coolest Coolest since: 1910 1904, 1912
20th Warmest Warmest to Date 2012
Dec 1910–Sep 1911
10-Month
53.7°F
(12.1°C)
52.4°F
(11.3°C)
1.3°F
(0.8°C)
97th Coolest Coolest since: 1910 1904
29th Warmest Warmest to Date 2012
Ties: 1988
Nov 1910–Sep 1911
11-Month
52.1°F
(11.2°C)
51.4°F
(10.8°C)
0.7°F
(0.4°C)
88th Coolest Coolest since: 1910 1904
38th Warmest Warmest to Date 2012
Ties: 1913
Oct 1910–Sep 1911
12-Month
52.5°F
(11.4°C)
51.7°F
(10.9°C)
0.8°F
(0.5°C)
88th Coolest Coolest since: 1910 1904
38th Warmest Warmest to Date 2012
Ties: 1957
Apr 1910–Sep 1911
18-Month
56.8°F
(13.8°C)
56.7°F
(13.7°C)
0.1°F
(0.1°C)
67th Coolest Coolest since: 1910 1904, 1918
59th Warmest Warmest since: 1901 2012
Ties: 1974
Oct 1909–Sep 1911
24-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
59th Coolest Coolest since: 1910 1979
66th Warmest Warmest since: 1909 2017
Ties: 1909, 1915, 1920, 1936, 1944, 1981
Oct 1908–Sep 1911
36-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
67th Coolest Coolest since: 1910 1979
57th Warmest Warmest since: 1898 2018
Ties: 1898, 1946, 1966, 1975
Oct 1907–Sep 1911
48-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
55th Coolest Coolest since: 1910 1905
68th Warmest Warmest to Date 2019
Ties: 1947, 1948, 1983, 1995
Oct 1906–Sep 1911
60-Month
51.5°F
(10.8°C)
51.6°F
(10.9°C)
-0.1°F
(-0.1°C)
51st Coolest Coolest since: 1910 1906
71st Warmest Warmest to Date 2020
Ties: 1914, 1952, 1974

Citing This Page

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