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


Illinois

Average Temperature Rankings, September 1921

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1921
1-Month
70.3°F
(21.3°C)
66.2°F
(19.0°C)
4.1°F
(2.3°C)
116th Coolest Coolest since: 1920 1918
11th Warmest Warmest since: 1897 1925, 1933
Ties: 2018
Aug–Sep 1921
2-Month
71.6°F
(22.0°C)
69.8°F
(21.0°C)
1.8°F
(1.0°C)
98th Coolest Coolest since: 1920 1967
29th Warmest Warmest since: 1913 1936
Ties: 1922, 1978
Jul–Sep 1921
3-Month
74.3°F
(23.5°C)
71.7°F
(22.1°C)
2.6°F
(1.4°C)
120th Coolest Coolest since: 1920 1967
7th Warmest Warmest to Date 1936
Jun–Sep 1921
4-Month
74.6°F
(23.7°C)
71.6°F
(22.0°C)
3.0°F
(1.7°C)
123rd Coolest Coolest since: 1920 1915, 1924
4th Warmest Warmest to Date 1936
May–Sep 1921
5-Month
72.5°F
(22.5°C)
69.7°F
(20.9°C)
2.8°F
(1.6°C)
122nd Coolest Coolest since: 1920 1924
5th Warmest Warmest to Date 1936
Apr–Sep 1921
6-Month
69.5°F
(20.8°C)
66.7°F
(19.3°C)
2.8°F
(1.5°C)
124th Coolest Coolest since: 1920 1907
3rd Warmest Warmest to Date 2010
Ties: 1934, 1991
Mar–Sep 1921
7-Month
66.5°F
(19.2°C)
62.9°F
(17.2°C)
3.6°F
(2.0°C)
125th Coolest Coolest since: 1920 1924
2nd Warmest Warmest to Date 2012
Feb–Sep 1921
8-Month
62.5°F
(16.9°C)
58.6°F
(14.8°C)
3.9°F
(2.1°C)
125th Coolest Coolest since: 1920 1904
2nd Warmest Warmest to Date 2012
Jan–Sep 1921
9-Month
59.2°F
(15.1°C)
55.0°F
(12.8°C)
4.2°F
(2.3°C)
125th Coolest Coolest since: 1920 1904, 1912
2nd Warmest Warmest to Date 2012
Dec 1920–Sep 1921
10-Month
56.4°F
(13.6°C)
52.4°F
(11.3°C)
4.0°F
(2.3°C)
124th Coolest Coolest since: 1920 1904
2nd Warmest Warmest to Date 2012
Nov 1920–Sep 1921
11-Month
54.8°F
(12.7°C)
51.4°F
(10.8°C)
3.4°F
(1.9°C)
123rd Coolest Coolest since: 1920 1904
3rd Warmest Warmest to Date 2012
Oct 1920–Sep 1921
12-Month
55.1°F
(12.8°C)
51.6°F
(10.9°C)
3.5°F
(1.9°C)
123rd Coolest Coolest since: 1920 1904
3rd Warmest Warmest to Date 2012
Apr 1920–Sep 1921
18-Month
58.5°F
(14.7°C)
56.7°F
(13.7°C)
1.8°F
(1.0°C)
116th Coolest Coolest since: 1920 1904, 1918
10th Warmest Warmest to Date 2012
Ties: 2000
Oct 1919–Sep 1921
24-Month
52.5°F
(11.4°C)
51.6°F
(10.9°C)
0.9°F
(0.5°C)
93rd Coolest Coolest since: 1920 1979
32nd Warmest Warmest since: 1914 2017
Ties: 2019
Oct 1918–Sep 1921
36-Month
52.8°F
(11.6°C)
51.6°F
(10.9°C)
1.2°F
(0.7°C)
104th Coolest Coolest since: 1920 1979
20th Warmest Warmest to Date 2018
Ties: 1992, 1999
Oct 1917–Sep 1921
48-Month
51.9°F
(11.1°C)
51.6°F
(10.9°C)
0.3°F
(0.2°C)
73rd Coolest Coolest since: 1920 1905
50th Warmest Warmest to Date 2019
Ties: 1937, 1938, 1943, 1975, 1994, 2016
Oct 1916–Sep 1921
60-Month
51.4°F
(10.8°C)
51.6°F
(10.9°C)
-0.2°F
(-0.1°C)
41st Coolest Coolest since: 1920 1906
81st Warmest Warmest since: 1917 2020
Ties: 1901, 1915, 1917, 1926, 1951, 1968, 1984, 1985, 1996

Citing This Page

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