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 2020. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 1905

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1905
1-Month
67.3°F
(19.6°C)
66.2°F
(19.0°C)
1.1°F
(0.6°C)
76th Coolest Coolest since: 1904 1918
51st Warmest Warmest since: 1900 1925, 1933
Aug–Sep 1905
2-Month
70.7°F
(21.5°C)
69.8°F
(21.0°C)
0.9°F
(0.5°C)
85th Coolest Coolest since: 1904 1967
42nd Warmest Warmest since: 1900 1936
Ties: 1919, 2013
Jul–Sep 1905
3-Month
71.3°F
(21.8°C)
71.7°F
(22.1°C)
-0.4°F
(-0.3°C)
48th Coolest Coolest since: 1904 1967
79th Warmest Warmest since: 1901 1936
Ties: 1912, 1920
Jun–Sep 1905
4-Month
71.5°F
(21.9°C)
71.6°F
(22.0°C)
-0.1°F
(-0.1°C)
51st Coolest Coolest since: 1904 1915, 1924
76th Warmest Warmest since: 1901 1936
Ties: 1949, 1968, 2013
May–Sep 1905
5-Month
69.7°F
(20.9°C)
69.7°F
(20.9°C)
0.0°F
(0.0°C)
56th Coolest Coolest since: 1904 1924
71st Warmest Warmest since: 1901 1936
Ties: 1926, 1957, 1973
Apr–Sep 1905
6-Month
66.6°F
(19.2°C)
66.7°F
(19.3°C)
-0.1°F
(-0.1°C)
51st Coolest Coolest since: 1904 1907
76th Warmest Warmest since: 1901 2010
Ties: 1916, 1943, 1971, 1973, 1981, 2020
Mar–Sep 1905
7-Month
63.4°F
(17.4°C)
62.8°F
(17.1°C)
0.6°F
(0.3°C)
76th Coolest Coolest since: 1904 1924
51st Warmest Warmest since: 1896 2012
Ties: 1942, 1983, 2020
Feb–Sep 1905
8-Month
57.7°F
(14.3°C)
58.7°F
(14.8°C)
-1.0°F
(-0.5°C)
28th Coolest Coolest since: 1904 1904
99th Warmest Warmest since: 1903 2012
Ties: 1965, 1966, 2008
Jan–Sep 1905
9-Month
53.4°F
(11.9°C)
55.0°F
(12.8°C)
-1.6°F
(-0.9°C)
13th Coolest Coolest since: 1904 1904, 1912
114th Warmest Warmest since: 1903 2012
Ties: 1895, 1918, 1920, 1929, 1960
Dec 1904–Sep 1905
10-Month
50.8°F
(10.4°C)
52.4°F
(11.3°C)
-1.6°F
(-0.9°C)
16th Coolest Coolest since: 1904 1904
110th Warmest Warmest since: 1903 2012
Ties: 1963
Nov 1904–Sep 1905
11-Month
50.0°F
(10.0°C)
51.4°F
(10.8°C)
-1.4°F
(-0.8°C)
18th Coolest Coolest since: 1904 1904
108th Warmest Warmest since: 1903 2012
Ties: 1960, 1963
Oct 1904–Sep 1905
12-Month
50.3°F
(10.2°C)
51.6°F
(10.9°C)
-1.3°F
(-0.7°C)
16th Coolest Coolest since: 1904 1904
110th Warmest Warmest since: 1903 2012
Ties: 1958, 1960, 1977, 1984
Apr 1904–Sep 1905
18-Month
54.9°F
(12.7°C)
56.7°F
(13.7°C)
-1.8°F
(-1.0°C)
4th Coolest Coolest since: 1904 1904, 1918
122nd Warmest Warmest since: 1903 2012
Oct 1903–Sep 1905
24-Month
49.2°F
(9.6°C)
51.7°F
(10.9°C)
-2.5°F
(-1.3°C)
2nd Coolest Coolest to Date 1979
123rd Warmest Warmest since: 1904 2017
Oct 1902–Sep 1905
36-Month
49.9°F
(9.9°C)
51.6°F
(10.9°C)
-1.7°F
(-1.0°C)
3rd Coolest Coolest since: 1904 1979
121st Warmest Warmest since: 1903 2018
Ties: 1906
Oct 1901–Sep 1905
48-Month
49.8°F
(9.9°C)
51.5°F
(10.8°C)
-1.7°F
(-0.9°C)
1st Coolest Coolest to Date 1905
122nd Warmest Warmest since: 1904 2019
Oct 1900–Sep 1905
60-Month
50.3°F
(10.2°C)
51.6°F
(10.9°C)
-1.3°F
(-0.7°C)
2nd Coolest Coolest to Date 1906
120th Warmest Warmest since: 1904 2020
Ties: 1982

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published October 2020, retrieved on October 28, 2020 from https://www.ncdc.noaa.gov/cag/