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


Illinois

Average Temperature Rankings, September 1901

View Period (Months):All1234567891011121824364860
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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1901
1-Month
65.7°F
(18.7°C)
66.2°F
(19.0°C)
-0.5°F
(-0.3°C)
52nd Coolest Coolest since: 1899 1918
75th Warmest Warmest since: 1900 1925, 1933
Ties: 1979, 2020
Aug–Sep 1901
2-Month
69.9°F
(21.1°C)
69.8°F
(21.0°C)
0.1°F
(0.1°C)
66th Coolest Coolest since: 1896 1967
61st Warmest Warmest since: 1900 1936
Jul–Sep 1901
3-Month
73.8°F
(23.2°C)
71.8°F
(22.1°C)
2.0°F
(1.1°C)
110th Coolest Coolest since: 1899 1967
17th Warmest Warmest since: 1900 1936
Ties: 1913, 2007
Jun–Sep 1901
4-Month
73.9°F
(23.3°C)
71.7°F
(22.1°C)
2.2°F
(1.2°C)
114th Coolest Coolest since: 1900 1915, 1924
13th Warmest Warmest to Date 1936
May–Sep 1901
5-Month
71.2°F
(21.8°C)
69.7°F
(20.9°C)
1.5°F
(0.9°C)
99th Coolest Coolest since: 1900 1924
28th Warmest Warmest since: 1900 1936
Ties: 1900, 1922, 1954, 1983
Apr–Sep 1901
6-Month
67.5°F
(19.7°C)
66.7°F
(19.3°C)
0.8°F
(0.4°C)
79th Coolest Coolest since: 1899 1907
48th Warmest Warmest since: 1900 2010
Mar–Sep 1901
7-Month
63.3°F
(17.4°C)
62.8°F
(17.1°C)
0.5°F
(0.3°C)
72nd Coolest Coolest since: 1900 1924
55th Warmest Warmest since: 1898 2012
Ties: 1898, 1944, 1948, 1952, 1980
Feb–Sep 1901
8-Month
58.0°F
(14.4°C)
58.6°F
(14.8°C)
-0.6°F
(-0.4°C)
37th Coolest Coolest since: 1900 1904
90th Warmest Warmest since: 1900 2012
Ties: 1900, 1903, 1909, 1972, 2013
Jan–Sep 1901
9-Month
54.8°F
(12.7°C)
55.0°F
(12.8°C)
-0.2°F
(-0.1°C)
60th Coolest Coolest since: 1899 1904, 1912
67th Warmest Warmest since: 1900 2012
Ties: 1943, 2013
Dec 1900–Sep 1901
10-Month
52.4°F
(11.3°C)
52.5°F
(11.4°C)
-0.1°F
(-0.1°C)
58th Coolest Coolest since: 1900 1904
68th Warmest Warmest since: 1898 2012
Ties: 1906, 1935, 1956, 1959, 1964, 1972
Nov 1900–Sep 1901
11-Month
51.2°F
(10.7°C)
51.4°F
(10.8°C)
-0.2°F
(-0.1°C)
54th Coolest Coolest since: 1899 1904
72nd Warmest Warmest since: 1900 2012
Ties: 1903, 1916, 1947, 1966, 1989
Oct 1900–Sep 1901
12-Month
52.0°F
(11.1°C)
51.7°F
(10.9°C)
0.3°F
(0.2°C)
75th Coolest Coolest since: 1899 1904
51st Warmest Warmest since: 1900 2012
Ties: 1944, 1946, 1959, 1985, 1992, 2013, 2019
Apr 1900–Sep 1901
18-Month
57.3°F
(14.1°C)
56.6°F
(13.7°C)
0.7°F
(0.4°C)
86th Coolest Coolest since: 1900 1904, 1918
40th Warmest Warmest to Date 2012
Ties: 1949, 1957, 1964, 2010
Oct 1899–Sep 1901
24-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
81st Coolest Coolest since: 1900 1979
44th Warmest Warmest to Date 2017
Ties: 1938
Oct 1898–Sep 1901
36-Month
51.1°F
(10.6°C)
51.6°F
(10.9°C)
-0.5°F
(-0.3°C)
26th Coolest Coolest since: 1899 1979
98th Warmest Warmest since: 1900 2018
Ties: 1951, 1952, 1961, 1967, 1968, 1982
Oct 1897–Sep 1901
48-Month
51.4°F
(10.8°C)
51.6°F
(10.9°C)
-0.2°F
(-0.1°C)
44th Coolest Coolest since: 1900 1905
79th Warmest Warmest to Date 2019
Ties: 1952, 1966, 1985
Oct 1896–Sep 1901
60-Month
51.4°F
(10.8°C)
51.6°F
(10.9°C)
-0.2°F
(-0.1°C)
41st Coolest Coolest since: 1900 1906
81st Warmest Warmest to Date 2020
Ties: 1915, 1917, 1921, 1926, 1951, 1968, 1984, 1985, 1996

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published July 2021, retrieved on July 31, 2021 from https://www.ncdc.noaa.gov/cag/