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 1947

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1947
1-Month
67.7°F
(19.8°C)
66.2°F
(19.0°C)
1.5°F
(0.8°C)
84th Coolest Coolest since: 1946 1918
43rd Warmest Warmest since: 1941 1925, 1933
Ties: 2004
Aug–Sep 1947
2-Month
74.2°F
(23.4°C)
69.8°F
(21.0°C)
4.4°F
(2.4°C)
125th Coolest Coolest since: 1946 1967
2nd Warmest Warmest since: 1936 1936
Jul–Sep 1947
3-Month
73.6°F
(23.1°C)
71.7°F
(22.1°C)
1.9°F
(1.0°C)
106th Coolest Coolest since: 1946 1967
21st Warmest Warmest since: 1938 1936
Ties: 1916, 1925, 1938
Jun–Sep 1947
4-Month
72.4°F
(22.4°C)
71.6°F
(22.0°C)
0.8°F
(0.4°C)
83rd Coolest Coolest since: 1946 1915, 1924
44th Warmest Warmest since: 1944 1936
Ties: 1973, 1986
May–Sep 1947
5-Month
69.6°F
(20.9°C)
69.7°F
(20.9°C)
-0.1°F
(0.0°C)
53rd Coolest Coolest since: 1946 1924
74th Warmest Warmest since: 1944 1936
Ties: 1948, 1975
Apr–Sep 1947
6-Month
66.5°F
(19.2°C)
66.7°F
(19.3°C)
-0.2°F
(-0.1°C)
46th Coolest Coolest since: 1946 1907
81st Warmest Warmest since: 1944 2010
Ties: 1897, 1912, 1969, 2004
Mar–Sep 1947
7-Month
61.7°F
(16.5°C)
62.8°F
(17.1°C)
-1.1°F
(-0.6°C)
19th Coolest Coolest since: 1928 1924
108th Warmest Warmest since: 1946 2012
Ties: 1920, 1961, 1975, 1982
Feb–Sep 1947
8-Month
56.9°F
(13.8°C)
58.7°F
(14.8°C)
-1.8°F
(-1.0°C)
15th Coolest Coolest since: 1924 1904
112th Warmest Warmest since: 1946 2012
Ties: 1951, 1989
Jan–Sep 1947
9-Month
53.9°F
(12.2°C)
54.9°F
(12.7°C)
-1.0°F
(-0.5°C)
27th Coolest Coolest since: 1940 1904, 1912
100th Warmest Warmest since: 1946 2012
Ties: 1994
Dec 1946–Sep 1947
10-Month
52.0°F
(11.1°C)
52.4°F
(11.3°C)
-0.4°F
(-0.2°C)
46th Coolest Coolest since: 1945 1904
80th Warmest Warmest since: 1946 2012
Ties: 1971, 1974, 2003
Nov 1946–Sep 1947
11-Month
51.2°F
(10.7°C)
51.3°F
(10.7°C)
-0.1°F
(0.0°C)
54th Coolest Coolest since: 1945 1904
72nd Warmest Warmest since: 1946 2012
Ties: 1901, 1903, 1916, 1966, 1989
Oct 1946–Sep 1947
12-Month
51.8°F
(11.0°C)
51.6°F
(10.9°C)
0.2°F
(0.1°C)
65th Coolest Coolest since: 1945 1904
61st Warmest Warmest since: 1946 2012
Ties: 1908, 1973, 2008
Apr 1946–Sep 1947
18-Month
56.5°F
(13.6°C)
56.6°F
(13.7°C)
-0.1°F
(-0.1°C)
48th Coolest Coolest since: 1946 1904, 1918
78th Warmest Warmest since: 1945 2012
Ties: 1906, 1950, 1959, 2001
Oct 1945–Sep 1947
24-Month
51.9°F
(11.1°C)
51.6°F
(10.9°C)
0.3°F
(0.2°C)
79th Coolest Coolest since: 1946 1979
46th Warmest Warmest since: 1943 2017
Ties: 1940, 1957, 1974, 1984, 1995
Oct 1944–Sep 1947
36-Month
51.6°F
(10.9°C)
51.6°F
(10.9°C)
0.0°F
(0.0°C)
55th Coolest Coolest since: 1945 1979
69th Warmest Warmest since: 1946 2018
Ties: 1916, 1937, 1953, 1959, 1983, 1995, 1998
Oct 1943–Sep 1947
48-Month
51.7°F
(10.9°C)
51.5°F
(10.8°C)
0.2°F
(0.1°C)
55th Coolest Coolest since: 1946 1905
68th Warmest Warmest since: 1945 2019
Ties: 1911, 1948, 1983, 1995
Oct 1942–Sep 1947
60-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
57th Coolest Coolest since: 1931 1906
65th Warmest Warmest since: 1946 2020
Ties: 1931, 1953, 1975, 1998

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2021, retrieved on January 16, 2021 from https://www.ncdc.noaa.gov/cag/