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


Illinois

Average Temperature Rankings, September 1966

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1966
1-Month
63.3°F
(17.4°C)
66.2°F
(19.0°C)
-2.9°F
(-1.6°C)
13th Coolest Coolest since: 1951 1918
114th Warmest Warmest since: 1965 1925, 1933
Ties: 1989, 1995
Aug–Sep 1966
2-Month
67.0°F
(19.4°C)
69.8°F
(21.0°C)
-2.8°F
(-1.6°C)
6th Coolest Coolest since: 1950 1967
121st Warmest Warmest since: 1965 1936
Ties: 1924, 1949
Jul–Sep 1966
3-Month
70.9°F
(21.6°C)
71.8°F
(22.1°C)
-0.9°F
(-0.5°C)
39th Coolest Coolest since: 1965 1967
88th Warmest Warmest since: 1964 1936
Ties: 1942, 1971
Jun–Sep 1966
4-Month
70.9°F
(21.6°C)
71.6°F
(22.0°C)
-0.7°F
(-0.4°C)
38th Coolest Coolest since: 1965 1915, 1924
89th Warmest Warmest since: 1964 1936
Ties: 1993, 1994
May–Sep 1966
5-Month
68.3°F
(20.2°C)
69.7°F
(20.9°C)
-1.4°F
(-0.7°C)
19th Coolest Coolest since: 1951 1924
108th Warmest Warmest since: 1965 1936
Ties: 1903, 1989
Apr–Sep 1966
6-Month
65.1°F
(18.4°C)
66.7°F
(19.3°C)
-1.6°F
(-0.9°C)
13th Coolest Coolest since: 1961 1907
114th Warmest Warmest since: 1965 2010
Mar–Sep 1966
7-Month
61.8°F
(16.6°C)
62.9°F
(17.2°C)
-1.1°F
(-0.6°C)
24th Coolest Coolest since: 1961 1924
103rd Warmest Warmest since: 1965 2012
Ties: 1940, 1969, 1993, 2014
Feb–Sep 1966
8-Month
57.7°F
(14.3°C)
58.7°F
(14.8°C)
-1.0°F
(-0.5°C)
28th Coolest Coolest since: 1965 1904
99th Warmest Warmest since: 1965 2012
Ties: 1905, 1965, 2008
Jan–Sep 1966
9-Month
53.5°F
(11.9°C)
54.9°F
(12.7°C)
-1.4°F
(-0.8°C)
19th Coolest Coolest since: 1960 1904, 1912
108th Warmest Warmest since: 1965 2012
Ties: 1951, 1996
Dec 1965–Sep 1966
10-Month
51.9°F
(11.1°C)
52.4°F
(11.3°C)
-0.5°F
(-0.2°C)
41st Coolest Coolest since: 1965 1904
85th Warmest Warmest since: 1964 2012
Ties: 1916, 1923, 1943, 2008
Nov 1965–Sep 1966
11-Month
51.2°F
(10.7°C)
51.4°F
(10.8°C)
-0.2°F
(-0.1°C)
54th Coolest Coolest since: 1965 1904
72nd Warmest Warmest since: 1964 2012
Ties: 1901, 1903, 1916, 1947, 1989
Oct 1965–Sep 1966
12-Month
51.4°F
(10.8°C)
51.6°F
(10.9°C)
-0.2°F
(-0.1°C)
51st Coolest Coolest since: 1965 1904
75th Warmest Warmest since: 1964 2012
Ties: 1906, 1943, 1950
Apr 1965–Sep 1966
18-Month
56.6°F
(13.7°C)
56.6°F
(13.7°C)
0.0°F
(0.0°C)
53rd Coolest Coolest since: 1963 1904, 1918
73rd Warmest Warmest since: 1965 2012
Ties: 1925, 1930, 1943, 1971, 1973, 1985
Oct 1964–Sep 1966
24-Month
51.2°F
(10.7°C)
51.6°F
(10.9°C)
-0.4°F
(-0.2°C)
38th Coolest Coolest since: 1963 1979
87th Warmest Warmest since: 1965 2017
Ties: 1908, 1985
Oct 1963–Sep 1966
36-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
67th Coolest Coolest since: 1965 1979
57th Warmest Warmest since: 1957 2018
Ties: 1898, 1911, 1946, 1975
Oct 1962–Sep 1966
48-Month
51.4°F
(10.8°C)
51.6°F
(10.9°C)
-0.2°F
(-0.1°C)
44th Coolest Coolest since: 1965 1905
79th Warmest Warmest since: 1959 2019
Ties: 1901, 1952, 1985
Oct 1961–Sep 1966
60-Month
51.3°F
(10.7°C)
51.6°F
(10.9°C)
-0.3°F
(-0.2°C)
35th Coolest Coolest since: 1965 1906
87th Warmest Warmest since: 1960 2020
Ties: 1900, 1910, 1960, 1967, 1973

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2021, retrieved on September 25, 2021 from https://www.ncdc.noaa.gov/cag/