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 2020. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 1949

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
September 1949
1-Month
60.4°F
(15.8°C)
66.2°F
(19.0°C)
-5.8°F
(-3.2°C)
2nd Coolest Coolest since: 1918 1918
124th Warmest Warmest since: 1948 1925, 1933
Aug–Sep 1949
2-Month
67.0°F
(19.4°C)
69.8°F
(21.0°C)
-2.8°F
(-1.6°C)
6th Coolest Coolest since: 1924 1967
120th Warmest Warmest since: 1948 1936
Ties: 1924, 1966
Jul–Sep 1949
3-Month
70.6°F
(21.4°C)
71.7°F
(22.1°C)
-1.1°F
(-0.7°C)
28th Coolest Coolest since: 1946 1967
98th Warmest Warmest since: 1948 1936
Ties: 1903, 1907, 1928, 1929, 1963
Jun–Sep 1949
4-Month
71.5°F
(21.9°C)
71.7°F
(22.1°C)
-0.2°F
(-0.2°C)
51st Coolest Coolest since: 1946 1915, 1924
75th Warmest Warmest since: 1948 1936
Ties: 1905, 1968, 2013
May–Sep 1949
5-Month
70.0°F
(21.1°C)
69.7°F
(20.9°C)
0.3°F
(0.2°C)
70th Coolest Coolest since: 1948 1924
56th Warmest Warmest since: 1944 1936
Ties: 1943, 2013, 2017
Apr–Sep 1949
6-Month
66.8°F
(19.3°C)
66.7°F
(19.3°C)
0.1°F
(0.0°C)
63rd Coolest Coolest since: 1947 1907
63rd Warmest Warmest since: 1948 2010
Ties: 1898, 1908, 1937, 1957, 1995, 2000
Mar–Sep 1949
7-Month
62.9°F
(17.2°C)
62.8°F
(17.1°C)
0.1°F
(0.1°C)
57th Coolest Coolest since: 1947 1924
69th Warmest Warmest since: 1948 2012
Ties: 1918, 1956, 1957, 1981
Feb–Sep 1949
8-Month
58.8°F
(14.9°C)
58.6°F
(14.8°C)
0.2°F
(0.1°C)
69th Coolest Coolest since: 1947 1904
57th Warmest Warmest since: 1948 2012
Ties: 1927, 1945, 1985, 2009
Jan–Sep 1949
9-Month
55.5°F
(13.1°C)
55.0°F
(12.8°C)
0.5°F
(0.3°C)
79th Coolest Coolest since: 1948 1904, 1912
47th Warmest Warmest since: 1946 2012
Ties: 1976, 1995, 2019
Dec 1948–Sep 1949
10-Month
53.2°F
(11.8°C)
52.4°F
(11.3°C)
0.8°F
(0.5°C)
83rd Coolest Coolest since: 1948 1904
42nd Warmest Warmest since: 1944 2012
Ties: 1908, 1913, 1976
Nov 1948–Sep 1949
11-Month
52.3°F
(11.3°C)
51.4°F
(10.8°C)
0.9°F
(0.5°C)
90th Coolest Coolest since: 1948 1904
35th Warmest Warmest since: 1942 2012
Ties: 1942
Oct 1948–Sep 1949
12-Month
52.3°F
(11.3°C)
51.7°F
(10.9°C)
0.6°F
(0.4°C)
86th Coolest Coolest since: 1948 1904
39th Warmest Warmest since: 1942 2012
Ties: 1898, 1913, 1972, 1986, 1990
Apr 1948–Sep 1949
18-Month
57.3°F
(14.1°C)
56.7°F
(13.7°C)
0.6°F
(0.4°C)
86th Coolest Coolest since: 1948 1904, 1918
39th Warmest Warmest since: 1942 2012
Ties: 1901, 1957, 1964, 2010
Oct 1947–Sep 1949
24-Month
52.1°F
(11.2°C)
51.7°F
(10.9°C)
0.4°F
(0.3°C)
87th Coolest Coolest since: 1948 1979
37th Warmest Warmest since: 1943 2017
Ties: 1943, 1973, 1976, 1986, 2010
Oct 1946–Sep 1949
36-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
80th Coolest Coolest since: 1948 1979
43rd Warmest Warmest since: 1944 2018
Ties: 1931, 1974, 1976, 1990, 2010
Oct 1945–Sep 1949
48-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
79th Coolest Coolest since: 1948 1905
43rd Warmest Warmest since: 1944 2019
Ties: 1940, 1976, 1986, 1998, 2011
Oct 1944–Sep 1949
60-Month
51.8°F
(11.0°C)
51.6°F
(10.9°C)
0.2°F
(0.1°C)
65th Coolest Coolest since: 1948 1906
56th Warmest Warmest since: 1948 2002
Ties: 1924, 1940, 1948

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2020, retrieved on September 26, 2020 from https://www.ncdc.noaa.gov/cag/