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 2022. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 1940

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
September 1940
1-Month
65.5°F
(18.6°C)
66.2°F
(19.0°C)
-0.7°F
(-0.4°C)
47th Coolest Coolest since: 1937 1918
81st Warmest Warmest since: 1939 1925, 1933
Aug–Sep 1940
2-Month
69.8°F
(21.0°C)
69.9°F
(21.1°C)
-0.1°F
(-0.1°C)
65th Coolest Coolest since: 1934 1967
63rd Warmest Warmest since: 1939 1936
Ties: 1956
Jul–Sep 1940
3-Month
71.9°F
(22.2°C)
71.8°F
(22.1°C)
0.1°F
(0.1°C)
70th Coolest Coolest since: 1932 1967
58th Warmest Warmest since: 1939 1936
Ties: 2020
Jun–Sep 1940
4-Month
72.0°F
(22.2°C)
71.7°F
(22.1°C)
0.3°F
(0.1°C)
76th Coolest Coolest since: 1937 1915, 1924
52nd Warmest Warmest since: 1939 1936
Ties: 1906, 1937, 1948, 2015, 2017
May–Sep 1940
5-Month
69.4°F
(20.8°C)
69.8°F
(21.0°C)
-0.4°F
(-0.2°C)
47th Coolest Coolest since: 1935 1924
81st Warmest Warmest since: 1939 1936
Ties: 1972, 1993
Apr–Sep 1940
6-Month
66.1°F
(18.9°C)
66.7°F
(19.3°C)
-0.6°F
(-0.4°C)
38th Coolest Coolest since: 1935 1907
90th Warmest Warmest since: 1939 2010
Ties: 2003
Mar–Sep 1940
7-Month
61.8°F
(16.6°C)
62.8°F
(17.1°C)
-1.0°F
(-0.5°C)
24th Coolest Coolest since: 1928 1924
104th Warmest Warmest since: 1939 2012
Ties: 1966, 1969, 1993, 2014
Feb–Sep 1940
8-Month
57.8°F
(14.3°C)
58.7°F
(14.8°C)
-0.9°F
(-0.5°C)
32nd Coolest Coolest since: 1929 1904
96th Warmest Warmest since: 1939 2012
Ties: 1895, 1916
Jan–Sep 1940
9-Month
52.8°F
(11.6°C)
55.0°F
(12.8°C)
-2.2°F
(-1.2°C)
9th Coolest Coolest since: 1924 1904, 1912
119th Warmest Warmest since: 1939 2012
Dec 1939–Sep 1940
10-Month
50.9°F
(10.5°C)
52.4°F
(11.3°C)
-1.5°F
(-0.8°C)
18th Coolest Coolest since: 1924 1904
109th Warmest Warmest since: 1939 2012
Nov 1939–Sep 1940
11-Month
49.9°F
(9.9°C)
51.3°F
(10.7°C)
-1.4°F
(-0.8°C)
15th Coolest Coolest since: 1924 1904
112th Warmest Warmest since: 1939 2012
Ties: 1915, 1984
Oct 1939–Sep 1940
12-Month
50.5°F
(10.3°C)
51.7°F
(10.9°C)
-1.2°F
(-0.6°C)
21st Coolest Coolest since: 1926 1904
106th Warmest Warmest since: 1939 2012
Ties: 1907, 1915, 1970, 1997
Apr 1939–Sep 1940
18-Month
56.2°F
(13.4°C)
56.7°F
(13.7°C)
-0.5°F
(-0.3°C)
39th Coolest Coolest since: 1936 1904, 1918
88th Warmest Warmest since: 1939 2012
Ties: 1907, 2015
Oct 1938–Sep 1940
24-Month
51.9°F
(11.1°C)
51.6°F
(10.9°C)
0.3°F
(0.2°C)
79th Coolest Coolest since: 1937 1979
47th Warmest Warmest since: 1939 2017
Ties: 1947, 1957, 1974, 1984, 1995
Oct 1937–Sep 1940
36-Month
52.2°F
(11.2°C)
51.6°F
(10.9°C)
0.6°F
(0.3°C)
86th Coolest Coolest since: 1938 1979
39th Warmest Warmest since: 1939 2018
Oct 1936–Sep 1940
48-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
79th Coolest Coolest since: 1938 1905
45th Warmest Warmest since: 1939 2019
Ties: 1949, 1976, 1986, 1998, 2011
Oct 1935–Sep 1940
60-Month
51.8°F
(11.0°C)
51.6°F
(10.9°C)
0.2°F
(0.1°C)
65th Coolest Coolest since: 1931 1906
58th Warmest Warmest since: 1939 2020
Ties: 1924, 1948, 1949

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, Average Temperature, published September 2022, retrieved on September 24, 2022 from https://www.ncdc.noaa.gov/cag/