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


Illinois

Average Temperature Rankings, September 1903

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1903
1-Month
64.9°F
(18.3°C)
66.2°F
(19.0°C)
-1.3°F
(-0.7°C)
38th Coolest Coolest since: 1902 1918
89th Warmest Warmest since: 1901 1925, 1933
Ties: 2012
Aug–Sep 1903
2-Month
68.2°F
(20.1°C)
69.8°F
(21.0°C)
-1.6°F
(-0.9°C)
20th Coolest Coolest since: 1902 1967
107th Warmest Warmest since: 1901 1936
Ties: 1896, 1929, 1962, 1975, 1981, 1993
Jul–Sep 1903
3-Month
70.6°F
(21.4°C)
71.8°F
(22.1°C)
-1.2°F
(-0.7°C)
28th Coolest Coolest since: 1902 1967
99th Warmest Warmest since: 1901 1936
Ties: 1907, 1928, 1929, 1949, 1963
Jun–Sep 1903
4-Month
69.3°F
(20.7°C)
71.6°F
(22.0°C)
-2.3°F
(-1.3°C)
8th Coolest Coolest since: 1902 1915, 1924
119th Warmest Warmest since: 1901 1936
Ties: 1904
May–Sep 1903
5-Month
68.3°F
(20.2°C)
69.7°F
(20.9°C)
-1.4°F
(-0.7°C)
19th Coolest Coolest to Date 1924
108th Warmest Warmest since: 1902 1936
Ties: 1966, 1989
Apr–Sep 1903
6-Month
65.6°F
(18.7°C)
66.7°F
(19.3°C)
-1.1°F
(-0.6°C)
26th Coolest Coolest since: 1902 1907
101st Warmest Warmest since: 1901 2010
Ties: 1926, 1929
Mar–Sep 1903
7-Month
62.5°F
(16.9°C)
62.9°F
(17.2°C)
-0.4°F
(-0.3°C)
46th Coolest Coolest since: 1902 1924
81st Warmest Warmest since: 1901 2012
Ties: 1897, 1935, 1937, 1978, 2009
Feb–Sep 1903
8-Month
58.0°F
(14.4°C)
58.7°F
(14.8°C)
-0.7°F
(-0.4°C)
37th Coolest Coolest since: 1902 1904
90th Warmest Warmest since: 1901 2012
Ties: 1900, 1901, 1909, 1972, 2013
Jan–Sep 1903
9-Month
54.3°F
(12.4°C)
54.9°F
(12.7°C)
-0.6°F
(-0.3°C)
39th Coolest Coolest since: 1902 1904, 1912
88th Warmest Warmest since: 1901 2012
Ties: 1923, 1965, 1972, 1985, 2008
Dec 1902–Sep 1903
10-Month
51.6°F
(10.9°C)
52.4°F
(11.3°C)
-0.8°F
(-0.4°C)
30th Coolest Coolest since: 1902 1904
96th Warmest Warmest since: 1901 2012
Ties: 1945, 1961, 1965
Nov 1902–Sep 1903
11-Month
51.2°F
(10.7°C)
51.4°F
(10.8°C)
-0.2°F
(-0.1°C)
54th Coolest Coolest since: 1902 1904
72nd Warmest Warmest since: 1901 2012
Ties: 1901, 1916, 1947, 1966, 1989
Oct 1902–Sep 1903
12-Month
51.5°F
(10.8°C)
51.6°F
(10.9°C)
-0.1°F
(-0.1°C)
55th Coolest Coolest since: 1902 1904
71st Warmest Warmest since: 1901 2012
Apr 1902–Sep 1903
18-Month
56.1°F
(13.4°C)
56.6°F
(13.7°C)
-0.5°F
(-0.3°C)
36th Coolest Coolest since: 1902 1904, 1918
90th Warmest Warmest since: 1901 2012
Ties: 1916, 2009
Oct 1901–Sep 1903
24-Month
50.5°F
(10.3°C)
51.6°F
(10.9°C)
-1.1°F
(-0.6°C)
10th Coolest Coolest to Date 1979
115th Warmest Warmest since: 1902 2017
Ties: 1913, 1951
Oct 1900–Sep 1903
36-Month
51.0°F
(10.6°C)
51.6°F
(10.9°C)
-0.6°F
(-0.3°C)
23rd Coolest Coolest since: 1899 1979
101st Warmest Warmest since: 1902 2018
Ties: 1899, 1929
Oct 1899–Sep 1903
48-Month
51.3°F
(10.7°C)
51.6°F
(10.9°C)
-0.3°F
(-0.2°C)
34th Coolest Coolest since: 1902 1905
89th Warmest Warmest since: 1901 2019
Ties: 1900, 1909, 1928, 1930, 1951, 1960, 1964, 1965, 1984
Oct 1898–Sep 1903
60-Month
50.9°F
(10.5°C)
51.6°F
(10.9°C)
-0.7°F
(-0.4°C)
13th Coolest Coolest to Date 1906
109th Warmest Warmest since: 1902 2020
Ties: 1962, 1963, 1970, 1971

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published June 2021, retrieved on June 15, 2021 from https://www.ncdc.noaa.gov/cag/