Statewide Rankings

Statewide Data Info
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Illinois

Average Temperature Rankings, September 1981

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1981
1-Month
64.5°F
(18.1°C)
66.2°F
(19.0°C)
-1.7°F
(-0.9°C)
31st Coolest
Coolest since:
1918
98th Warmest
Warmest since:
1925, 1933
Ties: 1950
Aug–Sep 1981
2-Month
68.3°F
(20.2°C)
69.8°F
(21.0°C)
-1.5°F
(-0.8°C)
22nd Coolest
Coolest since:
1967
107th Warmest
Warmest since:
1936
Ties: 1896, 1903, 1962, 1993
Jul–Sep 1981
3-Month
70.4°F
(21.3°C)
71.7°F
(22.1°C)
-1.3°F
(-0.8°C)
21st Coolest
Coolest since:
1967
108th Warmest
Warmest since:
1936
Ties: 1965, 1982
Jun–Sep 1981
4-Month
71.0°F
(21.7°C)
71.7°F
(22.1°C)
-0.7°F
(-0.4°C)
41st Coolest
Coolest since:
1915, 1924
88th Warmest
Warmest since:
1936
Ties: 1979
May–Sep 1981
5-Month
68.5°F
(20.3°C)
69.7°F
(20.9°C)
-1.2°F
(-0.6°C)
23rd Coolest
Coolest since:
1924
106th Warmest
Warmest since:
1936
Ties: 1902, 2009
Apr–Sep 1981
6-Month
66.6°F
(19.2°C)
66.7°F
(19.3°C)
-0.1°F
(-0.1°C)
51st Coolest
Coolest since:
1907
78th Warmest
Warmest since:
2010
Ties: 1905, 1916, 1971, 1973, 2020
Mar–Sep 1981
7-Month
62.9°F
(17.2°C)
62.9°F
(17.2°C)
0.0°F
(0.0°C)
57th Coolest
Coolest since:
1924
72nd Warmest
Warmest since:
2012
Ties: 1918, 1949, 1956, 1957
Feb–Sep 1981
8-Month
59.0°F
(15.0°C)
58.7°F
(14.8°C)
0.3°F
(0.2°C)
74th Coolest
Coolest since:
1904
55th Warmest
Warmest since:
2012
Ties: 1908, 1948
Jan–Sep 1981
9-Month
55.2°F
(12.9°C)
54.9°F
(12.7°C)
0.3°F
(0.2°C)
68th Coolest
Coolest since:
1904, 1912
61st Warmest
Warmest since:
2012
Ties: 1956
Dec 1980–Sep 1981
10-Month
52.8°F
(11.6°C)
52.4°F
(11.3°C)
0.4°F
(0.3°C)
73rd Coolest
Coolest since:
1904
55th Warmest
Warmest since:
2012
Ties: 1898
Nov 1980–Sep 1981
11-Month
51.7°F
(10.9°C)
51.4°F
(10.8°C)
0.3°F
(0.1°C)
74th Coolest
Coolest since:
1904
54th Warmest
Warmest since:
2012
Ties: 1935, 1992, 2011
Oct 1980–Sep 1981
12-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
60th Coolest
Coolest since:
1904
68th Warmest
Warmest since:
2012
Ties: 1980
Apr 1980–Sep 1981
18-Month
57.1°F
(13.9°C)
56.7°F
(13.7°C)
0.4°F
(0.2°C)
77th Coolest
Coolest since:
1904, 1918
51st Warmest
Warmest since:
2012
Ties: 1900, 1923, 1972
Oct 1979–Sep 1981
24-Month
51.7°F
(10.9°C)
51.6°F
(10.9°C)
0.1°F
(0.0°C)
58th Coolest
Coolest since:
1979
69th Warmest
Warmest since:
2017
Ties: 1909, 1911, 1915, 1920, 1936, 1944, 1990
Oct 1978–Sep 1981
36-Month
50.8°F
(10.4°C)
51.6°F
(10.9°C)
-0.8°F
(-0.5°C)
13th Coolest
Coolest since:
1979
113th Warmest
Warmest since:
2018
Ties: 1907, 1920, 1960, 1963, 1970, 1971, 2015
Oct 1977–Sep 1981
48-Month
50.4°F
(10.2°C)
51.6°F
(10.9°C)
-1.2°F
(-0.7°C)
8th Coolest
Coolest since:
1905
117th Warmest
Warmest since:
2019
Oct 1976–Sep 1981
60-Month
50.4°F
(10.2°C)
51.6°F
(10.9°C)
-1.2°F
(-0.7°C)
4th Coolest
Coolest since:
1906
120th Warmest
Warmest since:
2020
Ties: 1907, 1908

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