Divisional Rankings

Divisional Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Illinois, Climate Division 7. East Southeast

Average Temperature Rankings, September 2021

View Period (Months):
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 2021
1-Month
69.9°F
(21.1°C)
67.4°F
(19.7°C)
2.5°F
(1.4°C)
97th Coolest
Coolest since:
1918
32nd Warmest
Warmest since:
1925
Aug–Sep 2021
2-Month
73.0°F
(22.8°C)
70.8°F
(21.6°C)
2.2°F
(1.2°C)
104th Coolest
Coolest since:
1967
25th Warmest
Warmest since:
1936
Ties: 1938
Jul–Sep 2021
3-Month
73.7°F
(23.2°C)
72.6°F
(22.6°C)
1.1°F
(0.6°C)
93rd Coolest
Coolest since:
1967
36th Warmest
Warmest since:
1936
Ties: 1908, 1911, 1995
Jun–Sep 2021
4-Month
73.9°F
(23.3°C)
72.6°F
(22.6°C)
1.3°F
(0.7°C)
99th Coolest
Coolest since:
1967
30th Warmest
Warmest since:
1936
Ties: 1900, 1959, 1987, 2019
May–Sep 2021
5-Month
71.4°F
(21.9°C)
70.7°F
(21.5°C)
0.7°F
(0.4°C)
85th Coolest
Coolest since:
1924
44th Warmest
Warmest since:
1936
Ties: 1932, 2015
Apr–Sep 2021
6-Month
68.4°F
(20.2°C)
67.7°F
(19.8°C)
0.7°F
(0.4°C)
82nd Coolest
Coolest since:
1907
47th Warmest
Warmest since:
2010
Ties: 1895, 1919, 1965, 2022
Mar–Sep 2021
7-Month
65.5°F
(18.6°C)
64.0°F
(17.8°C)
1.5°F
(0.8°C)
110th Coolest
Coolest since:
1924
19th Warmest
Warmest since:
2012
Ties: 1959, 2005, 2011
Feb–Sep 2021
8-Month
60.3°F
(15.7°C)
59.9°F
(15.5°C)
0.4°F
(0.2°C)
72nd Coolest
Coolest since:
1904, 1924
57th Warmest
Warmest since:
2012
Ties: 1898, 1942, 1948
Jan–Sep 2021
9-Month
57.1°F
(13.9°C)
56.4°F
(13.6°C)
0.7°F
(0.3°C)
83rd Coolest
Coolest since:
1979
46th Warmest
Warmest since:
2012
Ties: 1908, 1914, 1936, 1988, 1995
Dec 2020–Sep 2021
10-Month
54.8°F
(12.7°C)
53.8°F
(12.1°C)
1.0°F
(0.6°C)
86th Coolest
Coolest since:
1904
42nd Warmest
Warmest since:
2012
Ties: 1942, 1973
Nov 2020–Sep 2021
11-Month
54.2°F
(12.3°C)
52.8°F
(11.6°C)
1.4°F
(0.7°C)
102nd Coolest
Coolest since:
1904
26th Warmest
Warmest since:
2012
Ties: 1925, 1931, 1939, 1949
Oct 2020–Sep 2021
12-Month
54.2°F
(12.3°C)
53.1°F
(11.7°C)
1.1°F
(0.6°C)
96th Coolest
Coolest since:
1904
32nd Warmest
Warmest since:
2012
Apr 2020–Sep 2021
18-Month
58.5°F
(14.7°C)
58.0°F
(14.4°C)
0.5°F
(0.3°C)
84th Coolest
Coolest since:
1918
44th Warmest
Warmest since:
2012
Ties: 1913, 1938, 1972, 1983, 2004
Oct 2019–Sep 2021
24-Month
54.1°F
(12.3°C)
53.1°F
(11.7°C)
1.0°F
(0.6°C)
100th Coolest
Coolest since:
1979
27th Warmest
Warmest since:
2017
Ties: 1914, 2003, 2011, 2019
Oct 2018–Sep 2021
36-Month
54.0°F
(12.2°C)
53.1°F
(11.7°C)
0.9°F
(0.5°C)
97th Coolest
Coolest since:
1979
29th Warmest
Warmest since:
2018
Ties: 1943, 1991, 1993
Oct 2017–Sep 2021
48-Month
54.1°F
(12.3°C)
53.0°F
(11.7°C)
1.1°F
(0.6°C)
106th Coolest
Coolest since:
1980
19th Warmest
Warmest since:
2019
Ties: 1988, 2006, 2009, 2022
Oct 2016–Sep 2021
60-Month
54.5°F
(12.5°C)
53.0°F
(11.7°C)
1.5°F
(0.8°C)
119th Coolest
Coolest since:
1982
5th Warmest
Warmest since:
2020
Ties: 1935, 2006

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