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 8. Southwest

Average Temperature Rankings, April 2021

View Period (Months):
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  • Record Coolest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
April 2021
1-Month
55.4°F
(13.0°C)
55.3°F
(12.9°C)
0.1°F
(0.1°C)
61st Coolest
Coolest since:
1907
68th Warmest
Warmest since:
1896
Ties: 1905, 1908, 1931, 1998
Mar–Apr 2021
2-Month
53.1°F
(11.7°C)
50.0°F
(10.0°C)
3.1°F
(1.7°C)
105th Coolest
Coolest since:
1926, 1960
24th Warmest
Warmest since:
2012
Feb–Apr 2021
3-Month
44.3°F
(6.8°C)
44.9°F
(7.2°C)
-0.6°F
(-0.4°C)
53rd Coolest
Coolest since:
1899
76th Warmest
Warmest since:
2012
Jan–Apr 2021
4-Month
41.8°F
(5.4°C)
41.4°F
(5.2°C)
0.4°F
(0.2°C)
69th Coolest
Coolest since:
1978
60th Warmest
Warmest since:
2012
Ties: 1903
Dec 2020–Apr 2021
5-Month
40.9°F
(4.9°C)
40.1°F
(4.5°C)
0.8°F
(0.4°C)
75th Coolest
Coolest since:
1978
53rd Warmest
Warmest since:
2012
Ties: 1931, 1986
Nov 2020–Apr 2021
6-Month
42.4°F
(5.8°C)
40.8°F
(4.9°C)
1.6°F
(0.9°C)
97th Coolest
Coolest since:
1912
31st Warmest
Warmest since:
2012
Oct 2020–Apr 2021
7-Month
44.3°F
(6.8°C)
43.2°F
(6.2°C)
1.1°F
(0.6°C)
92nd Coolest
Coolest since:
1899, 1978
36th Warmest
Warmest since:
2012
Ties: 1953
Sep 2020–Apr 2021
8-Month
47.3°F
(8.5°C)
46.4°F
(8.0°C)
0.9°F
(0.5°C)
86th Coolest
Coolest since:
1918
42nd Warmest
Warmest since:
2017
Aug 2020–Apr 2021
9-Month
50.4°F
(10.2°C)
49.8°F
(9.9°C)
0.6°F
(0.3°C)
82nd Coolest
Coolest since:
1918
46th Warmest
Warmest since:
2017
Ties: 1907, 1927, 1937, 1941, 1953, 1990
Jul 2020–Apr 2021
10-Month
53.3°F
(11.8°C)
52.6°F
(11.4°C)
0.7°F
(0.4°C)
83rd Coolest
Coolest since:
1918
45th Warmest
Warmest since:
2012
Ties: 1923, 1927, 1987
Jun 2020–Apr 2021
11-Month
55.3°F
(12.9°C)
54.5°F
(12.5°C)
0.8°F
(0.4°C)
84th Coolest
Coolest since:
1918
44th Warmest
Warmest since:
2012, 2017
May 2020–Apr 2021
12-Month
56.0°F
(13.3°C)
55.4°F
(13.0°C)
0.6°F
(0.3°C)
82nd Coolest
Coolest since:
1918
46th Warmest
Warmest since:
2012, 2017
Ties: 1927, 1989
Nov 2019–Apr 2021
18-Month
51.6°F
(10.9°C)
50.5°F
(10.3°C)
1.1°F
(0.6°C)
100th Coolest
Coolest since:
1979
27th Warmest
Warmest since:
2017
Ties: 1923, 1987
May 2019–Apr 2021
24-Month
56.5°F
(13.6°C)
55.3°F
(12.9°C)
1.2°F
(0.7°C)
106th Coolest
Coolest since:
1978
21st Warmest
Warmest since:
2017
Ties: 1942, 2016
May 2018–Apr 2021
36-Month
56.7°F
(13.7°C)
55.3°F
(12.9°C)
1.4°F
(0.8°C)
110th Coolest
Coolest since:
1979
16th Warmest
Warmest since:
2018
Ties: 1923, 1939, 2022
May 2017–Apr 2021
48-Month
56.4°F
(13.6°C)
55.3°F
(12.9°C)
1.1°F
(0.7°C)
104th Coolest
Coolest since:
1980
21st Warmest
Warmest since:
2019
Ties: 1933, 1992, 2003, 2005
May 2016–Apr 2021
60-Month
57.0°F
(13.9°C)
55.3°F
(12.9°C)
1.7°F
(1.0°C)
121st Coolest
Coolest since:
1980, 1981
3rd Warmest
Warmest since:
2020
Ties: 2019

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