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 1991

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
April 1991
1-Month
59.2°F
(15.1°C)
55.3°F
(12.9°C)
3.9°F
(2.2°C)
116th Coolest
Coolest since:
1907
13th Warmest
Warmest since:
1896
Ties: 1967
Mar–Apr 1991
2-Month
54.0°F
(12.2°C)
50.0°F
(10.0°C)
4.0°F
(2.2°C)
116th Coolest
Coolest since:
1926, 1960
13th Warmest
Warmest since:
2012
Ties: 1985, 2006
Feb–Apr 1991
3-Month
49.2°F
(9.6°C)
45.0°F
(7.2°C)
4.2°F
(2.4°C)
119th Coolest
Coolest since:
1899
10th Warmest
Warmest since:
2012
Jan–Apr 1991
4-Month
44.1°F
(6.7°C)
41.5°F
(5.3°C)
2.6°F
(1.4°C)
109th Coolest
Coolest since:
1978
20th Warmest
Warmest since:
2012
Ties: 1927
Dec 1990–Apr 1991
5-Month
42.4°F
(5.8°C)
40.1°F
(4.5°C)
2.3°F
(1.3°C)
106th Coolest
Coolest since:
1978
22nd Warmest
Warmest since:
2012
Ties: 1925
Nov 1990–Apr 1991
6-Month
43.8°F
(6.6°C)
40.9°F
(4.9°C)
2.9°F
(1.7°C)
117th Coolest
Coolest since:
1912
11th Warmest
Warmest since:
2012
Ties: 1999
Oct 1990–Apr 1991
7-Month
45.4°F
(7.4°C)
43.2°F
(6.2°C)
2.2°F
(1.2°C)
109th Coolest
Coolest since:
1899, 1978
19th Warmest
Warmest since:
2012
Ties: 2004, 2022
Sep 1990–Apr 1991
8-Month
48.6°F
(9.2°C)
46.5°F
(8.1°C)
2.1°F
(1.1°C)
112th Coolest
Coolest since:
1918
16th Warmest
Warmest since:
2017
Ties: 2022
Aug 1990–Apr 1991
9-Month
51.5°F
(10.8°C)
49.8°F
(9.9°C)
1.7°F
(0.9°C)
108th Coolest
Coolest since:
1918
20th Warmest
Warmest since:
2017
Ties: 1946, 2005, 2008
Jul 1990–Apr 1991
10-Month
54.0°F
(12.2°C)
52.6°F
(11.4°C)
1.4°F
(0.8°C)
107th Coolest
Coolest since:
1918
21st Warmest
Warmest since:
2012
Ties: 2004
Jun 1990–Apr 1991
11-Month
55.9°F
(13.3°C)
54.5°F
(12.5°C)
1.4°F
(0.8°C)
106th Coolest
Coolest since:
1918
22nd Warmest
Warmest since:
2012, 2017
Ties: 1953, 1976
May 1990–Apr 1991
12-Month
56.4°F
(13.6°C)
55.4°F
(13.0°C)
1.0°F
(0.6°C)
95th Coolest
Coolest since:
1918
33rd Warmest
Warmest since:
2012, 2017
Ties: 1914, 1923, 1938, 1987
Nov 1989–Apr 1991
18-Month
51.7°F
(10.9°C)
50.6°F
(10.3°C)
1.1°F
(0.6°C)
102nd Coolest
Coolest since:
1979
25th Warmest
Warmest since:
2017
Ties: 2001
May 1989–Apr 1991
24-Month
55.9°F
(13.3°C)
55.4°F
(13.0°C)
0.5°F
(0.3°C)
86th Coolest
Coolest since:
1978
41st Warmest
Warmest since:
2017
Ties: 1953, 2004
May 1988–Apr 1991
36-Month
55.9°F
(13.3°C)
55.3°F
(12.9°C)
0.6°F
(0.4°C)
86th Coolest
Coolest since:
1979
40th Warmest
Warmest since:
2018
Ties: 1936, 1937, 1942, 1976, 1993, 2003
May 1987–Apr 1991
48-Month
56.0°F
(13.3°C)
55.4°F
(13.0°C)
0.6°F
(0.3°C)
87th Coolest
Coolest since:
1980
38th Warmest
Warmest since:
2019
Ties: 1990, 2004
May 1986–Apr 1991
60-Month
56.1°F
(13.4°C)
55.4°F
(13.0°C)
0.7°F
(0.4°C)
92nd Coolest
Coolest since:
1980, 1981
32nd Warmest
Warmest since:
2020
Ties: 1925, 1937, 1941, 1955, 2000, 2005, 2011

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