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, May 1999

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
May 1999
1-Month 		64.7°F
(18.2°C)		 63.2°F
(17.3°C)		 1.5°F
(0.9°C)		 81st Coolest
Coolest since:
 1924
48th Warmest
Warmest since:
 2018
Ties: 2014
Apr–May 1999
2-Month 		60.1°F
(15.6°C)		 58.0°F
(14.4°C)		 2.1°F
(1.2°C)		 105th Coolest
Coolest since:
 1907
24th Warmest
Warmest since:
 1896
Ties: 1906
Mar–May 1999
3-Month 		53.3°F
(11.8°C)		 52.6°F
(11.4°C)		 0.7°F
(0.4°C)		 78th Coolest
Coolest since:
 1960
51st Warmest
Warmest since:
 2012
Ties: 1927, 1930, 1995
Feb–May 1999
4-Month 		49.6°F
(9.8°C)		 47.3°F
(8.5°C)		 2.3°F
(1.3°C)		 112th Coolest
Coolest since:
 1978
17th Warmest
Warmest since:
 2012
Ties: 1922, 1955, 1986, 1992, 2001
Jan–May 1999
5-Month 		45.4°F
(7.4°C)		 43.4°F
(6.3°C)		 2.0°F
(1.1°C)		 102nd Coolest
Coolest since:
 1978
27th Warmest
Warmest since:
 2012
Ties: 2002
Dec 1998–May 1999
6-Month 		43.9°F
(6.6°C)		 41.4°F
(5.2°C)		 2.5°F
(1.4°C)		 113th Coolest
Coolest since:
 1978
15th Warmest
Warmest since:
 2012
Ties: 1938, 1953, 2020
Nov 1998–May 1999
7-Month 		44.3°F
(6.8°C)		 41.5°F
(5.3°C)		 2.8°F
(1.5°C)		 116th Coolest
Coolest since:
 1978
12th Warmest
Warmest since:
 2012
Ties: 2007
Oct 1998–May 1999
8-Month 		46.0°F
(7.8°C)		 43.3°F
(6.3°C)		 2.7°F
(1.5°C)		 118th Coolest
Coolest since:
 1978
10th Warmest
Warmest since:
 2012
Ties: 2006
Sep 1998–May 1999
9-Month 		48.9°F
(9.4°C)		 46.0°F
(7.8°C)		 2.9°F
(1.6°C)		 122nd Coolest
Coolest since:
 1978
6th Warmest
Warmest since:
 2012
Ties: 1991, 2000
Aug 1998–May 1999
10-Month 		51.5°F
(10.8°C)		 48.8°F
(9.3°C)		 2.7°F
(1.5°C)		 121st Coolest
Coolest since:
 1978
7th Warmest
Warmest since:
 2012
Jul 1998–May 1999
11-Month 		53.8°F
(12.1°C)		 51.3°F
(10.7°C)		 2.5°F
(1.4°C)		 122nd Coolest
Coolest since:
 1904
6th Warmest
Warmest since:
 2012
Ties: 2000
Jun 1998–May 1999
12-Month 		55.4°F
(13.0°C)		 53.1°F
(11.7°C)		 2.3°F
(1.3°C)		 121st Coolest
Coolest since:
 1904
7th Warmest
Warmest since:
 2012
Ties: 2000
Dec 1997–May 1999
18-Month 		52.1°F
(11.2°C)		 49.2°F
(9.6°C)		 2.9°F
(1.6°C)		 125th Coolest
Coolest since:
 1979
2nd Warmest
Warmest to Date
 2017
Ties: 2012, 2013
Jun 1997–May 1999
24-Month 		55.0°F
(12.8°C)		 53.1°F
(11.7°C)		 1.9°F
(1.1°C)		 116th Coolest
Coolest since:
 1905, 1978
11th Warmest
Warmest since:
 2017
Ties: 2007
Jun 1996–May 1999
36-Month 		54.1°F
(12.3°C)		 53.0°F
(11.7°C)		 1.1°F
(0.6°C)		 100th Coolest
Coolest since:
 1979
26th Warmest
Warmest since:
 2018
Ties: 1954, 2020
Jun 1995–May 1999
48-Month 		53.6°F
(12.0°C)		 53.0°F
(11.7°C)		 0.6°F
(0.3°C)		 83rd Coolest
Coolest since:
 1980
42nd Warmest
Warmest since:
 2019
Ties: 1940, 1950, 1958, 1987, 1994
Jun 1994–May 1999
60-Month 		53.7°F
(12.1°C)		 53.0°F
(11.7°C)		 0.7°F
(0.4°C)		 88th Coolest
Coolest since:
 1981
36th Warmest
Warmest since:
 2020
Ties: 1925, 1933, 1937, 1938, 1939, 1941, 1955, 1976, 1990, 1995, 2015

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