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 1991

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
May 1991
1-Month 		70.0°F
(21.1°C)		 63.2°F
(17.3°C)		 6.8°F
(3.8°C)		 126th Coolest
Coolest since:
 1924
3rd Warmest
Warmest since:
 2018
Apr–May 1991
2-Month 		63.7°F
(17.6°C)		 58.0°F
(14.4°C)		 5.7°F
(3.2°C)		 126th Coolest
Coolest since:
 1907
3rd Warmest
Warmest since:
 1896
Mar–May 1991
3-Month 		57.7°F
(14.3°C)		 52.6°F
(11.4°C)		 5.1°F
(2.9°C)		 126th Coolest
Coolest since:
 1960
3rd Warmest
Warmest since:
 2012
Feb–May 1991
4-Month 		52.4°F
(11.3°C)		 47.3°F
(8.5°C)		 5.1°F
(2.8°C)		 127th Coolest
Coolest since:
 1978
2nd Warmest
Warmest to Date
 2012
Ties: 2017
Jan–May 1991
5-Month 		47.1°F
(8.4°C)		 43.4°F
(6.3°C)		 3.7°F
(2.1°C)		 123rd Coolest
Coolest since:
 1978
6th Warmest
Warmest since:
 2012
Ties: 1990
Dec 1990–May 1991
6-Month 		44.8°F
(7.1°C)		 41.4°F
(5.2°C)		 3.4°F
(1.9°C)		 121st Coolest
Coolest since:
 1978
7th Warmest
Warmest since:
 2012
Nov 1990–May 1991
7-Month 		45.3°F
(7.4°C)		 41.5°F
(5.3°C)		 3.8°F
(2.1°C)		 123rd Coolest
Coolest since:
 1978
5th Warmest
Warmest since:
 2012
Ties: 2000
Oct 1990–May 1991
8-Month 		46.4°F
(8.0°C)		 43.3°F
(6.3°C)		 3.1°F
(1.7°C)		 121st Coolest
Coolest since:
 1978
7th Warmest
Warmest since:
 2012
Sep 1990–May 1991
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: 1999, 2000
Aug 1990–May 1991
10-Month 		51.3°F
(10.7°C)		 48.8°F
(9.3°C)		 2.5°F
(1.4°C)		 120th Coolest
Coolest since:
 1978
8th Warmest
Warmest since:
 2012
Ties: 2000
Jul 1990–May 1991
11-Month 		53.5°F
(11.9°C)		 51.3°F
(10.7°C)		 2.2°F
(1.2°C)		 119th Coolest
Coolest since:
 1904
9th Warmest
Warmest since:
 2012
Ties: 1955
Jun 1990–May 1991
12-Month 		55.1°F
(12.8°C)		 53.1°F
(11.7°C)		 2.0°F
(1.1°C)		 117th Coolest
Coolest since:
 1904
11th Warmest
Warmest since:
 2012
Ties: 1922, 1992
Dec 1989–May 1991
18-Month 		50.9°F
(10.5°C)		 49.2°F
(9.6°C)		 1.7°F
(0.9°C)		 112th Coolest
Coolest since:
 1979
15th Warmest
Warmest since:
 2017
Ties: 1942
Jun 1989–May 1991
24-Month 		54.3°F
(12.4°C)		 53.1°F
(11.7°C)		 1.2°F
(0.7°C)		 109th Coolest
Coolest since:
 1905, 1978
18th Warmest
Warmest since:
 2017
Ties: 1956
Jun 1988–May 1991
36-Month 		54.0°F
(12.2°C)		 53.0°F
(11.7°C)		 1.0°F
(0.5°C)		 97th Coolest
Coolest since:
 1979
29th Warmest
Warmest since:
 2018
Ties: 1987, 1993, 2005, 2021
Jun 1987–May 1991
48-Month 		53.9°F
(12.2°C)		 53.0°F
(11.7°C)		 0.9°F
(0.5°C)		 98th Coolest
Coolest since:
 1980
27th Warmest
Warmest since:
 2019
Ties: 1924, 1988, 1993, 2017
Jun 1986–May 1991
60-Month 		54.1°F
(12.3°C)		 53.0°F
(11.7°C)		 1.1°F
(0.6°C)		 106th Coolest
Coolest since:
 1981
18th Warmest
Warmest since:
 2020
Ties: 1992, 2004, 2010

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