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 5. East

Average Temperature Rankings, May 2020

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
May 2020
1-Month 		59.5°F
(15.3°C)		 61.0°F
(16.1°C)		 -1.5°F
(-0.8°C)		 43rd Coolest
Coolest since:
 1907
86th Warmest
Warmest since:
 2018
Ties: 1994
Apr–May 2020
2-Month 		53.8°F
(12.1°C)		 55.5°F
(13.1°C)		 -1.7°F
(-1.0°C)		 26th Coolest
Coolest since:
 1907
103rd Warmest
Warmest since:
 1977
Mar–May 2020
3-Month 		50.0°F
(10.0°C)		 49.7°F
(9.8°C)		 0.3°F
(0.2°C)		 68th Coolest
Coolest since:
 1960
61st Warmest
Warmest since:
 2012
Ties: 1933, 1968
Feb–May 2020
4-Month 		45.1°F
(7.3°C)		 44.2°F
(6.8°C)		 0.9°F
(0.5°C)		 84th Coolest
Coolest since:
 1978
45th Warmest
Warmest since:
 2012
Ties: 1903, 1952, 2022
Jan–May 2020
5-Month 		42.3°F
(5.7°C)		 40.1°F
(4.5°C)		 2.2°F
(1.2°C)		 108th Coolest
Coolest since:
 1978
21st Warmest
Warmest since:
 2012
Ties: 1933, 1953, 1955, 1973, 1976, 2002
Dec 2019–May 2020
6-Month 		40.9°F
(4.9°C)		 38.1°F
(3.4°C)		 2.8°F
(1.5°C)		 113th Coolest
Coolest since:
 1904, 1978
15th Warmest
Warmest since:
 2012
Nov 2019–May 2020
7-Month 		40.1°F
(4.5°C)		 38.3°F
(3.5°C)		 1.8°F
(1.0°C)		 100th Coolest
Coolest since:
 1904
28th Warmest
Warmest since:
 2012
Oct 2019–May 2020
8-Month 		41.8°F
(5.4°C)		 40.2°F
(4.6°C)		 1.6°F
(0.8°C)		 101st Coolest
Coolest since:
 1904
27th Warmest
Warmest since:
 2012
Ties: 1949, 1972, 1974
Sep 2019–May 2020
9-Month 		44.9°F
(7.2°C)		 43.0°F
(6.1°C)		 1.9°F
(1.1°C)		 108th Coolest
Coolest since:
 1904
20th Warmest
Warmest since:
 2012
Ties: 1995
Aug 2019–May 2020
10-Month 		47.6°F
(8.7°C)		 45.9°F
(7.7°C)		 1.7°F
(1.0°C)		 107th Coolest
Coolest since:
 1904
21st Warmest
Warmest since:
 2012
Ties: 2005
Jul 2019–May 2020
11-Month 		50.2°F
(10.1°C)		 48.5°F
(9.2°C)		 1.7°F
(0.9°C)		 108th Coolest
Coolest since:
 1904
20th Warmest
Warmest since:
 2012
Jun 2019–May 2020
12-Month 		51.9°F
(11.1°C)		 50.3°F
(10.2°C)		 1.6°F
(0.9°C)		 109th Coolest
Coolest since:
 1904
19th Warmest
Warmest since:
 2012
Dec 2018–May 2020
18-Month 		47.5°F
(8.6°C)		 46.2°F
(7.9°C)		 1.3°F
(0.7°C)		 99th Coolest
Coolest since:
 1905
28th Warmest
Warmest since:
 2017
Ties: 1935, 1953, 2002
Jun 2018–May 2020
24-Month 		51.5°F
(10.8°C)		 50.3°F
(10.2°C)		 1.2°F
(0.6°C)		 104th Coolest
Coolest since:
 1905
23rd Warmest
Warmest since:
 2017
Ties: 1956, 1987, 2001, 2008
Jun 2017–May 2020
36-Month 		51.4°F
(10.8°C)		 50.3°F
(10.2°C)		 1.1°F
(0.6°C)		 98th Coolest
Coolest since:
 1905, 1906
28th Warmest
Warmest since:
 2018
Ties: 1935, 1957, 1988
Jun 2016–May 2020
48-Month 		52.2°F
(11.2°C)		 50.3°F
(10.2°C)		 1.9°F
(1.0°C)		 123rd Coolest
Coolest since:
 1905
2nd Warmest
Warmest since:
 2019
Ties: 2018
Jun 2015–May 2020
60-Month 		52.5°F
(11.4°C)		 50.3°F
(10.2°C)		 2.2°F
(1.2°C)		 123rd Coolest
Coolest since:
 1905, 1906, 1908
1st Warmest
Warmest to Date
 2020

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