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, August 2019

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
August 2019
1-Month 		76.4°F
(24.7°C)		 76.0°F
(24.4°C)		 0.4°F
(0.3°C)		 77th Coolest
Coolest since:
 1915
52nd Warmest
Warmest since:
 1936
Ties: 1940, 1968, 1984
Jul–Aug 2019
2-Month 		77.6°F
(25.3°C)		 77.0°F
(25.0°C)		 0.6°F
(0.3°C)		 87th Coolest
Coolest since:
 1967
42nd Warmest
Warmest since:
 1936
Ties: 1977, 1991, 1999
Jun–Aug 2019
3-Month 		76.1°F
(24.5°C)		 75.9°F
(24.4°C)		 0.2°F
(0.1°C)		 69th Coolest
Coolest since:
 1915, 1927
60th Warmest
Warmest since:
 1936
Ties: 1956, 2001, 2015
May–Aug 2019
4-Month 		73.9°F
(23.3°C)		 73.2°F
(22.9°C)		 0.7°F
(0.4°C)		 82nd Coolest
Coolest since:
 1967
47th Warmest
Warmest since:
 1936
Ties: 1916, 1949, 1955, 2015
Apr–Aug 2019
5-Month 		70.5°F
(21.4°C)		 69.6°F
(20.9°C)		 0.9°F
(0.5°C)		 83rd Coolest
Coolest since:
 1907
46th Warmest
Warmest since:
 2010
Ties: 1918
Mar–Aug 2019
6-Month 		65.8°F
(18.8°C)		 65.5°F
(18.6°C)		 0.3°F
(0.2°C)		 73rd Coolest
Coolest since:
 1904
56th Warmest
Warmest since:
 2012
Ties: 1919, 1932, 1957, 1981
Feb–Aug 2019
7-Month 		61.7°F
(16.5°C)		 61.1°F
(16.2°C)		 0.6°F
(0.3°C)		 83rd Coolest
Coolest since:
 1904
46th Warmest
Warmest since:
 2012
Ties: 1956, 1981, 1988
Jan–Aug 2019
8-Month 		58.1°F
(14.5°C)		 57.4°F
(14.1°C)		 0.7°F
(0.4°C)		 86th Coolest
Coolest since:
 1912
43rd Warmest
Warmest since:
 2012
Ties: 1931, 1992, 2022
Dec 2018–Aug 2019
9-Month 		56.0°F
(13.3°C)		 54.8°F
(12.7°C)		 1.2°F
(0.6°C)		 96th Coolest
Coolest since:
 1904
32nd Warmest
Warmest since:
 2012
Ties: 1983
Nov 2018–Aug 2019
10-Month 		54.4°F
(12.4°C)		 53.8°F
(12.1°C)		 0.6°F
(0.3°C)		 78th Coolest
Coolest since:
 1904
50th Warmest
Warmest since:
 2012
Ties: 1911, 1913, 1931, 1942
Oct 2018–Aug 2019
11-Month 		54.7°F
(12.6°C)		 54.1°F
(12.3°C)		 0.6°F
(0.3°C)		 77th Coolest
Coolest since:
 1904
51st Warmest
Warmest since:
 2012
Ties: 1898, 1909, 1913, 1930
Sep 2018–Aug 2019
12-Month 		56.3°F
(13.5°C)		 55.4°F
(13.0°C)		 0.9°F
(0.5°C)		 92nd Coolest
Coolest since:
 1904
36th Warmest
Warmest since:
 2012
Ties: 1898, 1901
Mar 2018–Aug 2019
18-Month 		59.7°F
(15.4°C)		 58.7°F
(14.8°C)		 1.0°F
(0.6°C)		 95th Coolest
Coolest since:
 1904
33rd Warmest
Warmest since:
 2012
Sep 2017–Aug 2019
24-Month 		56.4°F
(13.6°C)		 55.3°F
(12.9°C)		 1.1°F
(0.7°C)		 100th Coolest
Coolest since:
 1979
27th Warmest
Warmest since:
 2017
Ties: 1953, 1988, 2008
Sep 2016–Aug 2019
36-Month 		57.2°F
(14.0°C)		 55.3°F
(12.9°C)		 1.9°F
(1.1°C)		 119th Coolest
Coolest since:
 1979
7th Warmest
Warmest since:
 2018
Ties: 2013
Sep 2015–Aug 2019
48-Month 		57.6°F
(14.2°C)		 55.3°F
(12.9°C)		 2.3°F
(1.3°C)		 124th Coolest
Coolest since:
 1980
1st Warmest
Warmest to Date
 2019
Sep 2014–Aug 2019
60-Month 		57.1°F
(13.9°C)		 55.4°F
(13.0°C)		 1.7°F
(0.9°C)		 122nd Coolest
Coolest since:
 1906
2nd Warmest
Warmest to Date
 2020

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