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 1987

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
August 1987
1-Month 		77.8°F
(25.4°C)		 76.0°F
(24.4°C)		 1.8°F
(1.0°C)		 99th Coolest
Coolest since:
 1915
30th Warmest
Warmest since:
 1936
Jul–Aug 1987
2-Month 		78.0°F
(25.6°C)		 76.9°F
(24.9°C)		 1.1°F
(0.7°C)		 94th Coolest
Coolest since:
 1967
35th Warmest
Warmest since:
 1936
Jun–Aug 1987
3-Month 		77.6°F
(25.3°C)		 76.0°F
(24.4°C)		 1.6°F
(0.9°C)		 103rd Coolest
Coolest since:
 1915, 1927
26th Warmest
Warmest since:
 1936
Ties: 2018
May–Aug 1987
4-Month 		76.0°F
(24.4°C)		 73.2°F
(22.9°C)		 2.8°F
(1.5°C)		 122nd Coolest
Coolest since:
 1967
7th Warmest
Warmest since:
 1936
Apr–Aug 1987
5-Month 		71.9°F
(22.2°C)		 69.6°F
(20.9°C)		 2.3°F
(1.3°C)		 117th Coolest
Coolest since:
 1907
12th Warmest
Warmest since:
 2010
Mar–Aug 1987
6-Month 		68.0°F
(20.0°C)		 65.5°F
(18.6°C)		 2.5°F
(1.4°C)		 120th Coolest
Coolest since:
 1904
9th Warmest
Warmest since:
 2012
Feb–Aug 1987
7-Month 		63.8°F
(17.7°C)		 61.1°F
(16.2°C)		 2.7°F
(1.5°C)		 121st Coolest
Coolest since:
 1904
8th Warmest
Warmest since:
 2012
Jan–Aug 1987
8-Month 		59.7°F
(15.4°C)		 57.4°F
(14.1°C)		 2.3°F
(1.3°C)		 118th Coolest
Coolest since:
 1912
11th Warmest
Warmest since:
 2012
Ties: 1932
Dec 1986–Aug 1987
9-Month 		56.9°F
(13.8°C)		 54.8°F
(12.7°C)		 2.1°F
(1.1°C)		 112th Coolest
Coolest since:
 1904
16th Warmest
Warmest since:
 2012
Nov 1986–Aug 1987
10-Month 		55.4°F
(13.0°C)		 53.8°F
(12.1°C)		 1.6°F
(0.9°C)		 107th Coolest
Coolest since:
 1904
21st Warmest
Warmest since:
 2012
Ties: 1938
Oct 1986–Aug 1987
11-Month 		55.7°F
(13.2°C)		 54.2°F
(12.3°C)		 1.5°F
(0.9°C)		 109th Coolest
Coolest since:
 1904
19th Warmest
Warmest since:
 2012
Ties: 1925
Sep 1986–Aug 1987
12-Month 		57.0°F
(13.9°C)		 55.4°F
(13.0°C)		 1.6°F
(0.9°C)		 113th Coolest
Coolest since:
 1904
15th Warmest
Warmest since:
 2012
Ties: 1998
Mar 1986–Aug 1987
18-Month 		60.4°F
(15.8°C)		 58.7°F
(14.8°C)		 1.7°F
(1.0°C)		 115th Coolest
Coolest since:
 1904
13th Warmest
Warmest since:
 2012
Ties: 1939, 1955, 2000, 2002, 2007
Sep 1985–Aug 1987
24-Month 		56.7°F
(13.7°C)		 55.4°F
(13.0°C)		 1.3°F
(0.7°C)		 109th Coolest
Coolest since:
 1979
18th Warmest
Warmest since:
 2017
Ties: 1934, 2022
Sep 1984–Aug 1987
36-Month 		56.2°F
(13.4°C)		 55.3°F
(12.9°C)		 0.9°F
(0.5°C)		 98th Coolest
Coolest since:
 1979
28th Warmest
Warmest since:
 2018
Ties: 1922, 1936, 1939, 1957, 1993
Sep 1983–Aug 1987
48-Month 		55.7°F
(13.2°C)		 55.4°F
(13.0°C)		 0.3°F
(0.2°C)		 74th Coolest
Coolest since:
 1980
51st Warmest
Warmest since:
 2019
Ties: 1925, 1940, 1949, 1994, 2016
Sep 1982–Aug 1987
60-Month 		55.8°F
(13.2°C)		 55.4°F
(13.0°C)		 0.4°F
(0.2°C)		 75th Coolest
Coolest since:
 1906
49th Warmest
Warmest since:
 2020
Ties: 1976, 1993

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