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 1941

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
August 1941
1-Month 		79.0°F
(26.1°C)		 76.0°F
(24.4°C)		 3.0°F
(1.7°C)		 112th Coolest
Coolest since:
 1915
17th Warmest
Warmest since:
 1936
Ties: 1909
Jul–Aug 1941
2-Month 		79.4°F
(26.3°C)		 77.0°F
(25.0°C)		 2.4°F
(1.3°C)		 115th Coolest
Coolest since:
 1967
14th Warmest
Warmest since:
 1936
Ties: 1916
Jun–Aug 1941
3-Month 		78.0°F
(25.6°C)		 75.9°F
(24.4°C)		 2.1°F
(1.2°C)		 112th Coolest
Coolest since:
 1915, 1927
17th Warmest
Warmest since:
 1936
May–Aug 1941
4-Month 		75.6°F
(24.2°C)		 73.2°F
(22.9°C)		 2.4°F
(1.3°C)		 119th Coolest
Coolest since:
 1967
10th Warmest
Warmest since:
 1936
Ties: 1980, 1991, 2011
Apr–Aug 1941
5-Month 		72.3°F
(22.4°C)		 69.6°F
(20.9°C)		 2.7°F
(1.5°C)		 123rd Coolest
Coolest since:
 1907
6th Warmest
Warmest since:
 2010
Ties: 1991, 2011
Mar–Aug 1941
6-Month 		66.8°F
(19.3°C)		 65.5°F
(18.6°C)		 1.3°F
(0.7°C)		 104th Coolest
Coolest since:
 1904
25th Warmest
Warmest since:
 2012
Ties: 2021
Feb–Aug 1941
7-Month 		61.8°F
(16.6°C)		 61.1°F
(16.2°C)		 0.7°F
(0.4°C)		 86th Coolest
Coolest since:
 1904
43rd Warmest
Warmest since:
 2012
Ties: 1933, 1943
Jan–Aug 1941
8-Month 		58.3°F
(14.6°C)		 57.3°F
(14.1°C)		 1.0°F
(0.5°C)		 94th Coolest
Coolest since:
 1912
35th Warmest
Warmest since:
 2012
Ties: 1919, 1939, 2001, 2018
Dec 1940–Aug 1941
9-Month 		56.2°F
(13.4°C)		 54.8°F
(12.7°C)		 1.4°F
(0.7°C)		 103rd Coolest
Coolest since:
 1904
25th Warmest
Warmest since:
 2012
Ties: 1914, 2010
Nov 1940–Aug 1941
10-Month 		54.9°F
(12.7°C)		 53.8°F
(12.1°C)		 1.1°F
(0.6°C)		 99th Coolest
Coolest since:
 1904
29th Warmest
Warmest since:
 2012
Ties: 1986, 2004, 2011, 2021
Oct 1940–Aug 1941
11-Month 		55.6°F
(13.1°C)		 54.1°F
(12.3°C)		 1.5°F
(0.8°C)		 107th Coolest
Coolest since:
 1904
21st Warmest
Warmest since:
 2012
Ties: 1919
Sep 1940–Aug 1941
12-Month 		56.7°F
(13.7°C)		 55.4°F
(13.0°C)		 1.3°F
(0.7°C)		 106th Coolest
Coolest since:
 1904
22nd Warmest
Warmest since:
 2012
Ties: 1914, 1995
Mar 1940–Aug 1941
18-Month 		59.3°F
(15.2°C)		 58.7°F
(14.8°C)		 0.6°F
(0.4°C)		 83rd Coolest
Coolest since:
 1904
45th Warmest
Warmest since:
 2012
Ties: 1901, 1943, 1956, 1998
Sep 1939–Aug 1941
24-Month 		55.5°F
(13.1°C)		 55.4°F
(13.0°C)		 0.1°F
(0.1°C)		 70th Coolest
Coolest since:
 1979
57th Warmest
Warmest since:
 2017
Ties: 1898, 1926, 1940, 1946, 1950, 1993, 1995, 2004
Sep 1938–Aug 1941
36-Month 		55.9°F
(13.3°C)		 55.4°F
(13.0°C)		 0.5°F
(0.3°C)		 85th Coolest
Coolest since:
 1979
41st Warmest
Warmest since:
 2018
Ties: 1944, 1989, 2010, 2016
Sep 1937–Aug 1941
48-Month 		56.0°F
(13.3°C)		 55.3°F
(12.9°C)		 0.7°F
(0.4°C)		 88th Coolest
Coolest since:
 1980
37th Warmest
Warmest since:
 2019
Ties: 1939, 1989, 1991, 1992, 1993, 2015
Sep 1936–Aug 1941
60-Month 		55.9°F
(13.3°C)		 55.3°F
(12.9°C)		 0.6°F
(0.4°C)		 82nd Coolest
Coolest since:
 1906
42nd Warmest
Warmest since:
 2020
Ties: 1945, 1954, 1989, 1990, 1995, 1999

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