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 1940

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
August 1940
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: 1968, 1984, 2019, 2022
Jul–Aug 1940
2-Month		76.8°F
(24.9°C)		77.0°F
(25.0°C)		-0.2°F
(-0.1°C)		59th Coolest
Coolest since:
1967
70th Warmest
Warmest since:
1936
Ties: 1907, 1964
Jun–Aug 1940
3-Month		75.8°F
(24.3°C)		75.9°F
(24.4°C)		-0.1°F
(-0.1°C)		56th Coolest
Coolest since:
1915, 1927
73rd Warmest
Warmest since:
1936
Ties: 1897, 1898, 1939, 2008, 2017
May–Aug 1940
4-Month		72.4°F
(22.4°C)		73.2°F
(22.9°C)		-0.8°F
(-0.5°C)		37th Coolest
Coolest since:
1967
92nd Warmest
Warmest since:
1936
Ties: 1958, 1968
Apr–Aug 1940
5-Month		68.7°F
(20.4°C)		69.6°F
(20.9°C)		-0.9°F
(-0.5°C)		27th Coolest
Coolest since:
1907
102nd Warmest
Warmest since:
2010
Ties: 1903
Mar–Aug 1940
6-Month		64.4°F
(18.0°C)		65.5°F
(18.6°C)		-1.1°F
(-0.6°C)		24th Coolest
Coolest since:
1904
105th Warmest
Warmest since:
2012
Feb–Aug 1940
7-Month		59.9°F
(15.5°C)		61.1°F
(16.2°C)		-1.2°F
(-0.7°C)		25th Coolest
Coolest since:
1904
104th Warmest
Warmest since:
2012
Ties: 1929, 1961
Jan–Aug 1940
8-Month		54.5°F
(12.5°C)		57.3°F
(14.1°C)		-2.8°F
(-1.6°C)		5th Coolest
Coolest since:
1912
124th Warmest
Warmest since:
2012
Dec 1939–Aug 1940
9-Month		52.6°F
(11.4°C)		54.8°F
(12.7°C)		-2.2°F
(-1.3°C)		7th Coolest
Coolest since:
1904
121st Warmest
Warmest since:
2012
Ties: 1899, 1915
Nov 1939–Aug 1940
10-Month		51.6°F
(10.9°C)		53.8°F
(12.1°C)		-2.2°F
(-1.2°C)		6th Coolest
Coolest since:
1904
122nd Warmest
Warmest since:
2012
Ties: 1920
Oct 1939–Aug 1940
11-Month		52.4°F
(11.3°C)		54.1°F
(12.3°C)		-1.7°F
(-1.0°C)		7th Coolest
Coolest since:
1904
121st Warmest
Warmest since:
2012
Ties: 1920, 1958, 1960, 2014
Sep 1939–Aug 1940
12-Month		54.2°F
(12.3°C)		55.4°F
(13.0°C)		-1.2°F
(-0.7°C)		22nd Coolest
Coolest since:
1904
106th Warmest
Warmest since:
2012
Ties: 1963, 1996, 1997
Mar 1939–Aug 1940
18-Month		58.1°F
(14.5°C)		58.7°F
(14.8°C)		-0.6°F
(-0.3°C)		30th Coolest
Coolest since:
1904
98th Warmest
Warmest since:
2012
Ties: 1960, 1967, 1985, 1993
Sep 1938–Aug 1940
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, 1941, 1946, 1950, 1993, 1995, 2004
Sep 1937–Aug 1940
36-Month		55.8°F
(13.2°C)		55.4°F
(13.0°C)		0.4°F
(0.2°C)		80th Coolest
Coolest since:
1979
46th Warmest
Warmest since:
2018
Ties: 1942, 2003
Sep 1936–Aug 1940
48-Month		55.7°F
(13.2°C)		55.3°F
(12.9°C)		0.4°F
(0.3°C)		74th Coolest
Coolest since:
1980
51st Warmest
Warmest since:
2019
Ties: 1925, 1949, 1987, 1994, 2016
Sep 1935–Aug 1940
60-Month		55.6°F
(13.1°C)		55.3°F
(12.9°C)		0.3°F
(0.2°C)		67th Coolest
Coolest since:
1906
57th Warmest
Warmest since:
2020
Ties: 1922, 1949, 1950, 1959, 1975

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