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 1899

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
August 1899
1-Month		78.5°F
(25.8°C)		76.0°F
(24.4°C)		2.5°F
(1.4°C)		110th Coolest
Coolest since:
1915
19th Warmest
Warmest to Date
1936
Jul–Aug 1899
2-Month		77.3°F
(25.2°C)		77.0°F
(25.0°C)		0.3°F
(0.2°C)		77th Coolest
Coolest since:
1967
52nd Warmest
Warmest to Date
1936
Ties: 2021
Jun–Aug 1899
3-Month		76.5°F
(24.7°C)		75.9°F
(24.4°C)		0.6°F
(0.3°C)		83rd Coolest
Coolest since:
1915, 1927
46th Warmest
Warmest to Date
1936
Ties: 1947, 1977, 1986, 1999
May–Aug 1899
4-Month		74.0°F
(23.3°C)		73.2°F
(22.9°C)		0.8°F
(0.4°C)		85th Coolest
Coolest since:
1967
44th Warmest
Warmest since:
1936
Ties: 1900, 1902
Apr–Aug 1899
5-Month		70.2°F
(21.2°C)		69.6°F
(20.9°C)		0.6°F
(0.3°C)		79th Coolest
Coolest since:
1907
50th Warmest
Warmest since:
2010
Ties: 1900, 1937
Mar–Aug 1899
6-Month		65.0°F
(18.3°C)		65.5°F
(18.6°C)		-0.5°F
(-0.3°C)		40th Coolest
Coolest since:
1904
89th Warmest
Warmest since:
2012
Ties: 1909, 1970, 1976, 1993
Feb–Aug 1899
7-Month		58.8°F
(14.9°C)		61.1°F
(16.2°C)		-2.3°F
(-1.3°C)		8th Coolest
Coolest to Date
1904
121st Warmest
Warmest since:
2012
Ties: 1924
Jan–Aug 1899
8-Month		55.3°F
(12.9°C)		57.3°F
(14.1°C)		-2.0°F
(-1.2°C)		10th Coolest
Coolest since:
1912
119th Warmest
Warmest since:
2012
Ties: 1920
Dec 1898–Aug 1899
9-Month		52.6°F
(11.4°C)		54.8°F
(12.7°C)		-2.2°F
(-1.3°C)		7th Coolest
Coolest to Date
1904
121st Warmest
Warmest since:
2012
Ties: 1915, 1940
Nov 1898–Aug 1899
10-Month		51.4°F
(10.8°C)		53.8°F
(12.1°C)		-2.4°F
(-1.3°C)		5th Coolest
Coolest to Date
1904
123rd Warmest
Warmest since:
2012
Oct 1898–Aug 1899
11-Month		51.6°F
(10.9°C)		54.1°F
(12.3°C)		-2.5°F
(-1.4°C)		5th Coolest
Coolest to Date
1904
123rd Warmest
Warmest since:
2012
Sep 1898–Aug 1899
12-Month		53.3°F
(11.8°C)		55.4°F
(13.0°C)		-2.1°F
(-1.2°C)		5th Coolest
Coolest to Date
1904
123rd Warmest
Warmest since:
2012
Mar 1898–Aug 1899
18-Month		57.3°F
(14.1°C)		58.7°F
(14.8°C)		-1.4°F
(-0.7°C)		8th Coolest
Coolest to Date
1904
120th Warmest
Warmest since:
2012
Ties: 2014
Sep 1897–Aug 1899
24-Month		54.8°F
(12.7°C)		55.4°F
(13.0°C)		-0.6°F
(-0.3°C)		28th Coolest
Coolest to Date
1979
99th Warmest
Warmest since:
2017
Ties: 1907, 1919, 1962, 1977
Sep 1896–Aug 1899
36-Month		54.8°F
(12.7°C)		55.4°F
(13.0°C)		-0.6°F
(-0.3°C)		24th Coolest
Coolest to Date
1979
102nd Warmest
Warmest since:
2018
Ties: 1929, 1977, 1982
Sep 1895–Aug 1899
48-Month		55.0°F
(12.8°C)		55.3°F
(12.9°C)		-0.3°F
(-0.1°C)		33rd Coolest
Coolest to Date
1980
92nd Warmest
Warmest to Date
2019
Ties: 1964, 1996

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