Statewide Rankings

Statewide 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

Average Temperature Rankings, August 2019

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
August 2019
1-Month 		72.8°F
(22.7°C)		 73.4°F
(23.0°C)		 -0.6°F
(-0.3°C)		 46th Coolest
Coolest since:
 1915
83rd Warmest
Warmest since:
 1947
Ties: 1961, 1989, 2013, 2020
Jul–Aug 2019
2-Month 		75.1°F
(23.9°C)		 74.5°F
(23.6°C)		 0.6°F
(0.3°C)		 86th Coolest
Coolest since:
 1915
43rd Warmest
Warmest since:
 1936
Ties: 1998, 1999, 2021
Jun–Aug 2019
3-Month 		73.7°F
(23.2°C)		 73.5°F
(23.1°C)		 0.2°F
(0.1°C)		 72nd Coolest
Coolest since:
 1915
57th Warmest
Warmest since:
 1936
Ties: 1898, 1956, 1964
May–Aug 2019
4-Month 		70.9°F
(21.6°C)		 70.6°F
(21.4°C)		 0.3°F
(0.2°C)		 70th Coolest
Coolest since:
 1915
59th Warmest
Warmest since:
 1934, 1936
Ties: 1919, 1965, 1970
Apr–Aug 2019
5-Month 		67.2°F
(19.6°C)		 66.8°F
(19.3°C)		 0.4°F
(0.3°C)		 72nd Coolest
Coolest since:
 1907
57th Warmest
Warmest since:
 1934
Ties: 1906, 1919, 1948, 1983
Mar–Aug 2019
6-Month 		62.2°F
(16.8°C)		 62.3°F
(16.8°C)		 -0.1°F
(0.0°C)		 50th Coolest
Coolest since:
 1904, 1950, 1960
79th Warmest
Warmest since:
 2012
Ties: 1931, 1943, 1945, 1962, 1994
Feb–Aug 2019
7-Month 		57.5°F
(14.2°C)		 57.5°F
(14.2°C)		 0.0°F
(0.0°C)		 58th Coolest
Coolest since:
 1904
71st Warmest
Warmest since:
 2012
Ties: 1908, 1914, 1992
Jan–Aug 2019
8-Month 		53.5°F
(11.9°C)		 53.5°F
(11.9°C)		 0.0°F
(0.0°C)		 63rd Coolest
Coolest since:
 1904, 1912
66th Warmest
Warmest since:
 2012
Ties: 1909, 1975
Dec 2018–Aug 2019
9-Month 		51.4°F
(10.8°C)		 50.9°F
(10.5°C)		 0.5°F
(0.3°C)		 77th Coolest
Coolest since:
 1904
51st Warmest
Warmest since:
 2012
Ties: 1908, 1990
Nov 2018–Aug 2019
10-Month 		49.8°F
(9.9°C)		 49.9°F
(9.9°C)		 -0.1°F
(0.0°C)		 56th Coolest
Coolest since:
 1904
72nd Warmest
Warmest since:
 2012
Ties: 1900, 1903
Oct 2018–Aug 2019
11-Month 		50.2°F
(10.1°C)		 50.3°F
(10.2°C)		 -0.1°F
(-0.1°C)		 50th Coolest
Coolest since:
 1904
78th Warmest
Warmest since:
 2012
Ties: 1908, 1950
Sep 2018–Aug 2019
12-Month 		51.9°F
(11.1°C)		 51.7°F
(10.9°C)		 0.2°F
(0.2°C)		 71st Coolest
Coolest since:
 1904
57th Warmest
Warmest since:
 2012
Ties: 1923, 1928, 1952, 1990
Mar 2018–Aug 2019
18-Month 		55.7°F
(13.2°C)		 55.2°F
(12.9°C)		 0.5°F
(0.3°C)		 82nd Coolest
Coolest since:
 1904
46th Warmest
Warmest since:
 2012
Ties: 1911, 1989, 2004
Sep 2017–Aug 2019
24-Month 		52.4°F
(11.3°C)		 51.7°F
(10.9°C)		 0.7°F
(0.4°C)		 94th Coolest
Coolest since:
 1905
33rd Warmest
Warmest since:
 2017
Ties: 1921, 1923, 1943, 1949, 1953, 1956
Sep 2016–Aug 2019
36-Month 		53.3°F
(11.8°C)		 51.6°F
(10.9°C)		 1.7°F
(0.9°C)		 115th Coolest
Coolest since:
 1979
11th Warmest
Warmest since:
 2018
Sep 2015–Aug 2019
48-Month 		53.8°F
(12.1°C)		 51.6°F
(10.9°C)		 2.2°F
(1.2°C)		 124th Coolest
Coolest since:
 1905
1st Warmest
Warmest to Date
 2019
Sep 2014–Aug 2019
60-Month 		53.2°F
(11.8°C)		 51.6°F
(10.9°C)		 1.6°F
(0.9°C)		 121st Coolest
Coolest since:
 1906
3rd Warmest
Warmest since:
 2020
Ties: 2006, 2021

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