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, July 2021

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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
July 2021
1-Month 		74.6°F
(23.7°C)		 75.6°F
(24.2°C)		 -1.0°F
(-0.5°C)		 45th Coolest
Coolest since:
 2009, 2014
84th Warmest
Warmest since:
 1936
Ties: 1900, 1917
Jun–Jul 2021
2-Month 		74.4°F
(23.6°C)		 73.5°F
(23.1°C)		 0.9°F
(0.5°C)		 92nd Coolest
Coolest since:
 1915
37th Warmest
Warmest since:
 1934
Ties: 1923, 1941, 1964, 1995, 2017
May–Jul 2021
3-Month 		69.9°F
(21.1°C)		 69.7°F
(20.9°C)		 0.2°F
(0.2°C)		 69th Coolest
Coolest since:
 1924
60th Warmest
Warmest since:
 1934
Ties: 1898, 1982
Apr–Jul 2021
4-Month 		65.6°F
(18.7°C)		 65.2°F
(18.4°C)		 0.4°F
(0.3°C)		 73rd Coolest
Coolest since:
 1907
56th Warmest
Warmest since:
 1934
Ties: 1948, 1980, 2004
Mar–Jul 2021
5-Month 		61.7°F
(16.5°C)		 60.1°F
(15.6°C)		 1.6°F
(0.9°C)		 111th Coolest
Coolest since:
 1960
18th Warmest
Warmest since:
 2012
Ties: 1911, 1933, 1938, 1988
Feb–Jul 2021
6-Month 		54.9°F
(12.7°C)		 55.0°F
(12.8°C)		 -0.1°F
(-0.1°C)		 60th Coolest
Coolest since:
 1947
69th Warmest
Warmest since:
 2012
Ties: 1908, 1943, 1994
Jan–Jul 2021
7-Month 		51.2°F
(10.7°C)		 50.7°F
(10.4°C)		 0.5°F
(0.3°C)		 76th Coolest
Coolest since:
 1912
53rd Warmest
Warmest since:
 2012
Dec 2020–Jul 2021
8-Month 		49.0°F
(9.4°C)		 48.1°F
(8.9°C)		 0.9°F
(0.5°C)		 85th Coolest
Coolest since:
 1904
43rd Warmest
Warmest since:
 2012
Ties: 1957
Nov 2020–Jul 2021
9-Month 		48.7°F
(9.3°C)		 47.2°F
(8.4°C)		 1.5°F
(0.9°C)		 98th Coolest
Coolest since:
 1904
30th Warmest
Warmest since:
 2012
Ties: 1939, 2022
Oct 2020–Jul 2021
10-Month 		49.1°F
(9.5°C)		 48.0°F
(8.9°C)		 1.1°F
(0.6°C)		 93rd Coolest
Coolest since:
 1904
35th Warmest
Warmest since:
 2012
Ties: 1925, 1931
Sep 2020–Jul 2021
11-Month 		50.6°F
(10.3°C)		 49.7°F
(9.8°C)		 0.9°F
(0.5°C)		 89th Coolest
Coolest since:
 1904
39th Warmest
Warmest since:
 2012
Ties: 1898, 1972
Aug 2020–Jul 2021
12-Month 		52.4°F
(11.3°C)		 51.6°F
(10.9°C)		 0.8°F
(0.4°C)		 85th Coolest
Coolest since:
 1904
43rd Warmest
Warmest since:
 2012
Ties: 1898, 1933, 1946, 1948, 1972, 1981
Feb 2020–Jul 2021
18-Month 		53.7°F
(12.1°C)		 52.7°F
(11.5°C)		 1.0°F
(0.6°C)		 96th Coolest
Coolest since:
 1918
32nd Warmest
Warmest since:
 2012
Aug 2019–Jul 2021
24-Month 		52.8°F
(11.6°C)		 51.6°F
(10.9°C)		 1.2°F
(0.7°C)		 103rd Coolest
Coolest since:
 1905
24th Warmest
Warmest since:
 2017
Ties: 2002
Aug 2018–Jul 2021
36-Month 		52.6°F
(11.4°C)		 51.6°F
(10.9°C)		 1.0°F
(0.5°C)		 101st Coolest
Coolest since:
 1979
25th Warmest
Warmest since:
 2018
Ties: 1935, 1939, 1987, 1989, 1991, 2020
Aug 2017–Jul 2021
48-Month 		52.5°F
(11.4°C)		 51.5°F
(10.8°C)		 1.0°F
(0.6°C)		 98th Coolest
Coolest since:
 1905, 1980
27th Warmest
Warmest since:
 2019
Ties: 1924, 1988, 1989, 1991, 2004, 2014
Aug 2016–Jul 2021
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: 1935, 2006, 2008, 2019

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