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, June 2021

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
June 2021
1-Month 		76.0°F
(24.4°C)		 73.9°F
(23.3°C)		 2.1°F
(1.1°C)		 99th Coolest
Coolest since:
 1903
30th Warmest
Warmest since:
 1952
Ties: 2022
May–Jun 2021
2-Month 		69.8°F
(21.0°C)		 69.4°F
(20.8°C)		 0.4°F
(0.2°C)		 70th Coolest
Coolest since:
 1907
59th Warmest
Warmest since:
 2018
Ties: 1908
Apr–Jun 2021
3-Month 		65.0°F
(18.3°C)		 64.7°F
(18.2°C)		 0.3°F
(0.1°C)		 58th Coolest
Coolest since:
 1907
71st Warmest
Warmest since:
 2010
Ties: 1908, 1918, 1967, 1978
Mar–Jun 2021
4-Month 		61.5°F
(16.4°C)		 59.7°F
(15.4°C)		 1.8°F
(1.0°C)		 106th Coolest
Coolest since:
 1960
23rd Warmest
Warmest since:
 2012
Ties: 1918, 2022
Feb–Jun 2021
5-Month 		54.5°F
(12.5°C)		 54.7°F
(12.6°C)		 -0.2°F
(-0.1°C)		 55th Coolest
Coolest since:
 1912, 1960, 1978
74th Warmest
Warmest since:
 2012
Ties: 1935
Jan–Jun 2021
6-Month 		51.2°F
(10.7°C)		 50.8°F
(10.4°C)		 0.4°F
(0.3°C)		 71st Coolest
Coolest since:
 1912, 1978
58th Warmest
Warmest since:
 2012
Ties: 1942, 1943, 1950, 1956, 1995
Dec 2020–Jun 2021
7-Month 		49.1°F
(9.5°C)		 48.4°F
(9.1°C)		 0.7°F
(0.4°C)		 73rd Coolest
Coolest since:
 1978
55th Warmest
Warmest since:
 2012
Nov 2020–Jun 2021
8-Month 		49.3°F
(9.6°C)		 48.0°F
(8.9°C)		 1.3°F
(0.7°C)		 94th Coolest
Coolest since:
 1912
34th Warmest
Warmest since:
 2012
Ties: 1949
Oct 2020–Jun 2021
9-Month 		50.0°F
(10.0°C)		 49.1°F
(9.5°C)		 0.9°F
(0.5°C)		 88th Coolest
Coolest since:
 1912, 1978
40th Warmest
Warmest since:
 2012
Ties: 1898, 1911, 1938, 1955, 2010
Sep 2020–Jun 2021
10-Month 		51.8°F
(11.0°C)		 51.0°F
(10.6°C)		 0.8°F
(0.4°C)		 85th Coolest
Coolest since:
 1978
43rd Warmest
Warmest since:
 2012
Ties: 1909, 1919, 1938, 1949
Aug 2020–Jun 2021
11-Month 		53.9°F
(12.2°C)		 53.3°F
(11.8°C)		 0.6°F
(0.4°C)		 77th Coolest
Coolest since:
 1904, 1978
51st Warmest
Warmest since:
 2012
Ties: 1923, 1931, 1933, 1935, 1952, 2010
Jul 2020–Jun 2021
12-Month 		56.1°F
(13.4°C)		 55.4°F
(13.0°C)		 0.7°F
(0.4°C)		 83rd Coolest
Coolest since:
 1904, 1912, 1918, 1978
45th Warmest
Warmest since:
 2012
Ties: 1933, 1976
Jan 2020–Jun 2021
18-Month 		54.9°F
(12.7°C)		 53.8°F
(12.1°C)		 1.1°F
(0.6°C)		 100th Coolest
Coolest since:
 1979
28th Warmest
Warmest since:
 2017
Ties: 1935, 1974, 1988
Jul 2019–Jun 2021
24-Month 		56.5°F
(13.6°C)		 55.4°F
(13.0°C)		 1.1°F
(0.6°C)		 105th Coolest
Coolest since:
 1978, 1979
22nd Warmest
Warmest since:
 2017
Ties: 1934, 1987, 2016
Jul 2018–Jun 2021
36-Month 		56.4°F
(13.6°C)		 55.3°F
(12.9°C)		 1.1°F
(0.7°C)		 101st Coolest
Coolest since:
 1979
25th Warmest
Warmest since:
 2018
Ties: 1957, 2004
Jul 2017–Jun 2021
48-Month 		56.4°F
(13.6°C)		 55.3°F
(12.9°C)		 1.1°F
(0.7°C)		 103rd Coolest
Coolest since:
 1980
22nd Warmest
Warmest since:
 2019
Ties: 2005
Jul 2016–Jun 2021
60-Month 		57.0°F
(13.9°C)		 55.4°F
(13.0°C)		 1.6°F
(0.9°C)		 122nd Coolest
Coolest since:
 1980
2nd Warmest
Warmest since:
 2020
Ties: 1935, 2019

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