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 1999

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
June 1999
1-Month
74.4°F
(23.6°C)
73.9°F
(23.3°C)
0.5°F
(0.3°C)
70th Coolest
Coolest since:
1903
59th Warmest
Warmest since:
1952
Ties: 1939, 1957, 1973, 1977
May–Jun 1999
2-Month
70.0°F
(21.1°C)
69.4°F
(20.8°C)
0.6°F
(0.3°C)
76th Coolest
Coolest since:
1907
53rd Warmest
Warmest since:
2018
Ties: 1937, 1957
Apr–Jun 1999
3-Month
66.3°F
(19.1°C)
64.8°F
(18.2°C)
1.5°F
(0.9°C)
96th Coolest
Coolest since:
1907
33rd Warmest
Warmest since:
2010
Ties: 2014
Mar–Jun 1999
4-Month
60.2°F
(15.7°C)
59.8°F
(15.4°C)
0.4°F
(0.3°C)
72nd Coolest
Coolest since:
1960
57th Warmest
Warmest since:
2012
Ties: 1910, 1929, 1945, 1957, 1974
Feb–Jun 1999
5-Month
56.6°F
(13.7°C)
54.7°F
(12.6°C)
1.9°F
(1.1°C)
104th Coolest
Coolest since:
1912, 1960, 1978
25th Warmest
Warmest since:
2012
Ties: 1922
Jan–Jun 1999
6-Month
52.6°F
(11.4°C)
50.7°F
(10.4°C)
1.9°F
(1.0°C)
105th Coolest
Coolest since:
1912, 1978
24th Warmest
Warmest since:
2012
Ties: 1992
Dec 1998–Jun 1999
7-Month
50.5°F
(10.3°C)
48.4°F
(9.1°C)
2.1°F
(1.2°C)
107th Coolest
Coolest since:
1978
21st Warmest
Warmest since:
2012
Nov 1998–Jun 1999
8-Month
50.3°F
(10.2°C)
48.0°F
(8.9°C)
2.3°F
(1.3°C)
114th Coolest
Coolest since:
1912
14th Warmest
Warmest since:
2012
Oct 1998–Jun 1999
9-Month
51.4°F
(10.8°C)
49.1°F
(9.5°C)
2.3°F
(1.3°C)
118th Coolest
Coolest since:
1912, 1978
10th Warmest
Warmest since:
2012
Ties: 2002
Sep 1998–Jun 1999
10-Month
53.6°F
(12.0°C)
51.0°F
(10.6°C)
2.6°F
(1.4°C)
120th Coolest
Coolest since:
1978
8th Warmest
Warmest since:
2012
Ties: 1991
Aug 1998–Jun 1999
11-Month
55.7°F
(13.2°C)
53.3°F
(11.8°C)
2.4°F
(1.4°C)
122nd Coolest
Coolest since:
1904, 1978
6th Warmest
Warmest since:
2012
Ties: 1921, 2000
Jul 1998–Jun 1999
12-Month
57.6°F
(14.2°C)
55.4°F
(13.0°C)
2.2°F
(1.2°C)
121st Coolest
Coolest since:
1904, 1912, 1918, 1978
7th Warmest
Warmest since:
2012
Jan 1998–Jun 1999
18-Month
56.5°F
(13.6°C)
53.9°F
(12.2°C)
2.6°F
(1.4°C)
124th Coolest
Coolest since:
1979
4th Warmest
Warmest since:
2017
Ties: 2013
Jul 1997–Jun 1999
24-Month
57.2°F
(14.0°C)
55.4°F
(13.0°C)
1.8°F
(1.0°C)
118th Coolest
Coolest since:
1978, 1979
9th Warmest
Warmest since:
2017
Ties: 1955, 2006
Jul 1996–Jun 1999
36-Month
56.2°F
(13.4°C)
55.4°F
(13.0°C)
0.8°F
(0.4°C)
97th Coolest
Coolest since:
1979
29th Warmest
Warmest since:
2018
Ties: 1922, 1943, 1988, 2005
Jul 1995–Jun 1999
48-Month
55.8°F
(13.2°C)
55.3°F
(12.9°C)
0.5°F
(0.3°C)
80th Coolest
Coolest since:
1980
45th Warmest
Warmest since:
2019
Ties: 1925, 1938, 1945, 1958, 1987, 1990, 2016
Jul 1994–Jun 1999
60-Month
55.8°F
(13.2°C)
55.3°F
(12.9°C)
0.5°F
(0.3°C)
77th Coolest
Coolest since:
1980
47th Warmest
Warmest since:
2020
Ties: 1924, 1976, 1988, 1993, 1995

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