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 2015

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
August 2015
1-Month
74.4°F
(23.6°C)
76.0°F
(24.4°C)
-1.6°F
(-0.8°C)
26th Coolest
Coolest since:
1915
103rd Warmest
Warmest since:
1936
Jul–Aug 2015
2-Month
76.4°F
(24.7°C)
76.9°F
(24.9°C)
-0.5°F
(-0.2°C)
45th Coolest
Coolest since:
1967
84th Warmest
Warmest since:
1936
Ties: 1902, 1908, 1942, 1948, 1960, 1962, 2017
Jun–Aug 2015
3-Month
76.1°F
(24.5°C)
75.9°F
(24.4°C)
0.2°F
(0.1°C)
69th Coolest
Coolest since:
1915, 1927
60th Warmest
Warmest since:
1936
Ties: 1956, 2001, 2019
May–Aug 2015
4-Month
73.9°F
(23.3°C)
73.2°F
(22.9°C)
0.7°F
(0.4°C)
82nd Coolest
Coolest since:
1967
47th Warmest
Warmest since:
1936
Ties: 1916, 1949, 1955, 2019
Apr–Aug 2015
5-Month
70.8°F
(21.6°C)
69.6°F
(20.9°C)
1.2°F
(0.7°C)
93rd Coolest
Coolest since:
1907
36th Warmest
Warmest since:
2010
Ties: 1925, 1943, 1944, 1999
Mar–Aug 2015
6-Month
66.3°F
(19.1°C)
65.5°F
(18.6°C)
0.8°F
(0.5°C)
87th Coolest
Coolest since:
1904
42nd Warmest
Warmest since:
2012
Ties: 1913
Feb–Aug 2015
7-Month
60.5°F
(15.8°C)
61.0°F
(16.1°C)
-0.5°F
(-0.3°C)
43rd Coolest
Coolest since:
1904
86th Warmest
Warmest since:
2012
Ties: 1897, 1916, 1965, 1997
Jan–Aug 2015
8-Month
56.9°F
(13.8°C)
57.3°F
(14.1°C)
-0.4°F
(-0.3°C)
43rd Coolest
Coolest since:
1912
86th Warmest
Warmest since:
2012
Ties: 1903, 1972, 1993, 2013
Dec 2014–Aug 2015
9-Month
54.9°F
(12.7°C)
54.9°F
(12.7°C)
0.0°F
(0.0°C)
62nd Coolest
Coolest since:
1904
66th Warmest
Warmest since:
2012
Ties: 1959
Nov 2014–Aug 2015
10-Month
53.2°F
(11.8°C)
53.8°F
(12.1°C)
-0.6°F
(-0.3°C)
40th Coolest
Coolest since:
1904
88th Warmest
Warmest since:
2012
Ties: 1907
Oct 2014–Aug 2015
11-Month
53.7°F
(12.1°C)
54.2°F
(12.3°C)
-0.5°F
(-0.2°C)
39th Coolest
Coolest since:
1904
89th Warmest
Warmest since:
2012
Ties: 1928, 1973, 1989
Sep 2014–Aug 2015
12-Month
54.8°F
(12.7°C)
55.4°F
(13.0°C)
-0.6°F
(-0.3°C)
35th Coolest
Coolest since:
1904
93rd Warmest
Warmest since:
2012
Ties: 1945, 1967, 1971, 1975, 1993
Mar 2014–Aug 2015
18-Month
58.2°F
(14.6°C)
58.8°F
(14.9°C)
-0.6°F
(-0.3°C)
35th Coolest
Coolest since:
1904
93rd Warmest
Warmest since:
2012
Ties: 1928, 1971, 1980
Sep 2013–Aug 2015
24-Month
54.4°F
(12.4°C)
55.4°F
(13.0°C)
-1.0°F
(-0.6°C)
13th Coolest
Coolest since:
1979
114th Warmest
Warmest since:
2017
Ties: 1900, 1951, 1968
Sep 2012–Aug 2015
36-Month
54.7°F
(12.6°C)
55.4°F
(13.0°C)
-0.7°F
(-0.4°C)
22nd Coolest
Coolest since:
1979
104th Warmest
Warmest since:
2018
Ties: 1968
Sep 2011–Aug 2015
48-Month
56.0°F
(13.3°C)
55.4°F
(13.0°C)
0.6°F
(0.3°C)
88th Coolest
Coolest since:
1980
37th Warmest
Warmest since:
2019
Ties: 1939, 1941, 1989, 1991, 1992, 1993
Sep 2010–Aug 2015
60-Month
56.1°F
(13.4°C)
55.4°F
(13.0°C)
0.7°F
(0.4°C)
93rd Coolest
Coolest since:
1906
31st Warmest
Warmest since:
2020
Ties: 1923, 1932, 1938, 1942, 2000

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