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 1939

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
August 1939
1-Month
74.8°F
(23.8°C)
76.0°F
(24.4°C)
-1.2°F
(-0.6°C)
34th Coolest
Coolest since:
1915
95th Warmest
Warmest since:
1936
Ties: 1902, 1911, 1963, 1965, 1999
Jul–Aug 1939
2-Month
76.5°F
(24.7°C)
77.0°F
(25.0°C)
-0.5°F
(-0.3°C)
53rd Coolest
Coolest since:
1967
76th Warmest
Warmest since:
1936
Ties: 1968
Jun–Aug 1939
3-Month
75.8°F
(24.3°C)
75.9°F
(24.4°C)
-0.1°F
(-0.1°C)
56th Coolest
Coolest since:
1915, 1927
73rd Warmest
Warmest since:
1936
Ties: 1897, 1898, 1940, 2008, 2017
May–Aug 1939
4-Month
73.6°F
(23.1°C)
73.2°F
(22.9°C)
0.4°F
(0.2°C)
71st Coolest
Coolest since:
1967
58th Warmest
Warmest since:
1936
Ties: 1931, 1957, 1965, 2021
Apr–Aug 1939
5-Month
69.4°F
(20.8°C)
69.7°F
(20.9°C)
-0.3°F
(-0.1°C)
51st Coolest
Coolest since:
1907
78th Warmest
Warmest since:
2010
Mar–Aug 1939
6-Month
65.7°F
(18.7°C)
65.4°F
(18.6°C)
0.3°F
(0.1°C)
68th Coolest
Coolest since:
1904
61st Warmest
Warmest since:
2012
Ties: 1902, 1948
Feb–Aug 1939
7-Month
61.2°F
(16.2°C)
61.1°F
(16.2°C)
0.1°F
(0.0°C)
61st Coolest
Coolest since:
1904
68th Warmest
Warmest since:
2012
Ties: 1909, 1948
Jan–Aug 1939
8-Month
58.3°F
(14.6°C)
57.3°F
(14.1°C)
1.0°F
(0.5°C)
94th Coolest
Coolest since:
1912
35th Warmest
Warmest since:
2012
Ties: 1919, 1941, 2001, 2018
Dec 1938–Aug 1939
9-Month
55.8°F
(13.2°C)
54.8°F
(12.7°C)
1.0°F
(0.5°C)
90th Coolest
Coolest since:
1904
38th Warmest
Warmest since:
2012
Ties: 1946, 1949
Nov 1938–Aug 1939
10-Month
54.8°F
(12.7°C)
53.8°F
(12.1°C)
1.0°F
(0.6°C)
94th Coolest
Coolest since:
1904
34th Warmest
Warmest since:
2012
Ties: 1946, 1949, 1952, 1988, 2018
Oct 1938–Aug 1939
11-Month
55.5°F
(13.1°C)
54.2°F
(12.3°C)
1.3°F
(0.8°C)
105th Coolest
Coolest since:
1904
23rd Warmest
Warmest since:
2012
Ties: 1914
Sep 1938–Aug 1939
12-Month
56.8°F
(13.8°C)
55.4°F
(13.0°C)
1.4°F
(0.8°C)
109th Coolest
Coolest since:
1904
19th Warmest
Warmest since:
2012
Ties: 1953, 1955
Mar 1938–Aug 1939
18-Month
60.4°F
(15.8°C)
58.7°F
(14.8°C)
1.7°F
(1.0°C)
115th Coolest
Coolest since:
1904
13th Warmest
Warmest since:
2012
Ties: 1955, 1987, 2000, 2002, 2007
Sep 1937–Aug 1939
24-Month
56.6°F
(13.7°C)
55.4°F
(13.0°C)
1.2°F
(0.7°C)
106th Coolest
Coolest since:
1979
21st Warmest
Warmest since:
2017
Ties: 1942, 2020
Sep 1936–Aug 1939
36-Month
56.2°F
(13.4°C)
55.3°F
(12.9°C)
0.9°F
(0.5°C)
98th Coolest
Coolest since:
1979
28th Warmest
Warmest since:
2018
Ties: 1922, 1936, 1957, 1987, 1993
Sep 1935–Aug 1939
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: 1941, 1989, 1991, 1992, 1993, 2015
Sep 1934–Aug 1939
60-Month
56.0°F
(13.3°C)
55.4°F
(13.0°C)
0.6°F
(0.3°C)
87th Coolest
Coolest since:
1906
37th Warmest
Warmest since:
2020
Ties: 1937, 1943, 1958, 1992

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