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 1959

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
August 1959
1-Month
78.4°F
(25.8°C)
76.0°F
(24.4°C)
2.4°F
(1.4°C)
109th Coolest
Coolest since:
1915
20th Warmest
Warmest since:
1936
Jul–Aug 1959
2-Month
77.5°F
(25.3°C)
77.0°F
(25.0°C)
0.5°F
(0.3°C)
83rd Coolest
Coolest since:
1967
46th Warmest
Warmest since:
1936
Jun–Aug 1959
3-Month
76.3°F
(24.6°C)
75.9°F
(24.4°C)
0.4°F
(0.2°C)
78th Coolest
Coolest since:
1915, 1927
51st Warmest
Warmest since:
1936
Ties: 1916, 1949, 1964, 1984
May–Aug 1959
4-Month
74.5°F
(23.6°C)
73.2°F
(22.9°C)
1.3°F
(0.7°C)
97th Coolest
Coolest since:
1967
32nd Warmest
Warmest since:
1936
Apr–Aug 1959
5-Month
70.9°F
(21.6°C)
69.6°F
(20.9°C)
1.3°F
(0.7°C)
95th Coolest
Coolest since:
1907
34th Warmest
Warmest since:
2010
Ties: 2022
Mar–Aug 1959
6-Month
66.6°F
(19.2°C)
65.4°F
(18.6°C)
1.2°F
(0.6°C)
99th Coolest
Coolest since:
1904
30th Warmest
Warmest since:
2012
Ties: 1964, 2018
Feb–Aug 1959
7-Month
62.2°F
(16.8°C)
61.1°F
(16.2°C)
1.1°F
(0.6°C)
94th Coolest
Coolest since:
1904
35th Warmest
Warmest since:
2012
Ties: 1896, 1957
Jan–Aug 1959
8-Month
58.0°F
(14.4°C)
57.4°F
(14.1°C)
0.6°F
(0.3°C)
82nd Coolest
Coolest since:
1912
47th Warmest
Warmest since:
2012
Ties: 1908, 1935, 1949, 1974
Dec 1958–Aug 1959
9-Month
54.9°F
(12.7°C)
54.8°F
(12.7°C)
0.1°F
(0.0°C)
62nd Coolest
Coolest since:
1904
66th Warmest
Warmest since:
2012
Ties: 2015
Nov 1958–Aug 1959
10-Month
54.2°F
(12.3°C)
53.8°F
(12.1°C)
0.4°F
(0.2°C)
71st Coolest
Coolest since:
1904
57th Warmest
Warmest since:
2012
Ties: 1944, 1981
Oct 1958–Aug 1959
11-Month
54.4°F
(12.4°C)
54.1°F
(12.3°C)
0.3°F
(0.1°C)
68th Coolest
Coolest since:
1904
60th Warmest
Warmest since:
2012
Ties: 1896, 1923, 1944, 2008
Sep 1958–Aug 1959
12-Month
55.6°F
(13.1°C)
55.4°F
(13.0°C)
0.2°F
(0.1°C)
66th Coolest
Coolest since:
1904
62nd Warmest
Warmest since:
2012
Ties: 1981
Mar 1958–Aug 1959
18-Month
58.4°F
(14.7°C)
58.8°F
(14.9°C)
-0.4°F
(-0.2°C)
44th Coolest
Coolest since:
1904
84th Warmest
Warmest since:
2012
Ties: 1906, 1950, 1973, 1975, 2009
Sep 1957–Aug 1959
24-Month
54.7°F
(12.6°C)
55.4°F
(13.0°C)
-0.7°F
(-0.4°C)
23rd Coolest
Coolest since:
1979
104th Warmest
Warmest since:
2017
Ties: 1927, 1960, 1963, 1982
Sep 1956–Aug 1959
36-Month
55.3°F
(12.9°C)
55.4°F
(13.0°C)
-0.1°F
(-0.1°C)
52nd Coolest
Coolest since:
1979
74th Warmest
Warmest since:
2018
Ties: 1927, 1995
Sep 1955–Aug 1959
48-Month
55.3°F
(12.9°C)
55.4°F
(13.0°C)
-0.1°F
(-0.1°C)
47th Coolest
Coolest since:
1980
78th Warmest
Warmest since:
2019
Ties: 1901, 1909, 1910, 1928, 1967
Sep 1954–Aug 1959
60-Month
55.6°F
(13.1°C)
55.3°F
(12.9°C)
0.3°F
(0.2°C)
67th Coolest
Coolest since:
1906
57th Warmest
Warmest since:
2020
Ties: 1922, 1940, 1949, 1950, 1975

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