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 2020

View Period (Months):
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
August 2020
1-Month
74.5°F
(23.6°C)
76.0°F
(24.4°C)
-1.5°F
(-0.8°C)
27th Coolest
Coolest since:
1915
102nd Warmest
Warmest since:
1936
Ties: 1942, 2008
Jul–Aug 2020
2-Month
77.2°F
(25.1°C)
77.0°F
(25.0°C)
0.2°F
(0.1°C)
77th Coolest
Coolest since:
1967
52nd Warmest
Warmest since:
1936
Ties: 1896, 1899, 1928, 2021
Jun–Aug 2020
3-Month
76.6°F
(24.8°C)
75.9°F
(24.4°C)
0.7°F
(0.4°C)
85th Coolest
Coolest since:
1915, 1927
44th Warmest
Warmest since:
1936
Ties: 1911
May–Aug 2020
4-Month
73.3°F
(22.9°C)
73.2°F
(22.9°C)
0.1°F
(0.0°C)
62nd Coolest
Coolest since:
1967
67th Warmest
Warmest since:
1936
Ties: 1898, 1996, 2017
Apr–Aug 2020
5-Month
69.3°F
(20.7°C)
69.6°F
(20.9°C)
-0.3°F
(-0.2°C)
46th Coolest
Coolest since:
1907
83rd Warmest
Warmest since:
2010
Ties: 1909, 1960, 1983, 2003
Mar–Aug 2020
6-Month
66.1°F
(18.9°C)
65.5°F
(18.6°C)
0.6°F
(0.3°C)
82nd Coolest
Coolest since:
1904
47th Warmest
Warmest since:
2012
Ties: 1901, 1942, 1985
Feb–Aug 2020
7-Month
62.0°F
(16.7°C)
61.1°F
(16.2°C)
0.9°F
(0.5°C)
91st Coolest
Coolest since:
1904
38th Warmest
Warmest since:
2012
Ties: 1944, 1964, 1995
Jan–Aug 2020
8-Month
58.8°F
(14.9°C)
57.3°F
(14.1°C)
1.5°F
(0.8°C)
101st Coolest
Coolest since:
1912
28th Warmest
Warmest since:
2012
Ties: 1955
Dec 2019–Aug 2020
9-Month
56.7°F
(13.7°C)
54.8°F
(12.7°C)
1.9°F
(1.0°C)
109th Coolest
Coolest since:
1904
19th Warmest
Warmest since:
2012
Ties: 1952
Nov 2019–Aug 2020
10-Month
55.0°F
(12.8°C)
53.8°F
(12.1°C)
1.2°F
(0.7°C)
102nd Coolest
Coolest since:
1904
26th Warmest
Warmest since:
2012
Ties: 1922, 1983
Oct 2019–Aug 2020
11-Month
55.2°F
(12.9°C)
54.1°F
(12.3°C)
1.1°F
(0.6°C)
96th Coolest
Coolest since:
1904
32nd Warmest
Warmest since:
2012
Ties: 1952, 1972, 1974, 1983, 2004
Sep 2019–Aug 2020
12-Month
56.9°F
(13.8°C)
55.4°F
(13.0°C)
1.5°F
(0.8°C)
111th Coolest
Coolest since:
1904
17th Warmest
Warmest since:
2012
Ties: 2007
Mar 2019–Aug 2020
18-Month
59.9°F
(15.5°C)
58.8°F
(14.9°C)
1.1°F
(0.6°C)
102nd Coolest
Coolest since:
1904
26th Warmest
Warmest since:
2012
Ties: 1914, 1935, 1942
Sep 2018–Aug 2020
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: 1939, 1942
Sep 2017–Aug 2020
36-Month
56.6°F
(13.7°C)
55.4°F
(13.0°C)
1.2°F
(0.7°C)
107th Coolest
Coolest since:
1979
19th Warmest
Warmest since:
2018
Ties: 1956
Sep 2016–Aug 2020
48-Month
57.1°F
(13.9°C)
55.3°F
(12.9°C)
1.8°F
(1.0°C)
121st Coolest
Coolest since:
1980
4th Warmest
Warmest since:
2019
Ties: 1934
Sep 2015–Aug 2020
60-Month
57.5°F
(14.2°C)
55.4°F
(13.0°C)
2.1°F
(1.2°C)
123rd Coolest
Coolest since:
1906
1st Warmest
Warmest to Date
2020

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