Statewide Rankings

Statewide 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

Average Temperature Rankings, August 2018

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  • Record Coolest
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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 2018
1-Month
74.7°F
(23.7°C)
73.4°F
(23.0°C)
1.3°F
(0.7°C)
97th Coolest
Coolest since:
1915
32nd Warmest
Warmest since:
1947
Ties: 1926, 1935, 1984, 1991, 2006
Jul–Aug 2018
2-Month
74.8°F
(23.8°C)
74.4°F
(23.6°C)
0.4°F
(0.2°C)
73rd Coolest
Coolest since:
1915
56th Warmest
Warmest since:
1936
Jun–Aug 2018
3-Month
74.9°F
(23.8°C)
73.5°F
(23.1°C)
1.4°F
(0.7°C)
103rd Coolest
Coolest since:
1915
26th Warmest
Warmest since:
1936
Ties: 1919, 1930, 1944
May–Aug 2018
4-Month
73.8°F
(23.2°C)
70.6°F
(21.4°C)
3.2°F
(1.8°C)
125th Coolest
Coolest since:
1915
4th Warmest
Warmest since:
1934, 1936
Apr–Aug 2018
5-Month
68.0°F
(20.0°C)
66.8°F
(19.3°C)
1.2°F
(0.7°C)
98th Coolest
Coolest since:
1907
31st Warmest
Warmest since:
1934
Ties: 1900, 1911, 1980, 1986
Mar–Aug 2018
6-Month
63.2°F
(17.3°C)
62.3°F
(16.8°C)
0.9°F
(0.5°C)
87th Coolest
Coolest since:
1904, 1950, 1960
42nd Warmest
Warmest since:
2012
Ties: 1973, 1999
Feb–Aug 2018
7-Month
58.7°F
(14.8°C)
57.5°F
(14.2°C)
1.2°F
(0.6°C)
96th Coolest
Coolest since:
1904
33rd Warmest
Warmest since:
2012
Ties: 1918, 1957, 1983, 1995, 2001
Jan–Aug 2018
8-Month
54.4°F
(12.4°C)
53.5°F
(11.9°C)
0.9°F
(0.5°C)
84th Coolest
Coolest since:
1904, 1912
45th Warmest
Warmest since:
2012
Ties: 1914, 1988
Dec 2017–Aug 2018
9-Month
51.7°F
(10.9°C)
50.9°F
(10.5°C)
0.8°F
(0.4°C)
85th Coolest
Coolest since:
1904
43rd Warmest
Warmest since:
2012
Ties: 1913, 1946, 1957, 1973, 2004
Nov 2017–Aug 2018
10-Month
50.7°F
(10.4°C)
49.9°F
(9.9°C)
0.8°F
(0.5°C)
89th Coolest
Coolest since:
1904
39th Warmest
Warmest since:
2012
Ties: 1913
Oct 2017–Aug 2018
11-Month
51.4°F
(10.8°C)
50.3°F
(10.2°C)
1.1°F
(0.6°C)
95th Coolest
Coolest since:
1904
33rd Warmest
Warmest since:
2012
Ties: 1964
Sep 2017–Aug 2018
12-Month
52.8°F
(11.6°C)
51.6°F
(10.9°C)
1.2°F
(0.7°C)
101st Coolest
Coolest since:
1904
27th Warmest
Warmest since:
2012
Ties: 1922, 1953
Mar 2017–Aug 2018
18-Month
56.4°F
(13.6°C)
55.2°F
(12.9°C)
1.2°F
(0.7°C)
103rd Coolest
Coolest since:
1904
25th Warmest
Warmest since:
2012
Sep 2016–Aug 2018
24-Month
54.0°F
(12.2°C)
51.6°F
(10.9°C)
2.4°F
(1.3°C)
123rd Coolest
Coolest since:
1905
4th Warmest
Warmest since:
2017
Ties: 1999, 2000
Sep 2015–Aug 2018
36-Month
54.4°F
(12.4°C)
51.6°F
(10.9°C)
2.8°F
(1.5°C)
125th Coolest
Coolest since:
1979
1st Warmest
Warmest to Date
2018
Sep 2014–Aug 2018
48-Month
53.5°F
(11.9°C)
51.6°F
(10.9°C)
1.9°F
(1.0°C)
123rd Coolest
Coolest since:
1905
2nd Warmest
Warmest to Date
2019
Sep 2013–Aug 2018
60-Month
52.7°F
(11.5°C)
51.6°F
(10.9°C)
1.1°F
(0.6°C)
106th Coolest
Coolest since:
1906
18th Warmest
Warmest since:
2020
Ties: 1956, 2001, 2005, 2010, 2016

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