Climate at a Glance

Statewide Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of December 2020. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, August 2018

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
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)
96th Coolest Coolest since: 2017 1915
31st Warmest Warmest since: 2016 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)
72nd Coolest Coolest since: 2017 1915
55th Warmest Warmest since: 2016 1936
Jun–Aug 2018
3-Month
74.9°F
(23.8°C)
73.5°F
(23.1°C)
1.4°F
(0.7°C)
101st Coolest Coolest since: 2017 1915
26th Warmest Warmest since: 2016 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)
123rd Coolest Coolest since: 2017 1915
4th Warmest Warmest since: 2012 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)
96th Coolest Coolest since: 2017 1907
31st Warmest Warmest since: 2016 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: 2015 1904, 1950, 1960
40th Warmest Warmest since: 2017 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)
94th Coolest Coolest since: 2015 1904
33rd Warmest Warmest since: 2017 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)
82nd Coolest Coolest since: 2015 1904, 1912
45th Warmest Warmest since: 2017 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: 2015 1904
41st Warmest Warmest since: 2017 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: 2015 1904
37th Warmest Warmest since: 2017 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: 2015 1904
31st Warmest Warmest since: 2017 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)
100th Coolest Coolest since: 2015 1904
26th Warmest Warmest since: 2017 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)
102nd Coolest Coolest since: 2015 1904
24th Warmest Warmest since: 2017 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)
121st Coolest Coolest since: 2016 1905
4th Warmest Warmest since: 2017 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)
123rd Coolest Coolest since: 2017 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)
121st Coolest Coolest since: 2017 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: 2017 1906
16th Warmest Warmest since: 2016 2020
Ties: 1956, 2001, 2005, 2010, 2016

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2021, retrieved on January 26, 2021 from https://www.ncdc.noaa.gov/cag/