Climate at a Glance

Divisional 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 June 2021. For more information, please see Climatological Rankings.


Illinois, Climate Division 8. Southwest

Average Temperature Rankings, May 2021

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
May 2021
1-Month
64.0°F
(17.8°C)
65.1°F
(18.4°C)
-1.1°F
(-0.6°C)
44th Coolest Coolest since: 2020 1917, 1924
84th Warmest Warmest since: 2019 2018
Ties: 1963
Apr–May 2021
2-Month
59.8°F
(15.4°C)
60.2°F
(15.7°C)
-0.4°F
(-0.3°C)
42nd Coolest Coolest since: 2020 1907
86th Warmest Warmest since: 2019 1896
Ties: 1929, 1939, 1952
Mar–May 2021
3-Month
56.9°F
(13.8°C)
55.0°F
(12.8°C)
1.9°F
(1.0°C)
100th Coolest Coolest since: 2020 1960
28th Warmest Warmest since: 2017 2012
Ties: 1910
Feb–May 2021
4-Month
49.4°F
(9.7°C)
50.0°F
(10.0°C)
-0.6°F
(-0.3°C)
51st Coolest Coolest since: 2015 1978
77th Warmest Warmest since: 2020 2012
Ties: 1943
Jan–May 2021
5-Month
46.4°F
(8.0°C)
46.2°F
(7.9°C)
0.2°F
(0.1°C)
62nd Coolest Coolest since: 2015 1978
66th Warmest Warmest since: 2020 2012
Ties: 1931, 1989
Dec 2020–May 2021
6-Month
44.8°F
(7.1°C)
44.2°F
(6.8°C)
0.6°F
(0.3°C)
74th Coolest Coolest since: 2018 1978
53rd Warmest Warmest since: 2020 2012
Ties: 1909, 1983, 1985, 2018
Nov 2020–May 2021
7-Month
45.6°F
(7.6°C)
44.3°F
(6.8°C)
1.3°F
(0.8°C)
94th Coolest Coolest since: 2019 1978
33rd Warmest Warmest since: 2020 2012
Ties: 1949, 1950, 1986
Oct 2020–May 2021
8-Month
46.9°F
(8.3°C)
46.0°F
(7.8°C)
0.9°F
(0.5°C)
87th Coolest Coolest since: 2019 1978
40th Warmest Warmest since: 2020 2012
Ties: 1967
Sep 2020–May 2021
9-Month
49.3°F
(9.6°C)
48.5°F
(9.2°C)
0.8°F
(0.4°C)
87th Coolest Coolest since: 2015 1978
40th Warmest Warmest since: 2020 2012
Ties: 1896, 1909, 2008
Aug 2020–May 2021
10-Month
51.9°F
(11.1°C)
51.3°F
(10.7°C)
0.6°F
(0.4°C)
80th Coolest Coolest since: 2015 1978
47th Warmest Warmest since: 2020 2012
Ties: 1896, 1923, 1964
Jul 2020–May 2021
11-Month
54.4°F
(12.4°C)
53.7°F
(12.1°C)
0.7°F
(0.3°C)
84th Coolest Coolest since: 2015 1918
43rd Warmest Warmest since: 2020 2012
Ties: 1931, 1986, 1995
Jun 2020–May 2021
12-Month
56.2°F
(13.4°C)
55.4°F
(13.0°C)
0.8°F
(0.4°C)
88th Coolest Coolest since: 2018 1904, 1918
39th Warmest Warmest since: 2020 2012
Ties: 1919, 1995, 2018
Dec 2019–May 2021
18-Month
53.1°F
(11.7°C)
51.7°F
(10.9°C)
1.4°F
(0.8°C)
105th Coolest Coolest since: 2019 1979
21st Warmest Warmest since: 2020 2017
Ties: 1934, 1953, 1991, 2005
Jun 2019–May 2021
24-Month
56.5°F
(13.6°C)
55.3°F
(12.9°C)
1.2°F
(0.7°C)
105th Coolest Coolest since: 2019 1905, 1978
21st Warmest Warmest since: 2020 2017
Ties: 1923, 1938
Jun 2018–May 2021
36-Month
56.6°F
(13.7°C)
55.4°F
(13.0°C)
1.2°F
(0.7°C)
105th Coolest Coolest since: 2020 1979
20th Warmest Warmest since: 2020 2018
Ties: 2020
Jun 2017–May 2021
48-Month
56.5°F
(13.6°C)
55.4°F
(13.0°C)
1.1°F
(0.6°C)
105th Coolest Coolest since: 2017 1980
19th Warmest Warmest since: 2020 2019
Ties: 1933, 2017
Jun 2016–May 2021
60-Month
57.1°F
(13.9°C)
55.4°F
(13.0°C)
1.7°F
(0.9°C)
121st Coolest Coolest since: 2019 1979, 1980, 1981
2nd Warmest Warmest since: 2020 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Divisional Time Series, published July 2021, retrieved on July 29, 2021 from https://www.ncdc.noaa.gov/cag/