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 January 1895. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, May 2018

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Amomaly Rank
(1895-2018)
Warmest/Coolest
Since
Record
May 2018
1-Month
70.7°F
(21.5°C)
62.1°F
(16.7°C)
8.6°F
(4.8°C)
124ᵗʰ Coolest Coolest since: 2017 1917
1ˢᵗ Warmest Warmest to Date 2018
Apr–May 2018
2-Month
57.8°F
(14.3°C)
56.9°F
(13.8°C)
0.9°F
(0.5°C)
80ᵗʰ Coolest Coolest since: 2016 1907
45ᵗʰ Warmest Warmest since: 2017 1896
Ties: 1902, 1963, 1969, 1981
Mar–May 2018
3-Month
51.6°F
(10.9°C)
51.2°F
(10.7°C)
0.4°F
(0.2°C)
69ᵗʰ Coolest Coolest since: 2014 1960
56ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1968, 1992, 1994
Feb–May 2018
4-Month
46.6°F
(8.1°C)
45.6°F
(7.6°C)
1.0°F
(0.5°C)
81ˢᵗ Coolest Coolest since: 2015 1978
44ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1903, 1915
Jan–May 2018
5-Month
42.1°F
(5.6°C)
41.6°F
(5.3°C)
0.5°F
(0.3°C)
71ˢᵗ Coolest Coolest since: 2015 1978, 1979
54ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1956
Dec 2017–May 2018
6-Month
40.1°F
(4.5°C)
39.6°F
(4.2°C)
0.5°F
(0.3°C)
72ⁿᵈ Coolest Coolest since: 2015 1978
52ⁿᵈ Warmest Warmest since: 2017 2012
Ties: 1950, 1986, 1988
Nov 2017–May 2018
7-Month
40.3°F
(4.6°C)
39.7°F
(4.3°C)
0.6°F
(0.3°C)
74ᵗʰ Coolest Coolest since: 2015 1904
50ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1933, 1986
Oct 2017–May 2018
8-Month
42.6°F
(5.9°C)
41.7°F
(5.4°C)
0.9°F
(0.5°C)
89ᵗʰ Coolest Coolest since: 2015 1904, 1978
35ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1903, 1914, 1949, 1953, 1990, 2010
Sep 2017–May 2018
9-Month
45.5°F
(7.5°C)
44.4°F
(6.9°C)
1.1°F
(0.6°C)
97ᵗʰ Coolest Coolest since: 2015 1904
27ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1934, 1949, 1957, 1983
Aug 2017–May 2018
10-Month
48.0°F
(8.9°C)
47.3°F
(8.5°C)
0.7°F
(0.4°C)
84ᵗʰ Coolest Coolest since: 2015 1904
40ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1896, 1898, 1983
Jul 2017–May 2018
11-Month
50.5°F
(10.3°C)
49.8°F
(9.9°C)
0.7°F
(0.4°C)
84ᵗʰ Coolest Coolest since: 2015 1904
40ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1948, 1964, 1983, 1985, 2008, 2011
Jun 2017–May 2018
12-Month
52.4°F
(11.3°C)
51.7°F
(10.9°C)
0.7°F
(0.4°C)
84ᵗʰ Coolest Coolest since: 2015 1904
40ᵗʰ Warmest Warmest since: 2017 2012
Ties: 1949, 1964, 2008
Dec 2016–May 2018
18-Month
49.6°F
(9.8°C)
47.6°F
(8.7°C)
2.0°F
(1.1°C)
111ᵗʰ Coolest Coolest since: 2016 1979
12ᵗʰ Warmest Warmest since: 2017 2017
Ties: 1939
Jun 2016–May 2018
24-Month
54.0°F
(12.2°C)
51.6°F
(10.9°C)
2.4°F
(1.3°C)
118ᵗʰ Coolest Coolest since: 2016 1905
5ᵗʰ Warmest Warmest since: 2017 2017
Jun 2015–May 2018
36-Month
54.2°F
(12.3°C)
51.6°F
(10.9°C)
2.6°F
(1.4°C)
121ˢᵗ Coolest Coolest since: 2017 1979
1ˢᵗ Warmest Warmest to Date 2018
Jun 2014–May 2018
48-Month
53.3°F
(11.8°C)
51.6°F
(10.9°C)
1.7°F
(0.9°C)
119ᵗʰ Coolest Coolest since: 2017 1980
2ⁿᵈ Warmest Warmest since: 2007 1935
Ties: 2002, 2007
Jun 2013–May 2018
60-Month
52.6°F
(11.4°C)
51.6°F
(10.9°C)
1.0°F
(0.5°C)
103ʳᵈ Coolest Coolest since: 2017 1906, 1907, 1908, 1981
17ᵗʰ Warmest Warmest since: 2017 2002
Ties: 1936, 1956, 2000, 2010, 2017

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2018, retrieved on September 25, 2018 from https://www.ncdc.noaa.gov/cag/