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, May 2018

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
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)
128th Coolest
Coolest since:
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)
84th Coolest
Coolest since:
1907
45th Warmest
Warmest since:
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)
71st Coolest
Coolest since:
1960
58th Warmest
Warmest since:
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)
85th Coolest
Coolest since:
1978
44th Warmest
Warmest since:
2012
Ties: 1903, 1915, 2020
Jan–May 2018
5-Month
42.1°F
(5.6°C)
41.6°F
(5.3°C)
0.5°F
(0.3°C)
74th Coolest
Coolest since:
1978, 1979
55th Warmest
Warmest since:
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:
1978
56th Warmest
Warmest since:
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)
75th Coolest
Coolest since:
1904
53rd Warmest
Warmest since:
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)
90th Coolest
Coolest since:
1904, 1978
38th Warmest
Warmest since:
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)
99th Coolest
Coolest since:
1904
29th Warmest
Warmest since:
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)
86th Coolest
Coolest since:
1904
42nd Warmest
Warmest since:
2012
Ties: 1896, 1898, 1983, 2021
Jul 2017–May 2018
11-Month
50.5°F
(10.3°C)
49.8°F
(9.9°C)
0.7°F
(0.4°C)
85th Coolest
Coolest since:
1904
43rd Warmest
Warmest since:
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)
85th Coolest
Coolest since:
1904
43rd Warmest
Warmest since:
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)
115th Coolest
Coolest since:
1979
12th Warmest
Warmest since:
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)
122nd Coolest
Coolest since:
1905
5th Warmest
Warmest since:
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)
125th Coolest
Coolest since:
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)
122nd Coolest
Coolest since:
1980
3rd Warmest
Warmest since:
2019
Ties: 2002, 2007, 2020
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:
1906, 1907, 1908, 1981
21st Warmest
Warmest since:
2020
Ties: 1936, 1956, 2000, 2010, 2017

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