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 August 2019. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, May 1999

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  • Record Warmest
Period Value 1901-2000
Mean
Amomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
May 1999
1-Month
64.1°F
(17.8°C)
62.1°F
(16.7°C)
2.0°F
(1.1°C)
88th Coolest Coolest since: 1997 1917
38th Warmest Warmest since: 1998 2018
Ties: 1986
Apr–May 1999
2-Month
59.2°F
(15.1°C)
56.8°F
(13.8°C)
2.4°F
(1.3°C)
105th Coolest Coolest since: 1997 1907
21st Warmest Warmest since: 1998 1896
Ties: 1921, 1959, 2017
Mar–May 1999
3-Month
52.2°F
(11.2°C)
51.1°F
(10.6°C)
1.1°F
(0.6°C)
81st Coolest Coolest since: 1997 1960
45th Warmest Warmest since: 1998 2012
Ties: 1930, 1981
Feb–May 1999
4-Month
48.5°F
(9.2°C)
45.6°F
(7.6°C)
2.9°F
(1.6°C)
111th Coolest Coolest since: 1997 1978
15th Warmest Warmest since: 1998 2012
Jan–May 1999
5-Month
43.8°F
(6.6°C)
41.6°F
(5.3°C)
2.2°F
(1.3°C)
108th Coolest Coolest since: 1997 1978, 1979
18th Warmest Warmest since: 1998 2012
Ties: 1911, 1932, 1976
Dec 1998–May 1999
6-Month
42.4°F
(5.8°C)
39.6°F
(4.2°C)
2.8°F
(1.6°C)
113th Coolest Coolest since: 1997 1978
12th Warmest Warmest since: 1998 2012
Ties: 2002
Nov 1998–May 1999
7-Month
42.8°F
(6.0°C)
39.7°F
(4.3°C)
3.1°F
(1.7°C)
114th Coolest Coolest since: 1997 1904
11th Warmest Warmest since: 1998 2012
Oct 1998–May 1999
8-Month
44.6°F
(7.0°C)
41.7°F
(5.4°C)
2.9°F
(1.6°C)
116th Coolest Coolest since: 1997 1904, 1978
9th Warmest Warmest since: 1998 2012
Sep 1998–May 1999
9-Month
47.5°F
(8.6°C)
44.4°F
(6.9°C)
3.1°F
(1.7°C)
118th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1932 2012
Aug 1998–May 1999
10-Month
50.2°F
(10.1°C)
47.2°F
(8.4°C)
3.0°F
(1.7°C)
118th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1932 2012
Jul 1998–May 1999
11-Month
52.5°F
(11.4°C)
49.8°F
(9.9°C)
2.7°F
(1.5°C)
118th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1932 2012
Ties: 1921
Jun 1998–May 1999
12-Month
54.1°F
(12.3°C)
51.6°F
(10.9°C)
2.5°F
(1.4°C)
118th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1932 2012
Dec 1997–May 1999
18-Month
50.8°F
(10.4°C)
47.6°F
(8.7°C)
3.2°F
(1.7°C)
122nd Coolest Coolest since: 1998 1979
2nd Warmest Warmest to Date 2017
Jun 1997–May 1999
24-Month
53.8°F
(12.1°C)
51.7°F
(10.9°C)
2.1°F
(1.2°C)
117th Coolest Coolest since: 1998 1905
7th Warmest Warmest since: 1955 2017
Ties: 1955
Jun 1996–May 1999
36-Month
52.6°F
(11.4°C)
51.6°F
(10.9°C)
1.0°F
(0.5°C)
97th Coolest Coolest since: 1998 1979
26th Warmest Warmest since: 1992 2018
Ties: 1991, 2005
Jun 1995–May 1999
48-Month
52.2°F
(11.2°C)
51.6°F
(10.9°C)
0.6°F
(0.3°C)
86th Coolest Coolest since: 1998 1980
36th Warmest Warmest since: 1993 2019
Ties: 1937, 1944, 1958, 1987, 2010, 2015
Jun 1994–May 1999
60-Month
52.3°F
(11.3°C)
51.6°F
(10.9°C)
0.7°F
(0.4°C)
90th Coolest Coolest since: 1998 1906, 1907, 1908, 1981
31st Warmest Warmest since: 1993 2002
Ties: 1925, 1933, 1939, 1990, 1993, 2015

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2019, retrieved on September 21, 2019 from https://www.ncdc.noaa.gov/cag/