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


Illinois, Climate Division 1. Northwest

Average Temperature Rankings, May 1999

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Period Value 1901-2000
Mean
Amomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
May 1999
1-Month
62.5°F
(16.9°C)
59.7°F
(15.4°C)
2.8°F
(1.5°C)
96th Coolest Coolest since: 1997 1907
30th Warmest Warmest since: 1998 1977
Apr–May 1999
2-Month
56.9°F
(13.8°C)
54.0°F
(12.2°C)
2.9°F
(1.6°C)
109th Coolest Coolest since: 1997 1907
17th Warmest Warmest since: 1998 1977
Ties: 1962
Mar–May 1999
3-Month
49.7°F
(9.8°C)
47.9°F
(8.8°C)
1.8°F
(1.0°C)
98th Coolest Coolest since: 1997 1960
28th Warmest Warmest since: 1998 2012
Feb–May 1999
4-Month
45.7°F
(7.6°C)
41.9°F
(5.5°C)
3.8°F
(2.1°C)
115th Coolest Coolest since: 1997 1947
11th Warmest Warmest since: 1998 2012
Ties: 2010
Jan–May 1999
5-Month
40.3°F
(4.6°C)
37.5°F
(3.1°C)
2.8°F
(1.5°C)
110th Coolest Coolest since: 1997 1912
16th Warmest Warmest since: 1998 2012
Ties: 2002
Dec 1998–May 1999
6-Month
39.0°F
(3.9°C)
35.4°F
(1.9°C)
3.6°F
(2.0°C)
117th Coolest Coolest since: 1997 1979
8th Warmest Warmest since: 1998 2012
Ties: 2002, 2006
Nov 1998–May 1999
7-Month
39.5°F
(4.2°C)
35.6°F
(2.0°C)
3.9°F
(2.2°C)
116th Coolest Coolest since: 1997 1904
9th Warmest Warmest since: 1998 2012
Oct 1998–May 1999
8-Month
41.3°F
(5.2°C)
37.7°F
(3.2°C)
3.6°F
(2.0°C)
117th Coolest Coolest since: 1997 1912
8th Warmest Warmest since: 1998 2012
Ties: 1932, 1987
Sep 1998–May 1999
9-Month
44.2°F
(6.8°C)
40.5°F
(4.7°C)
3.7°F
(2.1°C)
119th Coolest Coolest since: 1998 1904
6th Warmest Warmest since: 1998 2012
Ties: 1998
Aug 1998–May 1999
10-Month
47.1°F
(8.4°C)
43.6°F
(6.4°C)
3.5°F
(2.0°C)
119th Coolest Coolest since: 1998 1904
6th Warmest Warmest since: 1932 2012
Jul 1998–May 1999
11-Month
49.5°F
(9.7°C)
46.4°F
(8.0°C)
3.1°F
(1.7°C)
120th Coolest Coolest since: 1998 1904
5th Warmest Warmest since: 1932 2012
Ties: 1921, 2006
Jun 1998–May 1999
12-Month
51.1°F
(10.6°C)
48.2°F
(9.0°C)
2.9°F
(1.6°C)
118th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1932 2012
Ties: 2000
Dec 1997–May 1999
18-Month
47.7°F
(8.7°C)
43.9°F
(6.6°C)
3.8°F
(2.1°C)
122nd Coolest Coolest since: 1998 1918
2nd Warmest Warmest to Date 2017
Jun 1997–May 1999
24-Month
50.9°F
(10.5°C)
48.2°F
(9.0°C)
2.7°F
(1.5°C)
119th Coolest Coolest since: 1998 1905
5th Warmest Warmest to Date 2017
Jun 1996–May 1999
36-Month
49.6°F
(9.8°C)
48.2°F
(9.0°C)
1.4°F
(0.8°C)
105th Coolest Coolest since: 1998 1905, 1918, 1979
18th Warmest Warmest since: 1992 2000
Ties: 1955, 1992, 2005
Jun 1995–May 1999
48-Month
49.0°F
(9.4°C)
48.1°F
(8.9°C)
0.9°F
(0.5°C)
89th Coolest Coolest since: 1998 1980
33rd Warmest Warmest since: 1992 2001, 2002, 2007
Ties: 1932, 1955
Jun 1994–May 1999
60-Month
49.1°F
(9.5°C)
48.2°F
(9.0°C)
0.9°F
(0.5°C)
96th Coolest Coolest since: 1998 1907, 1908
25th Warmest Warmest since: 1992 2002
Ties: 1923, 1941, 1989, 2018

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Divisional Time Series, published September 2019, retrieved on September 20, 2019 from https://www.ncdc.noaa.gov/cag/