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 2015

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Period Value 1901-2000
Mean
Amomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
May 2015
1-Month
61.9°F
(16.6°C)
59.7°F
(15.4°C)
2.2°F
(1.2°C)
90th Coolest Coolest since: 2014 1907
36th Warmest Warmest since: 2013 1977
Ties: 2004
Apr–May 2015
2-Month
56.6°F
(13.7°C)
54.1°F
(12.3°C)
2.5°F
(1.4°C)
106th Coolest Coolest since: 2014 1907
20th Warmest Warmest since: 2012 1977
Mar–May 2015
3-Month
49.2°F
(9.6°C)
47.9°F
(8.8°C)
1.3°F
(0.8°C)
86th Coolest Coolest since: 2014 1960
40th Warmest Warmest since: 2012 2012
Ties: 1930, 1936, 1964, 1994
Feb–May 2015
4-Month
40.2°F
(4.6°C)
41.9°F
(5.5°C)
-1.7°F
(-0.9°C)
31st Coolest Coolest since: 2014 1947
95th Warmest Warmest since: 2013 2012
Ties: 1920, 1965
Jan–May 2015
5-Month
36.3°F
(2.4°C)
37.5°F
(3.1°C)
-1.2°F
(-0.7°C)
39th Coolest Coolest since: 2014 1912
87th Warmest Warmest since: 2013 2012
Ties: 1900, 1980
Dec 2014–May 2015
6-Month
35.3°F
(1.8°C)
35.4°F
(1.9°C)
-0.1°F
(-0.1°C)
58th Coolest Coolest since: 2014 1979
67th Warmest Warmest since: 2013 2012
Ties: 1909, 1913, 1980
Nov 2014–May 2015
7-Month
34.7°F
(1.5°C)
35.7°F
(2.1°C)
-1.0°F
(-0.6°C)
32nd Coolest Coolest since: 2014 1904
93rd Warmest Warmest since: 2013 2012
Ties: 1947, 1948, 2008
Oct 2014–May 2015
8-Month
36.7°F
(2.6°C)
37.7°F
(3.2°C)
-1.0°F
(-0.6°C)
28th Coolest Coolest since: 2014 1912
97th Warmest Warmest since: 2013 2012
Ties: 1897, 1924, 1965, 1971, 2019
Sep 2014–May 2015
9-Month
39.5°F
(4.2°C)
40.5°F
(4.7°C)
-1.0°F
(-0.5°C)
26th Coolest Coolest since: 2014 1904
99th Warmest Warmest since: 2013 2012
Ties: 1902
Aug 2014–May 2015
10-Month
42.7°F
(5.9°C)
43.6°F
(6.4°C)
-0.9°F
(-0.5°C)
28th Coolest Coolest since: 2014 1904
97th Warmest Warmest since: 2013 2012
Ties: 1902, 1924, 1952
Jul 2014–May 2015
11-Month
45.1°F
(7.3°C)
46.3°F
(7.9°C)
-1.2°F
(-0.6°C)
21st Coolest Coolest since: 2014 1904
104th Warmest Warmest since: 2013 2012
Ties: 1960
Jun 2014–May 2015
12-Month
47.2°F
(8.4°C)
48.2°F
(9.0°C)
-1.0°F
(-0.6°C)
26th Coolest Coolest since: 2014 1904
99th Warmest Warmest since: 2013 2012
Ties: 1897, 1960
Dec 2013–May 2015
18-Month
41.6°F
(5.3°C)
43.9°F
(6.6°C)
-2.3°F
(-1.3°C)
5th Coolest Coolest since: 1979 1918
119th Warmest Warmest since: 2014 2017
Jun 2013–May 2015
24-Month
46.5°F
(8.1°C)
48.3°F
(9.1°C)
-1.8°F
(-1.0°C)
6th Coolest Coolest since: 1979 1905
118th Warmest Warmest since: 2014 2017
Ties: 1917, 1952
Jun 2012–May 2015
36-Month
47.4°F
(8.6°C)
48.2°F
(9.0°C)
-0.8°F
(-0.4°C)
16th Coolest Coolest since: 1980 1905, 1918, 1979
107th Warmest Warmest since: 2014 2000
Ties: 1899, 1913, 1926, 1961, 1963, 1970, 1978
Jun 2011–May 2015
48-Month
48.8°F
(9.3°C)
48.2°F
(9.0°C)
0.6°F
(0.3°C)
84th Coolest Coolest since: 2011 1980
38th Warmest Warmest since: 2014 2001, 2002, 2007
Ties: 1944, 2010
Jun 2010–May 2015
60-Month
48.9°F
(9.4°C)
48.2°F
(9.0°C)
0.7°F
(0.4°C)
86th Coolest Coolest since: 2011 1907, 1908
35th Warmest Warmest since: 2014 2002
Ties: 1932, 1933, 1943, 1987, 2011

Citing This Page

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