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 January 2020. For more information, please see Climatological Rankings.


Illinois, Climate Division 8. Southwest

Average Temperature Rankings, May 1991

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
May 1991
1-Month
70.8°F
(21.6°C)
65.1°F
(18.4°C)
5.7°F
(3.2°C)
121st Coolest Coolest since: 1990 1917, 1924
5th Warmest Warmest since: 1987 2018
Apr–May 1991
2-Month
65.0°F
(18.3°C)
60.2°F
(15.7°C)
4.8°F
(2.6°C)
122nd Coolest Coolest since: 1990 1907
4th Warmest Warmest since: 1977 1896
Mar–May 1991
3-Month
59.6°F
(15.3°C)
55.0°F
(12.8°C)
4.6°F
(2.5°C)
123rd Coolest Coolest since: 1990 1960
3rd Warmest Warmest since: 1977 2012
Feb–May 1991
4-Month
54.6°F
(12.6°C)
50.0°F
(10.0°C)
4.6°F
(2.6°C)
123rd Coolest Coolest since: 1990 1978
3rd Warmest Warmest since: 1938 2012
Ties: 1938
Jan–May 1991
5-Month
49.4°F
(9.7°C)
46.1°F
(7.8°C)
3.3°F
(1.9°C)
117th Coolest Coolest since: 1990 1978
9th Warmest Warmest since: 1946 2012
Dec 1990–May 1991
6-Month
47.1°F
(8.4°C)
44.2°F
(6.8°C)
2.9°F
(1.6°C)
116th Coolest Coolest since: 1990 1978
9th Warmest Warmest since: 1932 2012
Ties: 2006
Nov 1990–May 1991
7-Month
47.6°F
(8.7°C)
44.3°F
(6.8°C)
3.3°F
(1.9°C)
119th Coolest Coolest since: 1990 1978
6th Warmest Warmest since: 1932 2012
Oct 1990–May 1991
8-Month
48.6°F
(9.2°C)
46.0°F
(7.8°C)
2.6°F
(1.4°C)
117th Coolest Coolest since: 1990 1978
8th Warmest Warmest since: 1932 2012
Sep 1990–May 1991
9-Month
51.1°F
(10.6°C)
48.6°F
(9.2°C)
2.5°F
(1.4°C)
116th Coolest Coolest since: 1990 1978
9th Warmest Warmest since: 1932 2012
Aug 1990–May 1991
10-Month
53.4°F
(11.9°C)
51.3°F
(10.7°C)
2.1°F
(1.2°C)
116th Coolest Coolest since: 1990 1978
9th Warmest Warmest since: 1939 2012
Ties: 1939
Jul 1990–May 1991
11-Month
55.5°F
(13.1°C)
53.7°F
(12.1°C)
1.8°F
(1.0°C)
114th Coolest Coolest since: 1990 1918
11th Warmest Warmest since: 1955 2012
Jun 1990–May 1991
12-Month
57.1°F
(13.9°C)
55.4°F
(13.0°C)
1.7°F
(0.9°C)
114th Coolest Coolest since: 1990 1904, 1918
11th Warmest Warmest since: 1955 2012
Ties: 1939, 1942
Dec 1989–May 1991
18-Month
53.1°F
(11.7°C)
51.7°F
(10.9°C)
1.4°F
(0.8°C)
104th Coolest Coolest since: 1990 1979
20th Warmest Warmest since: 1955 2017
Ties: 1934, 1953, 2005
Jun 1989–May 1991
24-Month
56.3°F
(13.5°C)
55.4°F
(13.0°C)
0.9°F
(0.5°C)
97th Coolest Coolest since: 1990 1905, 1978
27th Warmest Warmest since: 1988 2017
Ties: 1987, 1988, 2003
Jun 1988–May 1991
36-Month
56.1°F
(13.4°C)
55.4°F
(13.0°C)
0.7°F
(0.4°C)
92nd Coolest Coolest since: 1990 1979
31st Warmest Warmest since: 1989 2018
Ties: 1987, 1988, 1989
Jun 1987–May 1991
48-Month
56.0°F
(13.3°C)
55.4°F
(13.0°C)
0.6°F
(0.3°C)
91st Coolest Coolest since: 1990 1980
31st Warmest Warmest since: 1989 2019
Ties: 1938, 1939, 1944, 1988, 1989, 2004, 2010, 2011
Jun 1986–May 1991
60-Month
56.1°F
(13.4°C)
55.3°F
(12.9°C)
0.8°F
(0.5°C)
91st Coolest Coolest since: 1990 1979, 1980, 1981
30th Warmest Warmest since: 1958 1935, 2019
Ties: 1933, 1937, 1941, 1955, 2005, 2011

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Divisional Time Series, published February 2020, retrieved on February 23, 2020 from https://www.ncdc.noaa.gov/cag/