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


Illinois

Average Temperature Rankings, December 1999

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2018)
Warmest/Coolest
Since
Record
December 1999
1-Month
32.6°F
(0.3°C)
29.4°F
(-1.4°C)
3.2°F
(1.7°C)
90th Coolest Coolest since: 1997 1983
35th Warmest Warmest since: 1998 2015
Ties: 1952, 1970
Nov–Dec 1999
2-Month
40.5°F
(4.7°C)
35.1°F
(1.7°C)
5.4°F
(3.0°C)
117th Coolest Coolest since: 1998 1950
8th Warmest Warmest since: 1994 2015
Oct–Dec 1999
3-Month
45.2°F
(7.3°C)
41.7°F
(5.4°C)
3.5°F
(1.9°C)
114th Coolest Coolest since: 1997 1976
11th Warmest Warmest since: 1998 1931
Sep–Dec 1999
4-Month
50.2°F
(10.1°C)
47.8°F
(8.8°C)
2.4°F
(1.3°C)
113th Coolest Coolest since: 1997 1976
12th Warmest Warmest since: 1998 1931
Ties: 1965
Aug–Dec 1999
5-Month
54.5°F
(12.5°C)
52.9°F
(11.6°C)
1.6°F
(0.9°C)
104th Coolest Coolest since: 1997 1976
21st Warmest Warmest since: 1998 1931
Ties: 1965, 2003, 2005
Jul–Dec 1999
6-Month
58.5°F
(14.7°C)
56.7°F
(13.7°C)
1.8°F
(1.0°C)
111th Coolest Coolest since: 1997 1976
14th Warmest Warmest since: 1998 1931
Ties: 1953, 2012
Jun–Dec 1999
7-Month
60.5°F
(15.8°C)
58.8°F
(14.9°C)
1.7°F
(0.9°C)
108th Coolest Coolest since: 1997 1917
17th Warmest Warmest since: 1998 1931
Ties: 2005, 2012
May–Dec 1999
8-Month
60.9°F
(16.1°C)
59.2°F
(15.1°C)
1.7°F
(1.0°C)
106th Coolest Coolest since: 1997 1917
19th Warmest Warmest since: 1998 1931
Ties: 1971, 1991
Apr–Dec 1999
9-Month
60.2°F
(15.7°C)
58.4°F
(14.7°C)
1.8°F
(1.0°C)
108th Coolest Coolest since: 1997 1917
17th Warmest Warmest since: 1998 1931
Mar–Dec 1999
10-Month
58.0°F
(14.4°C)
56.5°F
(13.6°C)
1.5°F
(0.8°C)
106th Coolest Coolest since: 1997 1917
19th Warmest Warmest since: 1998 2012
Ties: 1953, 2017
Feb–Dec 1999
11-Month
56.1°F
(13.4°C)
54.0°F
(12.2°C)
2.1°F
(1.2°C)
115th Coolest Coolest since: 1997 1917
10th Warmest Warmest since: 1998 2012
Ties: 1954
Jan–Dec 1999
12-Month
53.5°F
(11.9°C)
51.6°F
(10.9°C)
1.9°F
(1.0°C)
107th Coolest Coolest since: 1997 1917
18th Warmest Warmest since: 1998 2012
Jul 1998–Dec 1999
18-Month
55.6°F
(13.1°C)
53.3°F
(11.8°C)
2.3°F
(1.3°C)
118th Coolest Coolest since: 1998 1904
6th Warmest Warmest since: 1998 2012
Ties: 1998
Jan 1998–Dec 1999
24-Month
54.4°F
(12.4°C)
51.6°F
(10.9°C)
2.8°F
(1.5°C)
121st Coolest Coolest since: 1998 1904, 1979
3rd Warmest Warmest to Date 2017
Jan 1997–Dec 1999
36-Month
53.2°F
(11.8°C)
51.6°F
(10.9°C)
1.6°F
(0.9°C)
112th Coolest Coolest since: 1998 1905
11th Warmest Warmest since: 1955 2017
Ties: 1923, 1932
Jan 1996–Dec 1999
48-Month
52.5°F
(11.4°C)
51.6°F
(10.9°C)
0.9°F
(0.5°C)
100th Coolest Coolest since: 1998 1905
22nd Warmest Warmest since: 1993 2001, 2018
Ties: 1935, 1936, 1954, 1990, 1991, 1993, 2009
Jan 1995–Dec 1999
60-Month
52.3°F
(11.3°C)
51.6°F
(10.9°C)
0.7°F
(0.4°C)
87th Coolest Coolest since: 1998 1905
34th Warmest Warmest since: 1994 2002
Ties: 1987, 1988, 1992

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published December 2019, retrieved on December 14, 2019 from https://www.ncdc.noaa.gov/cag/