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 July 2022. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, October 1999

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
October 1999
1-Month
54.5°F
(12.5°C)
54.6°F
(12.6°C)
-0.1°F
(-0.1°C)
59th Coolest Coolest since: 1993 1925
69th Warmest Warmest since: 1998 1963
Ties: 1968, 2003, 2013
Sep–Oct 1999
2-Month
59.8°F
(15.4°C)
60.4°F
(15.8°C)
-0.6°F
(-0.4°C)
50th Coolest Coolest since: 1996 1917
78th Warmest Warmest since: 1998 1897, 2016
Ties: 1924, 1926, 1968
Aug–Oct 1999
3-Month
63.8°F
(17.7°C)
64.8°F
(18.2°C)
-1.0°F
(-0.5°C)
32nd Coolest Coolest since: 1993 1917
96th Warmest Warmest since: 1998 1947
Ties: 1942, 1945, 1949, 1965
Jul–Oct 1999
4-Month
67.5°F
(19.7°C)
67.5°F
(19.7°C)
0.0°F
(0.0°C)
68th Coolest Coolest since: 1997 1917
60th Warmest Warmest since: 1998 1936
Ties: 1911, 1984
Jun–Oct 1999
5-Month
68.4°F
(20.2°C)
68.2°F
(20.1°C)
0.2°F
(0.1°C)
72nd Coolest Coolest since: 1997 1917
56th Warmest Warmest since: 1998 1936
May–Oct 1999
6-Month
67.7°F
(19.8°C)
67.2°F
(19.6°C)
0.5°F
(0.2°C)
75th Coolest Coolest since: 1997 1917
53rd Warmest Warmest since: 1998 1936
Ties: 1995
Apr–Oct 1999
7-Month
65.8°F
(18.8°C)
65.0°F
(18.3°C)
0.8°F
(0.5°C)
87th Coolest Coolest since: 1997 1917
41st Warmest Warmest since: 1998 2010
Ties: 1901, 1913, 1956, 1971, 2001
Mar–Oct 1999
8-Month
62.4°F
(16.9°C)
61.9°F
(16.6°C)
0.5°F
(0.3°C)
85th Coolest Coolest since: 1997 1917
43rd Warmest Warmest since: 1998 2012
Ties: 1901, 1910, 1942, 1983, 2002, 2006
Feb–Oct 1999
9-Month
59.6°F
(15.3°C)
58.2°F
(14.6°C)
1.4°F
(0.7°C)
107th Coolest Coolest since: 1997 1917
21st Warmest Warmest since: 1998 2012
Ties: 1973, 1986
Jan–Oct 1999
10-Month
56.1°F
(13.4°C)
54.9°F
(12.7°C)
1.2°F
(0.7°C)
96th Coolest Coolest since: 1997 1904
32nd Warmest Warmest since: 1998 2012
Ties: 1932, 1944
Dec 1998–Oct 1999
11-Month
54.2°F
(12.3°C)
52.6°F
(11.4°C)
1.6°F
(0.9°C)
103rd Coolest Coolest since: 1997 1904
24th Warmest Warmest since: 1998 2012
Ties: 2010
Nov 1998–Oct 1999
12-Month
53.5°F
(11.9°C)
51.6°F
(10.9°C)
1.9°F
(1.0°C)
110th Coolest Coolest since: 1997 1904
17th Warmest Warmest since: 1998 2012
Ties: 1919, 1983
May 1998–Oct 1999
18-Month
58.8°F
(14.9°C)
56.8°F
(13.8°C)
2.0°F
(1.1°C)
120th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1954 2012
Nov 1997–Oct 1999
24-Month
53.9°F
(12.2°C)
51.6°F
(10.9°C)
2.3°F
(1.3°C)
122nd Coolest Coolest since: 1998 1905
4th Warmest Warmest to Date 2017
Ties: 2000
Nov 1996–Oct 1999
36-Month
52.8°F
(11.6°C)
51.6°F
(10.9°C)
1.2°F
(0.7°C)
106th Coolest Coolest since: 1998 1904, 1979
19th Warmest Warmest since: 1956 2018
Ties: 1921, 2004
Nov 1995–Oct 1999
48-Month
52.1°F
(11.2°C)
51.6°F
(10.9°C)
0.5°F
(0.3°C)
82nd Coolest Coolest since: 1998 1905
42nd Warmest Warmest since: 1993 2019
Ties: 1921, 1940, 1949, 1954, 2016
Nov 1994–Oct 1999
60-Month
52.3°F
(11.3°C)
51.6°F
(10.9°C)
0.7°F
(0.4°C)
89th Coolest Coolest since: 1998 1905, 1906
34th Warmest Warmest since: 1992 2002, 2020
Ties: 1932, 1987, 1989

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published August 2022, retrieved on August 17, 2022 from https://www.ncei.noaa.gov/cag/