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 August 2021. For more information, please see Climatological Rankings.


Illinois

Average Temperature Rankings, September 1998

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1998
1-Month
70.9°F
(21.6°C)
66.2°F
(19.0°C)
4.7°F
(2.6°C)
120th Coolest Coolest since: 1997 1918
7th Warmest Warmest since: 1939 1925, 1933
Aug–Sep 1998
2-Month
72.9°F
(22.7°C)
69.9°F
(21.1°C)
3.0°F
(1.6°C)
120th Coolest Coolest since: 1997 1967
7th Warmest Warmest since: 1983 1936
Ties: 1925, 1983
Jul–Sep 1998
3-Month
73.7°F
(23.2°C)
71.7°F
(22.1°C)
2.0°F
(1.1°C)
107th Coolest Coolest since: 1997 1967
20th Warmest Warmest since: 1988 1936
Jun–Sep 1998
4-Month
73.2°F
(22.9°C)
71.6°F
(22.0°C)
1.6°F
(0.9°C)
103rd Coolest Coolest since: 1997 1915, 1924
24th Warmest Warmest since: 1988 1936
Ties: 1987, 2012, 2019
May–Sep 1998
5-Month
72.1°F
(22.3°C)
69.8°F
(21.0°C)
2.3°F
(1.3°C)
115th Coolest Coolest since: 1997 1924
12th Warmest Warmest since: 1991 1936
Apr–Sep 1998
6-Month
68.8°F
(20.4°C)
66.7°F
(19.3°C)
2.1°F
(1.1°C)
113th Coolest Coolest since: 1997 1907
14th Warmest Warmest since: 1991 2010
Ties: 1954
Mar–Sep 1998
7-Month
64.8°F
(18.2°C)
62.9°F
(17.2°C)
1.9°F
(1.0°C)
115th Coolest Coolest since: 1997 1924
12th Warmest Warmest since: 1991 2012
Ties: 1925
Feb–Sep 1998
8-Month
61.7°F
(16.5°C)
58.7°F
(14.8°C)
3.0°F
(1.7°C)
122nd Coolest Coolest since: 1997 1904
5th Warmest Warmest since: 1991 2012
Jan–Sep 1998
9-Month
58.4°F
(14.7°C)
55.0°F
(12.8°C)
3.4°F
(1.9°C)
124th Coolest Coolest since: 1997 1904, 1912
3rd Warmest Warmest since: 1921 2012
Dec 1997–Sep 1998
10-Month
55.7°F
(13.2°C)
52.4°F
(11.3°C)
3.3°F
(1.9°C)
122nd Coolest Coolest since: 1997 1904
4th Warmest Warmest since: 1921 2012
Nov 1997–Sep 1998
11-Month
54.2°F
(12.3°C)
51.4°F
(10.8°C)
2.8°F
(1.5°C)
120th Coolest Coolest since: 1997 1904
6th Warmest Warmest since: 1991 2012
Ties: 1991
Oct 1997–Sep 1998
12-Month
54.2°F
(12.3°C)
51.6°F
(10.9°C)
2.6°F
(1.4°C)
119th Coolest Coolest since: 1997 1904
7th Warmest Warmest since: 1932 2012
Ties: 2005
Apr 1997–Sep 1998
18-Month
57.7°F
(14.3°C)
56.6°F
(13.7°C)
1.1°F
(0.6°C)
96th Coolest Coolest since: 1997 1904, 1918
30th Warmest Warmest since: 1992 2012
Ties: 1933
Oct 1996–Sep 1998
24-Month
52.4°F
(11.3°C)
51.6°F
(10.9°C)
0.8°F
(0.4°C)
91st Coolest Coolest since: 1997 1979
34th Warmest Warmest since: 1992 2017
Ties: 2020
Oct 1995–Sep 1998
36-Month
51.6°F
(10.9°C)
51.6°F
(10.9°C)
0.0°F
(0.0°C)
55th Coolest Coolest since: 1997 1979
69th Warmest Warmest since: 1995 2018
Ties: 1916, 1937, 1947, 1953, 1959, 1983, 1995
Oct 1994–Sep 1998
48-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
79th Coolest Coolest since: 1997 1905
44th Warmest Warmest since: 1993 2019
Ties: 1940, 1949, 1976, 1986, 2011
Oct 1993–Sep 1998
60-Month
51.7°F
(10.9°C)
51.5°F
(10.8°C)
0.2°F
(0.1°C)
57th Coolest Coolest since: 1997 1906
65th Warmest Warmest since: 1995 2020
Ties: 1931, 1947, 1953, 1975

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published September 2021, retrieved on September 27, 2021 from https://www.ncdc.noaa.gov/cag/