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


Illinois, Climate Division 5. East

Average Temperature Rankings, August 1999

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
August 1999
1-Month
70.2°F
(21.2°C)
72.1°F
(22.3°C)
-1.9°F
(-1.1°C)
28th Coolest Coolest since: 1997 1915
99th Warmest Warmest since: 1998 1947
Jul–Aug 1999
2-Month
73.9°F
(23.3°C)
73.2°F
(22.9°C)
0.7°F
(0.4°C)
85th Coolest Coolest since: 1998 1915
42nd Warmest Warmest since: 1998 1936
Ties: 1952, 1957, 1998, 2001, 2020
Jun–Aug 1999
3-Month
73.2°F
(22.9°C)
72.3°F
(22.4°C)
0.9°F
(0.5°C)
88th Coolest Coolest since: 1998 1915
39th Warmest Warmest since: 1995 1936
Ties: 1911
May–Aug 1999
4-Month
70.9°F
(21.6°C)
69.4°F
(20.8°C)
1.5°F
(0.8°C)
99th Coolest Coolest since: 1997 1915
28th Warmest Warmest since: 1998 1934
Ties: 1952, 2016
Apr–Aug 1999
5-Month
67.3°F
(19.6°C)
65.5°F
(18.6°C)
1.8°F
(1.0°C)
108th Coolest Coolest since: 1997 1907
19th Warmest Warmest since: 1998 1991
Ties: 1954, 2007, 2011
Mar–Aug 1999
6-Month
62.2°F
(16.8°C)
61.0°F
(16.1°C)
1.2°F
(0.7°C)
100th Coolest Coolest since: 1997 1904, 1907
27th Warmest Warmest since: 1998 2012
Ties: 1896, 1922, 1942, 1946, 1973, 2001
Feb–Aug 1999
7-Month
58.4°F
(14.7°C)
56.2°F
(13.4°C)
2.2°F
(1.3°C)
113th Coolest Coolest since: 1997 1904
14th Warmest Warmest since: 1998 2012
Jan–Aug 1999
8-Month
53.9°F
(12.2°C)
52.1°F
(11.2°C)
1.8°F
(1.0°C)
101st Coolest Coolest since: 1997 1904, 1912
26th Warmest Warmest since: 1998 2012
Ties: 1973
Dec 1998–Aug 1999
9-Month
51.8°F
(11.0°C)
49.5°F
(9.7°C)
2.3°F
(1.3°C)
112th Coolest Coolest since: 1997 1904
14th Warmest Warmest since: 1998 2012
Ties: 1953, 2020
Nov 1998–Aug 1999
10-Month
51.1°F
(10.6°C)
48.5°F
(9.2°C)
2.6°F
(1.4°C)
117th Coolest Coolest since: 1997 1904
9th Warmest Warmest since: 1998 2012
Ties: 1987, 1995, 2000, 2005
Oct 1998–Aug 1999
11-Month
51.5°F
(10.8°C)
48.9°F
(9.4°C)
2.6°F
(1.4°C)
117th Coolest Coolest since: 1997 1904
9th Warmest Warmest since: 1998 2012
Ties: 1954, 1995
Sep 1998–Aug 1999
12-Month
53.1°F
(11.7°C)
50.3°F
(10.2°C)
2.8°F
(1.5°C)
119th Coolest Coolest since: 1998 1904
7th Warmest Warmest since: 1991 2012
Mar 1998–Aug 1999
18-Month
56.3°F
(13.5°C)
53.8°F
(12.1°C)
2.5°F
(1.4°C)
122nd Coolest Coolest since: 1998 1904
4th Warmest Warmest to Date 2012
Sep 1997–Aug 1999
24-Month
53.0°F
(11.7°C)
50.3°F
(10.2°C)
2.7°F
(1.5°C)
123rd Coolest Coolest since: 1998 1905
2nd Warmest Warmest to Date 2017
Ties: 2012
Sep 1996–Aug 1999
36-Month
51.7°F
(10.9°C)
50.3°F
(10.2°C)
1.4°F
(0.7°C)
105th Coolest Coolest since: 1998 1904
19th Warmest Warmest since: 1992 2018
Ties: 1954, 1992
Sep 1995–Aug 1999
48-Month
51.0°F
(10.6°C)
50.3°F
(10.2°C)
0.7°F
(0.4°C)
88th Coolest Coolest since: 1998 1905
35th Warmest Warmest since: 1994 2019
Ties: 1923, 1987, 1994
Sep 1994–Aug 1999
60-Month
51.3°F
(10.7°C)
50.3°F
(10.2°C)
1.0°F
(0.5°C)
95th Coolest Coolest since: 1998 1906
27th Warmest Warmest since: 1995 2020
Ties: 1933, 1987, 1990, 1995, 2000

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Divisional Time Series, published November 2020, retrieved on November 25, 2020 from https://www.ncdc.noaa.gov/cag/