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


Illinois

Average Temperature Rankings, August 1999

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
August 1999
1-Month
71.7°F
(22.1°C)
73.4°F
(23.0°C)
-1.7°F
(-0.9°C)
27th Coolest Coolest since: 1997 1915
100th Warmest Warmest since: 1998 1947
Ties: 1912, 1965
Jul–Aug 1999
2-Month
75.1°F
(23.9°C)
74.4°F
(23.6°C)
0.7°F
(0.3°C)
84th Coolest Coolest since: 1998 1915
43rd Warmest Warmest since: 1998 1936
Ties: 1998, 2019
Jun–Aug 1999
3-Month
74.2°F
(23.4°C)
73.5°F
(23.1°C)
0.7°F
(0.3°C)
87th Coolest Coolest since: 1998 1915
40th Warmest Warmest since: 1995 1936
Ties: 1899, 1918, 1925, 1937, 1938, 1984
May–Aug 1999
4-Month
71.6°F
(22.0°C)
70.6°F
(21.4°C)
1.0°F
(0.6°C)
87th Coolest Coolest since: 1997 1915
40th Warmest Warmest since: 1998 1934, 1936
Ties: 1954, 2002
Apr–Aug 1999
5-Month
68.2°F
(20.1°C)
66.8°F
(19.3°C)
1.4°F
(0.8°C)
101st Coolest Coolest since: 1997 1907
26th Warmest Warmest since: 1998 1934
Ties: 2016
Mar–Aug 1999
6-Month
63.2°F
(17.3°C)
62.3°F
(16.8°C)
0.9°F
(0.5°C)
87th Coolest Coolest since: 1997 1904, 1950, 1960
40th Warmest Warmest since: 1998 2012
Ties: 1973, 2018
Feb–Aug 1999
7-Month
59.5°F
(15.3°C)
57.6°F
(14.2°C)
1.9°F
(1.1°C)
112th Coolest Coolest since: 1997 1904
15th Warmest Warmest since: 1998 2012
Jan–Aug 1999
8-Month
55.2°F
(12.9°C)
53.5°F
(11.9°C)
1.7°F
(1.0°C)
102nd Coolest Coolest since: 1997 1904, 1912
25th Warmest Warmest since: 1998 2012
Ties: 2007
Dec 1998–Aug 1999
9-Month
53.0°F
(11.7°C)
50.9°F
(10.5°C)
2.1°F
(1.2°C)
109th Coolest Coolest since: 1997 1904
17th Warmest Warmest since: 1998 2012
Ties: 1953, 2007
Nov 1998–Aug 1999
10-Month
52.2°F
(11.2°C)
49.8°F
(9.9°C)
2.4°F
(1.3°C)
113th Coolest Coolest since: 1997 1904
13th Warmest Warmest since: 1998 2012
Ties: 1954, 2007
Oct 1998–Aug 1999
11-Month
52.6°F
(11.4°C)
50.3°F
(10.2°C)
2.3°F
(1.2°C)
113th Coolest Coolest since: 1997 1904
13th Warmest Warmest since: 1998 2012
Ties: 1987
Sep 1998–Aug 1999
12-Month
54.2°F
(12.3°C)
51.7°F
(10.9°C)
2.5°F
(1.4°C)
120th Coolest Coolest since: 1998 1904
6th Warmest Warmest since: 1991 2012
Ties: 1991, 2006
Mar 1998–Aug 1999
18-Month
57.4°F
(14.1°C)
55.2°F
(12.9°C)
2.2°F
(1.2°C)
122nd Coolest Coolest since: 1998 1904
4th Warmest Warmest since: 1932 2012
Ties: 1932, 2006
Sep 1997–Aug 1999
24-Month
54.0°F
(12.2°C)
51.6°F
(10.9°C)
2.4°F
(1.3°C)
121st Coolest Coolest since: 1998 1905
4th Warmest Warmest to Date 2017
Ties: 2000, 2018
Sep 1996–Aug 1999
36-Month
52.8°F
(11.6°C)
51.6°F
(10.9°C)
1.2°F
(0.7°C)
104th Coolest Coolest since: 1998 1979
20th Warmest Warmest since: 1988 2018
Sep 1995–Aug 1999
48-Month
52.1°F
(11.2°C)
51.6°F
(10.9°C)
0.5°F
(0.3°C)
84th Coolest Coolest since: 1998 1905
39th Warmest Warmest since: 1993 2019
Ties: 1937, 1939, 1940, 1943, 1949, 1954, 1976, 1987, 2011
Sep 1994–Aug 1999
60-Month
52.3°F
(11.3°C)
51.5°F
(10.8°C)
0.8°F
(0.5°C)
86th Coolest Coolest since: 1998 1906
36th Warmest Warmest since: 1995 2020
Ties: 1943, 1958, 1995, 2011

Citing This Page

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