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


Illinois

Average Temperature Rankings, August 1940

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
August 1940
1-Month
74.0°F
(23.3°C)
73.4°F
(23.0°C)
0.6°F
(0.3°C)
76th Coolest Coolest since: 1939 1915
51st Warmest Warmest since: 1938 1947
Ties: 1922, 1956, 1968
Jul–Aug 1940
2-Month
75.0°F
(23.9°C)
74.4°F
(23.6°C)
0.6°F
(0.3°C)
81st Coolest Coolest since: 1939 1915
46th Warmest Warmest since: 1938 1936
Ties: 1899, 2003, 2020
Jun–Aug 1940
3-Month
74.1°F
(23.4°C)
73.4°F
(23.0°C)
0.7°F
(0.4°C)
80th Coolest Coolest since: 1939 1915
47th Warmest Warmest since: 1938 1936
Ties: 1957, 1973
May–Aug 1940
4-Month
70.3°F
(21.3°C)
70.6°F
(21.4°C)
-0.3°F
(-0.1°C)
53rd Coolest Coolest since: 1935 1915
74th Warmest Warmest since: 1939 1934, 1936
Ties: 1905, 1925, 2013, 2017
Apr–Aug 1940
5-Month
66.2°F
(19.0°C)
66.8°F
(19.3°C)
-0.6°F
(-0.3°C)
37th Coolest Coolest since: 1935 1907
90th Warmest Warmest since: 1939 1934
Ties: 1960, 1974, 2004
Mar–Aug 1940
6-Month
61.2°F
(16.2°C)
62.3°F
(16.8°C)
-1.1°F
(-0.6°C)
25th Coolest Coolest since: 1928 1904, 1950, 1960
102nd Warmest Warmest since: 1939 2012
Ties: 1909, 1965, 1969, 1971, 1978, 1982
Feb–Aug 1940
7-Month
56.6°F
(13.7°C)
57.5°F
(14.2°C)
-0.9°F
(-0.5°C)
31st Coolest Coolest since: 1929 1904
96th Warmest Warmest since: 1939 2012
Ties: 1900, 1965, 1971
Jan–Aug 1940
8-Month
51.2°F
(10.7°C)
53.5°F
(11.9°C)
-2.3°F
(-1.2°C)
9th Coolest Coolest since: 1924 1904, 1912
118th Warmest Warmest since: 1939 2012
Dec 1939–Aug 1940
9-Month
49.3°F
(9.6°C)
50.9°F
(10.5°C)
-1.6°F
(-0.9°C)
17th Coolest Coolest since: 1920 1904
109th Warmest Warmest since: 1939 2012
Nov 1939–Aug 1940
10-Month
48.4°F
(9.1°C)
49.9°F
(9.9°C)
-1.5°F
(-0.8°C)
17th Coolest Coolest since: 1920 1904
109th Warmest Warmest since: 1939 2012
Ties: 1918, 1984
Oct 1939–Aug 1940
11-Month
49.1°F
(9.5°C)
50.3°F
(10.2°C)
-1.2°F
(-0.7°C)
22nd Coolest Coolest since: 1926 1904
104th Warmest Warmest since: 1939 2012
Ties: 1984, 1997
Sep 1939–Aug 1940
12-Month
50.9°F
(10.5°C)
51.6°F
(10.9°C)
-0.7°F
(-0.4°C)
34th Coolest Coolest since: 1929 1904
92nd Warmest Warmest since: 1939 2012
Mar 1939–Aug 1940
18-Month
54.9°F
(12.7°C)
55.2°F
(12.9°C)
-0.3°F
(-0.2°C)
51st Coolest Coolest since: 1936 1904
75th Warmest Warmest since: 1939 2012
Ties: 1897
Sep 1938–Aug 1940
24-Month
52.0°F
(11.1°C)
51.6°F
(10.9°C)
0.4°F
(0.2°C)
80th Coolest Coolest since: 1937 1905
45th Warmest Warmest since: 1939 2017
Ties: 1901, 1976, 1989
Sep 1937–Aug 1940
36-Month
52.2°F
(11.2°C)
51.6°F
(10.9°C)
0.6°F
(0.3°C)
85th Coolest Coolest since: 1938 1979
39th Warmest Warmest since: 1939 2018
Ties: 1936, 1974, 2011
Sep 1936–Aug 1940
48-Month
52.1°F
(11.2°C)
51.6°F
(10.9°C)
0.5°F
(0.3°C)
84th Coolest Coolest since: 1939 1905
39th Warmest Warmest since: 1939 2019
Ties: 1937, 1939, 1943, 1949, 1954, 1976, 1987, 1999, 2011
Sep 1935–Aug 1940
60-Month
51.8°F
(11.0°C)
51.5°F
(10.8°C)
0.3°F
(0.2°C)
63rd Coolest Coolest since: 1931 1906
59th Warmest Warmest since: 1939 2020
Ties: 1975

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2021, retrieved on January 26, 2021 from https://www.ncdc.noaa.gov/cag/