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


Illinois

Average Temperature Rankings, September 1977

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
September 1977
1-Month
67.4°F
(19.7°C)
66.2°F
(19.0°C)
1.2°F
(0.7°C)
77th Coolest Coolest since: 1976 1918
51st Warmest Warmest since: 1973 1925, 1933
Aug–Sep 1977
2-Month
69.6°F
(20.9°C)
69.8°F
(21.0°C)
-0.2°F
(-0.1°C)
58th Coolest Coolest since: 1976 1967
70th Warmest Warmest since: 1973 1936
Ties: 1945, 1968, 2017
Jul–Sep 1977
3-Month
72.3°F
(22.4°C)
71.8°F
(22.1°C)
0.5°F
(0.3°C)
78th Coolest Coolest since: 1976 1967
50th Warmest Warmest since: 1973 1936
Ties: 1898, 1948
Jun–Sep 1977
4-Month
71.9°F
(22.2°C)
71.7°F
(22.1°C)
0.2°F
(0.1°C)
70th Coolest Coolest since: 1976 1915, 1924
58th Warmest Warmest since: 1973 1936
Ties: 1999
May–Sep 1977
5-Month
71.3°F
(21.8°C)
69.8°F
(21.0°C)
1.5°F
(0.8°C)
102nd Coolest Coolest since: 1976 1924
26th Warmest Warmest since: 1959 1936
Ties: 1930
Apr–Sep 1977
6-Month
69.0°F
(20.6°C)
66.7°F
(19.3°C)
2.3°F
(1.3°C)
119th Coolest Coolest since: 1976 1907
9th Warmest Warmest since: 1955 2010
Ties: 1933, 1987, 2005
Mar–Sep 1977
7-Month
65.7°F
(18.7°C)
62.9°F
(17.2°C)
2.8°F
(1.5°C)
122nd Coolest Coolest since: 1976 1924
6th Warmest Warmest since: 1936 2012
Ties: 2007
Feb–Sep 1977
8-Month
61.0°F
(16.1°C)
58.6°F
(14.8°C)
2.4°F
(1.3°C)
116th Coolest Coolest since: 1976 1904
12th Warmest Warmest since: 1954 2012
Ties: 1925, 1930
Jan–Sep 1977
9-Month
55.4°F
(13.0°C)
55.0°F
(12.8°C)
0.4°F
(0.2°C)
75th Coolest Coolest since: 1975 1904, 1912
53rd Warmest Warmest since: 1976 2012
Ties: 1913, 2004
Dec 1976–Sep 1977
10-Month
52.2°F
(11.2°C)
52.4°F
(11.3°C)
-0.2°F
(-0.1°C)
53rd Coolest Coolest since: 1975 1904
74th Warmest Warmest since: 1976 2012
Ties: 1900, 1927, 1936
Nov 1976–Sep 1977
11-Month
50.5°F
(10.3°C)
51.4°F
(10.8°C)
-0.9°F
(-0.5°C)
28th Coolest Coolest since: 1970 1904
99th Warmest Warmest since: 1976 2012
Ties: 1969
Oct 1976–Sep 1977
12-Month
50.3°F
(10.2°C)
51.6°F
(10.9°C)
-1.3°F
(-0.7°C)
16th Coolest Coolest since: 1960 1904
111th Warmest Warmest since: 1976 2012
Ties: 1905, 1958, 1960, 1984
Apr 1976–Sep 1977
18-Month
55.4°F
(13.0°C)
56.7°F
(13.7°C)
-1.3°F
(-0.7°C)
11th Coolest Coolest since: 1951 1904, 1918
116th Warmest Warmest since: 1976 2012
Ties: 1982
Oct 1975–Sep 1977
24-Month
51.6°F
(10.9°C)
51.7°F
(10.9°C)
-0.1°F
(0.0°C)
51st Coolest Coolest since: 1975 1979
75th Warmest Warmest since: 1976 2017
Ties: 1945, 1946, 1964, 1975, 1983, 1990, 1996
Oct 1974–Sep 1977
36-Month
51.5°F
(10.8°C)
51.6°F
(10.9°C)
-0.1°F
(-0.1°C)
50th Coolest Coolest since: 1972 1979
75th Warmest Warmest since: 1976 2018
Ties: 1910, 1925, 1945, 1986
Oct 1973–Sep 1977
48-Month
51.6°F
(10.9°C)
51.6°F
(10.9°C)
0.0°F
(0.0°C)
52nd Coolest Coolest since: 1973 1905
72nd Warmest Warmest since: 1976 2019
Ties: 1914, 1946
Oct 1972–Sep 1977
60-Month
51.6°F
(10.9°C)
51.5°F
(10.8°C)
0.1°F
(0.1°C)
55th Coolest Coolest since: 1974 1906
68th Warmest Warmest since: 1976 2020
Ties: 1986

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published October 2021, retrieved on October 19, 2021 from https://www.ncdc.noaa.gov/cag/