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 1950

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1950
1-Month
64.5°F
(18.1°C)
66.2°F
(19.0°C)
-1.7°F
(-0.9°C)
31st Coolest Coolest since: 1949 1918
96th Warmest Warmest since: 1948 1925, 1933
Ties: 1981
Aug–Sep 1950
2-Month
66.8°F
(19.3°C)
69.8°F
(21.0°C)
-3.0°F
(-1.7°C)
5th Coolest Coolest since: 1902 1967
122nd Warmest Warmest since: 1949 1936
Jul–Sep 1950
3-Month
68.6°F
(20.3°C)
71.8°F
(22.1°C)
-3.2°F
(-1.8°C)
3rd Coolest Coolest since: 1924 1967
124th Warmest Warmest since: 1949 1936
Ties: 1992
Jun–Sep 1950
4-Month
69.0°F
(20.6°C)
71.7°F
(22.1°C)
-2.7°F
(-1.5°C)
5th Coolest Coolest since: 1924 1915, 1924
122nd Warmest Warmest since: 1949 1936
Ties: 1902
May–Sep 1950
5-Month
67.9°F
(19.9°C)
69.8°F
(21.0°C)
-1.9°F
(-1.1°C)
12th Coolest Coolest since: 1945 1924
115th Warmest Warmest since: 1949 1936
Ties: 1929
Apr–Sep 1950
6-Month
64.2°F
(17.9°C)
66.7°F
(19.3°C)
-2.5°F
(-1.4°C)
5th Coolest Coolest since: 1924 1907
122nd Warmest Warmest since: 1949 2010
Mar–Sep 1950
7-Month
60.2°F
(15.7°C)
62.9°F
(17.2°C)
-2.7°F
(-1.5°C)
2nd Coolest Coolest since: 1924 1924
125th Warmest Warmest since: 1949 2012
Feb–Sep 1950
8-Month
56.3°F
(13.5°C)
58.6°F
(14.8°C)
-2.3°F
(-1.3°C)
4th Coolest Coolest since: 1924 1904
123rd Warmest Warmest since: 1949 2012
Ties: 1912
Jan–Sep 1950
9-Month
53.6°F
(12.0°C)
54.9°F
(12.7°C)
-1.3°F
(-0.7°C)
22nd Coolest Coolest since: 1940 1904, 1912
105th Warmest Warmest since: 1949 2012
Ties: 1915, 1963
Dec 1949–Sep 1950
10-Month
51.7°F
(10.9°C)
52.4°F
(11.3°C)
-0.7°F
(-0.4°C)
34th Coolest Coolest since: 1945 1904
92nd Warmest Warmest since: 1949 2012
Ties: 1960, 1994, 1997
Nov 1949–Sep 1950
11-Month
50.8°F
(10.4°C)
51.3°F
(10.7°C)
-0.5°F
(-0.3°C)
36th Coolest Coolest since: 1945 1904
90th Warmest Warmest since: 1949 2012
Ties: 1945, 1968, 1993, 2003, 2009, 2015
Oct 1949–Sep 1950
12-Month
51.4°F
(10.8°C)
51.7°F
(10.9°C)
-0.3°F
(-0.1°C)
51st Coolest Coolest since: 1945 1904
75th Warmest Warmest since: 1949 2012
Ties: 1906, 1943, 1966
Apr 1949–Sep 1950
18-Month
56.5°F
(13.6°C)
56.7°F
(13.7°C)
-0.2°F
(-0.1°C)
48th Coolest Coolest since: 1947 1904, 1918
78th Warmest Warmest since: 1949 2012
Ties: 1906, 1947, 1959, 2001
Oct 1948–Sep 1950
24-Month
51.8°F
(11.0°C)
51.6°F
(10.9°C)
0.2°F
(0.1°C)
73rd Coolest Coolest since: 1948 1979
52nd Warmest Warmest since: 1949 2017
Ties: 1898, 1941, 1948, 1965, 1972, 1989, 2004
Oct 1947–Sep 1950
36-Month
51.8°F
(11.0°C)
51.6°F
(10.9°C)
0.2°F
(0.1°C)
70th Coolest Coolest since: 1947 1979
54th Warmest Warmest since: 1949 2018
Ties: 1938, 1973
Oct 1946–Sep 1950
48-Month
51.8°F
(11.0°C)
51.6°F
(10.9°C)
0.2°F
(0.1°C)
66th Coolest Coolest since: 1948 1905
57th Warmest Warmest since: 1949 2019
Ties: 1916, 1925, 1931, 1945, 1958, 1974
Oct 1945–Sep 1950
60-Month
51.9°F
(11.1°C)
51.6°F
(10.9°C)
0.3°F
(0.2°C)
69th Coolest Coolest since: 1949 1906
53rd Warmest Warmest since: 1946 2020
Ties: 1944, 1946, 1959

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/