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 November 2019. For more information, please see Climatological Rankings.


Iowa

Average Temperature Rankings, September 1939

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Warmest/Coolest
Since
Record
September 1939
1-Month
68.2°F
(20.1°C)
63.0°F
(17.2°C)
5.2°F
(2.9°C)
121st Coolest Coolest since: 1938 1896, 1993
5th Warmest Warmest since: 1933 1897, 1931
Ties: 1998, 2019
Aug–Sep 1939
2-Month
69.0°F
(20.6°C)
67.1°F
(19.5°C)
1.9°F
(1.1°C)
101st Coolest Coolest since: 1935 1974, 1992
25th Warmest Warmest since: 1938 1947
Ties: 1897, 1933, 1959
Jul–Sep 1939
3-Month
71.2°F
(21.8°C)
69.4°F
(20.8°C)
1.8°F
(1.0°C)
104th Coolest Coolest since: 1934 1992
22nd Warmest Warmest since: 1938 1936
Ties: 1933
Jun–Sep 1939
4-Month
71.1°F
(21.7°C)
69.3°F
(20.7°C)
1.8°F
(1.0°C)
107th Coolest Coolest since: 1935 1915
19th Warmest Warmest since: 1938 1936
Ties: 1914, 1930
May–Sep 1939
5-Month
70.0°F
(21.1°C)
67.4°F
(19.7°C)
2.6°F
(1.4°C)
119th Coolest Coolest since: 1938 1915
7th Warmest Warmest since: 1936 1936
Ties: 1911
Apr–Sep 1939
6-Month
66.1°F
(18.9°C)
64.2°F
(17.9°C)
1.9°F
(1.0°C)
110th Coolest Coolest since: 1938 1907
16th Warmest Warmest since: 1936 1936
Ties: 1998
Mar–Sep 1939
7-Month
61.7°F
(16.5°C)
60.0°F
(15.6°C)
1.7°F
(0.9°C)
105th Coolest Coolest since: 1937 1951
21st Warmest Warmest since: 1938 2012
Ties: 1901
Feb–Sep 1939
8-Month
56.4°F
(13.6°C)
55.4°F
(13.0°C)
1.0°F
(0.6°C)
94th Coolest Coolest since: 1937 1950
32nd Warmest Warmest since: 1938 2012
Ties: 1986, 2002
Jan–Sep 1939
9-Month
53.1°F
(11.7°C)
51.2°F
(10.7°C)
1.9°F
(1.0°C)
109th Coolest Coolest since: 1937 1912
17th Warmest Warmest since: 1938 2012
Ties: 1925, 1991
Dec 1938–Sep 1939
10-Month
50.2°F
(10.1°C)
48.3°F
(9.1°C)
1.9°F
(1.0°C)
105th Coolest Coolest since: 1937 1979
20th Warmest Warmest since: 1938 2012
Ties: 1941, 1954, 1955, 1976, 1981
Nov 1938–Sep 1939
11-Month
48.9°F
(9.4°C)
47.2°F
(8.4°C)
1.7°F
(1.0°C)
100th Coolest Coolest since: 1938 1912
25th Warmest Warmest since: 1934 2012
Oct 1938–Sep 1939
12-Month
49.7°F
(9.8°C)
47.6°F
(8.7°C)
2.1°F
(1.1°C)
110th Coolest Coolest since: 1938 1912
15th Warmest Warmest since: 1934 2012
Ties: 1976, 1999
Apr 1938–Sep 1939
18-Month
55.0°F
(12.8°C)
53.1°F
(11.7°C)
1.9°F
(1.1°C)
111th Coolest Coolest since: 1938 1951
14th Warmest Warmest since: 1934 2012
Oct 1937–Sep 1939
24-Month
49.2°F
(9.6°C)
47.6°F
(8.7°C)
1.6°F
(0.9°C)
108th Coolest Coolest since: 1938 1979
16th Warmest Warmest since: 1934 2017
Ties: 1934
Oct 1936–Sep 1939
36-Month
48.4°F
(9.1°C)
47.5°F
(8.6°C)
0.9°F
(0.5°C)
95th Coolest Coolest since: 1938 1979
28th Warmest Warmest since: 1935 2000
Ties: 1922, 1931, 1942, 1990, 1992, 2014
Oct 1935–Sep 1939
48-Month
48.0°F
(8.9°C)
47.5°F
(8.6°C)
0.5°F
(0.3°C)
82nd Coolest Coolest since: 1938 1905, 1918
40th Warmest Warmest since: 1937 1934
Ties: 1937, 1987, 2009
Oct 1934–Sep 1939
60-Month
48.1°F
(8.9°C)
47.5°F
(8.6°C)
0.6°F
(0.3°C)
86th Coolest Coolest since: 1938 1906, 1907
35th Warmest Warmest since: 1938 2002
Ties: 1937, 1938, 1956, 1958, 2014, 2015

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published December 2019, retrieved on December 11, 2019 from https://www.ncdc.noaa.gov/cag/