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 July 2022. For more information, please see Climatological Rankings.


Iowa

Precipitation Rankings, September 1939

View Period (Months):All1234567891011121824364860
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
September 1939
1-Month
0.84"
(21.34mm)
3.67"
(93.22mm)
-2.83"
(-71.88mm)
1st Driest Driest to Date 1939
127th Wettest Wettest since: 1938 1965
Aug–Sep 1939
2-Month
5.51"
(139.95mm)
7.51"
(190.75mm)
-2.00"
(-50.80mm)
26th Driest Driest since: 1930 1976
102nd Wettest Wettest since: 1938 2018
Jul–Sep 1939
3-Month
8.71"
(221.23mm)
11.36"
(288.54mm)
-2.65"
(-67.31mm)
26th Driest Driest since: 1937 2013
102nd Wettest Wettest since: 1938 1993
Jun–Sep 1939
4-Month
13.63"
(346.20mm)
16.00"
(406.40mm)
-2.37"
(-60.20mm)
32nd Driest Driest since: 1937 2012
96th Wettest Wettest since: 1938 1993
May–Sep 1939
5-Month
15.67"
(398.02mm)
20.04"
(509.02mm)
-4.37"
(-111.00mm)
11th Driest Driest since: 1910 1976
117th Wettest Wettest since: 1938 1993
Apr–Sep 1939
6-Month
17.67"
(448.82mm)
22.99"
(583.95mm)
-5.32"
(-135.13mm)
12th Driest Driest since: 1934 1988
116th Wettest Wettest since: 1938 1993
Mar–Sep 1939
7-Month
19.30"
(490.22mm)
24.94"
(633.48mm)
-5.64"
(-143.26mm)
9th Driest Driest since: 1936 1988
119th Wettest Wettest since: 1938 1993
Feb–Sep 1939
8-Month
21.07"
(535.18mm)
25.96"
(659.38mm)
-4.89"
(-124.20mm)
12th Driest Driest since: 1936 1988
116th Wettest Wettest since: 1938 1993
Jan–Sep 1939
9-Month
21.93"
(557.02mm)
26.93"
(684.02mm)
-5.00"
(-127.00mm)
13th Driest Driest since: 1936 1988
115th Wettest Wettest since: 1938 1993
Dec 1938–Sep 1939
10-Month
22.62"
(574.55mm)
28.04"
(712.22mm)
-5.42"
(-137.67mm)
11th Driest Driest since: 1934 1988
116th Wettest Wettest since: 1938 1993
Nov 1938–Sep 1939
11-Month
25.32"
(643.13mm)
29.78"
(756.41mm)
-4.46"
(-113.28mm)
15th Driest Driest since: 1934 1934
112th Wettest Wettest since: 1938 1993
Oct 1938–Sep 1939
12-Month
26.17"
(664.72mm)
32.09"
(815.09mm)
-5.92"
(-150.37mm)
9th Driest Driest since: 1934 1934
118th Wettest Wettest since: 1938 1993
Ties: 1901
Apr 1938–Sep 1939
18-Month
53.87"
(1,368.30mm)
55.13"
(1,400.30mm)
-1.26"
(-32.00mm)
53rd Driest Driest since: 1937 1934
74th Wettest Wettest since: 1938 1993
Oct 1937–Sep 1939
24-Month
61.79"
(1,569.47mm)
64.26"
(1,632.20mm)
-2.47"
(-62.73mm)
49th Driest Driest since: 1937 1956
77th Wettest Wettest since: 1938 1993
Oct 1936–Sep 1939
36-Month
89.52"
(2,273.81mm)
96.36"
(2,447.54mm)
-6.84"
(-173.73mm)
23rd Driest Driest since: 1937 1957
102nd Wettest Wettest since: 1938 2010
Oct 1935–Sep 1939
48-Month
117.59"
(2,986.79mm)
128.36"
(3,260.34mm)
-10.77"
(-273.55mm)
12th Driest Driest since: 1937 1958
112th Wettest Wettest since: 1938 2010
Oct 1934–Sep 1939
60-Month
150.85"
(3,831.59mm)
160.34"
(4,072.64mm)
-9.49"
(-241.05mm)
20th Driest Driest since: 1938 1957
103rd Wettest Wettest since: 1933 2010

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published August 2022, retrieved on August 16, 2022 from https://www.ncei.noaa.gov/cag/