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 1940

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
September 1940
1-Month
0.87"
(22.10mm)
3.67"
(93.22mm)
-2.80"
(-71.12mm)
3rd Driest Driest since: 1939 1939
125th Wettest Wettest since: 1938 1965
Aug–Sep 1940
2-Month
7.29"
(185.17mm)
7.51"
(190.75mm)
-0.22"
(-5.58mm)
64th Driest Driest since: 1939 1976
64th Wettest Wettest since: 1938 2018
Jul–Sep 1940
3-Month
11.86"
(301.24mm)
11.36"
(288.54mm)
0.50"
(12.70mm)
78th Driest Driest since: 1939 2013
50th Wettest Wettest since: 1938 1993
Jun–Sep 1940
4-Month
15.53"
(394.46mm)
16.00"
(406.40mm)
-0.47"
(-11.94mm)
64th Driest Driest since: 1939 2012
64th Wettest Wettest since: 1938 1993
May–Sep 1940
5-Month
17.55"
(445.77mm)
20.04"
(509.02mm)
-2.49"
(-63.25mm)
33rd Driest Driest since: 1939 1976
95th Wettest Wettest since: 1938 1993
Apr–Sep 1940
6-Month
20.70"
(525.78mm)
22.99"
(583.95mm)
-2.29"
(-58.17mm)
34th Driest Driest since: 1939 1988
94th Wettest Wettest since: 1938 1993
Mar–Sep 1940
7-Month
22.40"
(568.96mm)
24.94"
(633.48mm)
-2.54"
(-64.52mm)
36th Driest Driest since: 1939 1988
92nd Wettest Wettest since: 1938 1993
Feb–Sep 1940
8-Month
23.51"
(597.15mm)
25.96"
(659.38mm)
-2.45"
(-62.23mm)
37th Driest Driest since: 1939 1988
91st Wettest Wettest since: 1938 1993
Ties: 1904
Jan–Sep 1940
9-Month
24.32"
(617.73mm)
26.93"
(684.02mm)
-2.61"
(-66.29mm)
37th Driest Driest since: 1939 1988
91st Wettest Wettest since: 1938 1993
Dec 1939–Sep 1940
10-Month
24.92"
(632.97mm)
28.04"
(712.22mm)
-3.12"
(-79.25mm)
29th Driest Driest since: 1939 1988
98th Wettest Wettest since: 1938 1993
Ties: 1922
Nov 1939–Sep 1940
11-Month
25.41"
(645.41mm)
29.78"
(756.41mm)
-4.37"
(-111.00mm)
17th Driest Driest since: 1939 1934
110th Wettest Wettest since: 1938 1993
Oct 1939–Sep 1940
12-Month
26.89"
(683.01mm)
32.09"
(815.09mm)
-5.20"
(-132.08mm)
17th Driest Driest since: 1939 1934
110th Wettest Wettest since: 1938 1993
Apr 1939–Sep 1940
18-Month
44.56"
(1,131.82mm)
55.13"
(1,400.30mm)
-10.57"
(-268.48mm)
5th Driest Driest since: 1934 1934
122nd Wettest Wettest since: 1939 1993
Oct 1938–Sep 1940
24-Month
53.06"
(1,347.72mm)
64.26"
(1,632.20mm)
-11.20"
(-284.48mm)
5th Driest Driest since: 1934 1956
121st Wettest Wettest since: 1939 1993
Oct 1937–Sep 1940
36-Month
88.68"
(2,252.47mm)
96.36"
(2,447.54mm)
-7.68"
(-195.07mm)
18th Driest Driest since: 1936 1957
107th Wettest Wettest since: 1939 2010
Oct 1936–Sep 1940
48-Month
116.41"
(2,956.81mm)
128.36"
(3,260.34mm)
-11.95"
(-303.53mm)
10th Driest Driest since: 1937 1958
114th Wettest Wettest since: 1939 2010
Oct 1935–Sep 1940
60-Month
144.48"
(3,669.79mm)
160.34"
(4,072.64mm)
-15.86"
(-402.85mm)
7th Driest Driest since: 1937 1957
116th Wettest Wettest since: 1939 2010

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published August 2022, retrieved on August 18, 2022 from https://www.ncei.noaa.gov/cag/