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


Iowa

Precipitation Rankings, May 1921

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Wettest/Driest
Since
Record
May 1921
1-Month
4.30"
(109.22mm)
4.05"
(102.87mm)
0.25"
(6.35mm)
72nd Driest Driest since: 1920 1934
54th Wettest Wettest since: 1918 2013
Ties: 1998
Apr–May 1921
2-Month
7.67"
(194.82mm)
6.99"
(177.55mm)
0.68"
(17.27mm)
74th Driest Driest since: 1916 1934
52nd Wettest Wettest since: 1920 2013
Mar–May 1921
3-Month
9.26"
(235.20mm)
8.95"
(227.33mm)
0.31"
(7.87mm)
70th Driest Driest since: 1916 1934
56th Wettest Wettest since: 1920 2013
Ties: 1975
Feb–May 1921
4-Month
10.01"
(254.25mm)
9.96"
(252.98mm)
0.05"
(1.27mm)
63rd Driest Driest since: 1916 1934
63rd Wettest Wettest since: 1920 2013
Jan–May 1921
5-Month
10.49"
(266.45mm)
10.94"
(277.88mm)
-0.45"
(-11.43mm)
52nd Driest Driest since: 1914 1934
74th Wettest Wettest since: 1920 2013
Dec 1920–May 1921
6-Month
11.67"
(296.42mm)
12.04"
(305.82mm)
-0.37"
(-9.40mm)
54th Driest Driest since: 1914 1934
71st Wettest Wettest since: 1920 2013
Nov 1920–May 1921
7-Month
13.89"
(352.81mm)
13.78"
(350.01mm)
0.11"
(2.80mm)
59th Driest Driest since: 1918 1934
66th Wettest Wettest since: 1920 2013
Oct 1920–May 1921
8-Month
16.00"
(406.40mm)
16.10"
(408.94mm)
-0.10"
(-2.54mm)
56th Driest Driest since: 1918 1934
69th Wettest Wettest since: 1920 2019
Sep 1920–May 1921
9-Month
19.23"
(488.44mm)
19.79"
(502.67mm)
-0.56"
(-14.23mm)
56th Driest Driest since: 1918 1934
69th Wettest Wettest since: 1920 2019
Aug 1920–May 1921
10-Month
22.63"
(574.80mm)
23.65"
(600.71mm)
-1.02"
(-25.91mm)
49th Driest Driest since: 1918 1934
76th Wettest Wettest since: 1920 2019
Jul 1920–May 1921
11-Month
26.60"
(675.64mm)
27.54"
(699.52mm)
-0.94"
(-23.88mm)
56th Driest Driest since: 1918 1934
69th Wettest Wettest since: 1920 2019
Jun 1920–May 1921
12-Month
29.95"
(760.73mm)
32.14"
(816.36mm)
-2.19"
(-55.63mm)
43rd Driest Driest since: 1918 1934
82nd Wettest Wettest since: 1920 2019
Dec 1919–May 1921
18-Month
42.12"
(1,069.85mm)
44.20"
(1,122.68mm)
-2.08"
(-52.83mm)
43rd Driest Driest since: 1918 1934
81st Wettest Wettest since: 1920 2019
Jun 1919–May 1921
24-Month
65.22"
(1,656.59mm)
64.29"
(1,632.97mm)
0.93"
(23.62mm)
66th Driest Driest since: 1919 1957
58th Wettest Wettest since: 1920 2011
Jun 1918–May 1921
36-Month
98.75"
(2,508.25mm)
96.33"
(2,446.78mm)
2.42"
(61.47mm)
73rd Driest Driest since: 1920 1958
50th Wettest Wettest since: 1917 2011
Jun 1917–May 1921
48-Month
126.81"
(3,220.97mm)
128.31"
(3,259.07mm)
-1.50"
(-38.10mm)
55th Driest Driest since: 1920 1957
67th Wettest Wettest since: 1918 2011
Jun 1916–May 1921
60-Month
154.80"
(3,931.92mm)
160.32"
(4,072.13mm)
-5.52"
(-140.21mm)
34th Driest Driest since: 1915 1958
87th Wettest Wettest since: 1920 2019

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2019, retrieved on December 6, 2019 from https://www.ncdc.noaa.gov/cag/