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 2020. For more information, please see Climatological Rankings.


Iowa

Precipitation Rankings, May 1901

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
May 1901
1-Month
2.39"
(60.71mm)
4.05"
(102.87mm)
-1.66"
(-42.16mm)
13th Driest Driest since: 1897 1934
114th Wettest Wettest since: 1900 2013
Ties: 1929
Apr–May 1901
2-Month
4.20"
(106.68mm)
6.99"
(177.55mm)
-2.79"
(-70.87mm)
9th Driest Driest to Date 1934
118th Wettest Wettest since: 1900 2013
Mar–May 1901
3-Month
6.74"
(171.20mm)
8.95"
(227.33mm)
-2.21"
(-56.13mm)
22nd Driest Driest since: 1895 1934
105th Wettest Wettest since: 1900 2013
Feb–May 1901
4-Month
7.76"
(197.10mm)
9.96"
(252.98mm)
-2.20"
(-55.88mm)
19th Driest Driest since: 1895 1934
108th Wettest Wettest since: 1900 2013
Jan–May 1901
5-Month
8.47"
(215.14mm)
10.94"
(277.88mm)
-2.47"
(-62.74mm)
18th Driest Driest since: 1895 1934
109th Wettest Wettest since: 1900 2013
Dec 1900–May 1901
6-Month
8.91"
(226.31mm)
12.04"
(305.82mm)
-3.13"
(-79.51mm)
13th Driest Driest to Date 1934
113th Wettest Wettest since: 1900 2013
Nov 1900–May 1901
7-Month
9.97"
(253.24mm)
13.78"
(350.01mm)
-3.81"
(-96.77mm)
11th Driest Driest to Date 1934
115th Wettest Wettest since: 1900 2013
Oct 1900–May 1901
8-Month
13.94"
(354.08mm)
16.10"
(408.94mm)
-2.16"
(-54.86mm)
26th Driest Driest to Date 1934
100th Wettest Wettest since: 1900 2019
Ties: 1907
Sep 1900–May 1901
9-Month
18.96"
(481.58mm)
19.79"
(502.67mm)
-0.83"
(-21.09mm)
53rd Driest Driest since: 1900 1934
73rd Wettest Wettest since: 1899 2019
Aug 1900–May 1901
10-Month
23.69"
(601.73mm)
23.65"
(600.71mm)
0.04"
(1.02mm)
61st Driest Driest since: 1900 1934
65th Wettest Wettest since: 1897 2019
Jul 1900–May 1901
11-Month
30.28"
(769.11mm)
27.54"
(699.52mm)
2.74"
(69.59mm)
85th Driest Driest since: 1900 1934
41st Wettest Wettest since: 1897 2019
Jun 1900–May 1901
12-Month
34.23"
(869.44mm)
32.14"
(816.36mm)
2.09"
(53.08mm)
79th Driest Driest since: 1900 1934
47th Wettest Wettest since: 1897 2019
Dec 1899–May 1901
18-Month
45.50"
(1,155.70mm)
44.20"
(1,122.68mm)
1.30"
(33.02mm)
66th Driest Driest since: 1900 1934
59th Wettest Wettest since: 1897 2019
Jun 1899–May 1901
24-Month
61.29"
(1,556.77mm)
64.29"
(1,632.97mm)
-3.00"
(-76.20mm)
40th Driest Driest since: 1900 1957
85th Wettest Wettest since: 1897 2020
Jun 1898–May 1901
36-Month
90.96"
(2,310.38mm)
96.33"
(2,446.78mm)
-5.37"
(-136.40mm)
35th Driest Driest since: 1900 1958
89th Wettest Wettest since: 1898 2011
Jun 1897–May 1901
48-Month
116.82"
(2,967.23mm)
128.31"
(3,259.07mm)
-11.49"
(-291.84mm)
13th Driest Driest to Date 1957
110th Wettest Wettest since: 1900 2011
Jun 1896–May 1901
60-Month
151.79"
(3,855.47mm)
160.32"
(4,072.13mm)
-8.53"
(-216.66mm)
20th Driest Driest since: 1900 1958
102nd Wettest Wettest to Date 2019

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2020, retrieved on December 1, 2020 from https://www.ncdc.noaa.gov/cag/