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 2018

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Top 1/3
  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Wettest/Driest
Since
Record
May 2018
1-Month
4.70"
(119.38mm)
4.05"
(102.87mm)
0.65"
(16.51mm)
83rd Driest Driest since: 2016 1934
43rd Wettest Wettest since: 2017 2013
Apr–May 2018
2-Month
6.24"
(158.50mm)
6.99"
(177.55mm)
-0.75"
(-19.05mm)
47th Driest Driest since: 2000 1934
79th Wettest Wettest since: 2017 2013
Mar–May 2018
3-Month
8.52"
(216.41mm)
8.95"
(227.33mm)
-0.43"
(-10.92mm)
51st Driest Driest since: 2014 1934
75th Wettest Wettest since: 2017 2013
Feb–May 2018
4-Month
10.06"
(255.52mm)
9.96"
(252.98mm)
0.10"
(2.54mm)
66th Driest Driest since: 2014 1934
60th Wettest Wettest since: 2017 2013
Ties: 1946
Jan–May 2018
5-Month
11.08"
(281.43mm)
10.94"
(277.88mm)
0.14"
(3.55mm)
64th Driest Driest since: 2015 1934
62nd Wettest Wettest since: 2017 2013
Ties: 1899
Dec 2017–May 2018
6-Month
11.47"
(291.34mm)
12.04"
(305.82mm)
-0.57"
(-14.48mm)
47th Driest Driest since: 2014 1934
78th Wettest Wettest since: 2017 2013
Nov 2017–May 2018
7-Month
11.88"
(301.75mm)
13.78"
(350.01mm)
-1.90"
(-48.26mm)
30th Driest Driest since: 2003 1934
95th Wettest Wettest since: 2017 2013
Oct 2017–May 2018
8-Month
17.14"
(435.36mm)
16.10"
(408.94mm)
1.04"
(26.42mm)
74th Driest Driest since: 2015 1934
51st Wettest Wettest since: 2017 2019
Sep 2017–May 2018
9-Month
19.45"
(494.03mm)
19.79"
(502.67mm)
-0.34"
(-8.64mm)
57th Driest Driest since: 2014 1934
68th Wettest Wettest since: 2017 2019
Aug 2017–May 2018
10-Month
23.28"
(591.31mm)
23.65"
(600.71mm)
-0.37"
(-9.40mm)
59th Driest Driest since: 2014 1934
66th Wettest Wettest since: 2017 2019
Jul 2017–May 2018
11-Month
26.22"
(665.99mm)
27.54"
(699.52mm)
-1.32"
(-33.53mm)
49th Driest Driest since: 2014 1934
76th Wettest Wettest since: 2017 2019
Jun 2017–May 2018
12-Month
29.72"
(754.89mm)
32.14"
(816.36mm)
-2.42"
(-61.47mm)
38th Driest Driest since: 2014 1934
87th Wettest Wettest since: 2017 2019
Dec 2016–May 2018
18-Month
44.96"
(1,141.98mm)
44.20"
(1,122.68mm)
0.76"
(19.30mm)
63rd Driest Driest since: 2012 1934
61st Wettest Wettest since: 2017 2019
Jun 2016–May 2018
24-Month
70.24"
(1,784.10mm)
64.29"
(1,632.97mm)
5.95"
(151.13mm)
97th Driest Driest since: 2015 1957
27th Wettest Wettest since: 2017 2011
Jun 2015–May 2018
36-Month
113.45"
(2,881.63mm)
96.33"
(2,446.78mm)
17.12"
(434.85mm)
114th Driest Driest since: 2016 1958
9th Wettest Wettest since: 2017 2011
Jun 2014–May 2018
48-Month
152.33"
(3,869.18mm)
128.31"
(3,259.07mm)
24.02"
(610.11mm)
116th Driest Driest since: 2017 1957
6th Wettest Wettest since: 2012 2011
Jun 2013–May 2018
60-Month
177.81"
(4,516.37mm)
160.32"
(4,072.13mm)
17.49"
(444.24mm)
105th Driest Driest since: 2016 1958
16th Wettest Wettest since: 2017 2019

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2019, retrieved on November 12, 2019 from https://www.ncdc.noaa.gov/cag/