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 September 2020. For more information, please see Climatological Rankings.


Iowa

Precipitation Rankings, May 1940

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
May 1940
1-Month
2.02"
(51.31mm)
4.05"
(102.87mm)
-2.03"
(-51.56mm)
8th Driest Driest since: 1934 1934
119th Wettest Wettest since: 1939 2013
Apr–May 1940
2-Month
5.17"
(131.32mm)
6.99"
(177.55mm)
-1.82"
(-46.23mm)
22nd Driest Driest since: 1939 1934
105th Wettest Wettest since: 1938 2013
Mar–May 1940
3-Month
6.87"
(174.50mm)
8.95"
(227.33mm)
-2.08"
(-52.83mm)
24th Driest Driest since: 1939 1934
103rd Wettest Wettest since: 1938 2013
Feb–May 1940
4-Month
7.98"
(202.69mm)
9.96"
(252.98mm)
-1.98"
(-50.29mm)
20th Driest Driest since: 1939 1934
107th Wettest Wettest since: 1938 2013
Jan–May 1940
5-Month
8.79"
(223.27mm)
10.94"
(277.88mm)
-2.15"
(-54.61mm)
21st Driest Driest since: 1939 1934
106th Wettest Wettest since: 1938 2013
Dec 1939–May 1940
6-Month
9.39"
(238.51mm)
12.04"
(305.82mm)
-2.65"
(-67.31mm)
19th Driest Driest since: 1939 1934
107th Wettest Wettest since: 1938 2013
Nov 1939–May 1940
7-Month
9.88"
(250.95mm)
13.78"
(350.01mm)
-3.90"
(-99.06mm)
10th Driest Driest since: 1934 1934
116th Wettest Wettest since: 1939 2013
Oct 1939–May 1940
8-Month
11.36"
(288.54mm)
16.10"
(408.94mm)
-4.74"
(-120.40mm)
10th Driest Driest since: 1934 1934
116th Wettest Wettest since: 1939 2019
Sep 1939–May 1940
9-Month
12.20"
(309.88mm)
19.79"
(502.67mm)
-7.59"
(-192.79mm)
3rd Driest Driest since: 1934 1934
123rd Wettest Wettest since: 1939 2019
Aug 1939–May 1940
10-Month
16.87"
(428.50mm)
23.65"
(600.71mm)
-6.78"
(-172.21mm)
6th Driest Driest since: 1934 1934
120th Wettest Wettest since: 1939 2019
Jul 1939–May 1940
11-Month
20.07"
(509.78mm)
27.54"
(699.52mm)
-7.47"
(-189.74mm)
6th Driest Driest since: 1934 1934
120th Wettest Wettest since: 1939 2019
Jun 1939–May 1940
12-Month
24.99"
(634.75mm)
32.14"
(816.36mm)
-7.15"
(-181.61mm)
8th Driest Driest since: 1934 1934
118th Wettest Wettest since: 1939 2019
Dec 1938–May 1940
18-Month
33.98"
(863.09mm)
44.20"
(1,122.68mm)
-10.22"
(-259.59mm)
5th Driest Driest since: 1934 1934
120th Wettest Wettest since: 1939 2019
Jun 1938–May 1940
24-Month
56.12"
(1,425.45mm)
64.29"
(1,632.97mm)
-8.17"
(-207.52mm)
17th Driest Driest since: 1935 1957
108th Wettest Wettest since: 1939 2020
Jun 1937–May 1940
36-Month
85.04"
(2,160.02mm)
96.33"
(2,446.78mm)
-11.29"
(-286.76mm)
10th Driest Driest since: 1936 1958
114th Wettest Wettest since: 1939 2011
Jun 1936–May 1940
48-Month
114.78"
(2,915.41mm)
128.31"
(3,259.07mm)
-13.53"
(-343.66mm)
10th Driest Driest since: 1937 1957
113th Wettest Wettest since: 1939 2011
Jun 1935–May 1940
60-Month
145.03"
(3,683.76mm)
160.32"
(4,072.13mm)
-15.29"
(-388.37mm)
10th Driest Driest since: 1938 1958
112th Wettest Wettest since: 1939 2019

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published October 2020, retrieved on October 26, 2020 from https://www.ncdc.noaa.gov/cag/