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


Iowa

Precipitation Rankings, September 2018

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
September 2018
1-Month
8.10"
(205.74mm)
3.67"
(93.22mm)
4.43"
(112.52mm)
123rd Driest Driest since: 2017 1939
3rd Wettest Wettest since: 1965 1965
Aug–Sep 2018
2-Month
14.52"
(368.81mm)
7.51"
(190.75mm)
7.01"
(178.06mm)
125th Driest Driest since: 2017 1976
1st Wettest Wettest to Date 2018
Jul–Sep 2018
3-Month
17.91"
(454.91mm)
11.36"
(288.54mm)
6.55"
(166.37mm)
121st Driest Driest since: 2017 2013
5th Wettest Wettest since: 2016 1993
Jun–Sep 2018
4-Month
25.46"
(646.68mm)
16.00"
(406.40mm)
9.46"
(240.28mm)
122nd Driest Driest since: 2017 2012
4th Wettest Wettest since: 2010 1993
May–Sep 2018
5-Month
30.16"
(766.06mm)
20.04"
(509.02mm)
10.12"
(257.04mm)
122nd Driest Driest since: 2017 1976
4th Wettest Wettest since: 2010 1993
Apr–Sep 2018
6-Month
31.70"
(805.18mm)
22.99"
(583.95mm)
8.71"
(221.23mm)
121st Driest Driest since: 2017 1988
5th Wettest Wettest since: 2010 1993
Mar–Sep 2018
7-Month
33.98"
(863.09mm)
24.94"
(633.48mm)
9.04"
(229.61mm)
122nd Driest Driest since: 2017 1988
4th Wettest Wettest since: 2010 1993
Feb–Sep 2018
8-Month
35.52"
(902.21mm)
25.96"
(659.38mm)
9.56"
(242.83mm)
121st Driest Driest since: 2017 1988
5th Wettest Wettest since: 2010 1993
Jan–Sep 2018
9-Month
36.54"
(928.12mm)
26.93"
(684.02mm)
9.61"
(244.10mm)
122nd Driest Driest since: 2017 1988
4th Wettest Wettest since: 2010 1993
Dec 2017–Sep 2018
10-Month
36.93"
(938.02mm)
28.04"
(712.22mm)
8.89"
(225.80mm)
116th Driest Driest since: 2017 1988
9th Wettest Wettest since: 2016 1993
Nov 2017–Sep 2018
11-Month
37.34"
(948.44mm)
29.78"
(756.41mm)
7.56"
(192.03mm)
113th Driest Driest since: 2017 1934
12th Wettest Wettest since: 2016 1993
Oct 2017–Sep 2018
12-Month
42.60"
(1,082.04mm)
32.09"
(815.09mm)
10.51"
(266.95mm)
118th Driest Driest since: 2017 1934
7th Wettest Wettest since: 2016 1993
Apr 2017–Sep 2018
18-Month
63.78"
(1,620.01mm)
55.13"
(1,400.30mm)
8.65"
(219.71mm)
109th Driest Driest since: 2017 1934
16th Wettest Wettest since: 2016 1993
Oct 2016–Sep 2018
24-Month
73.82"
(1,875.03mm)
64.26"
(1,632.20mm)
9.56"
(242.83mm)
106th Driest Driest since: 2014 1956
18th Wettest Wettest since: 2017 1993
Oct 2015–Sep 2018
36-Month
117.55"
(2,985.77mm)
96.36"
(2,447.54mm)
21.19"
(538.23mm)
118th Driest Driest since: 2017 1957
5th Wettest Wettest since: 2016 2010
Oct 2014–Sep 2018
48-Month
154.56"
(3,925.82mm)
128.36"
(3,260.34mm)
26.20"
(665.48mm)
117th Driest Driest since: 2017 1958
5th Wettest Wettest since: 2011 2010
Oct 2013–Sep 2018
60-Month
193.21"
(4,907.53mm)
160.34"
(4,072.64mm)
32.87"
(834.89mm)
117th Driest Driest since: 2017 1957
4th Wettest Wettest since: 2011 2010

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published January 2020, retrieved on January 27, 2020 from https://www.ncdc.noaa.gov/cag/