Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Iowa

Precipitation Rankings, October 1931

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
October 1931
1-Month 		2.97"
(75.44mm)		 2.29"
(58.17mm)		 0.68"
(17.27mm)		 84th Driest
Driest since:
 1952
45th Wettest
Wettest since:
 2009
Sep–Oct 1931
2-Month 		9.71"
(246.63mm)		 5.96"
(151.38mm)		 3.75"
(95.25mm)		 119th Driest
Driest since:
 1952
10th Wettest
Wettest since:
 1941
Aug–Oct 1931
3-Month 		12.85"
(326.39mm)		 9.80"
(248.92mm)		 3.05"
(77.47mm)		 106th Driest
Driest since:
 1953
23rd Wettest
Wettest since:
 2018
Jul–Oct 1931
4-Month 		15.46"
(392.68mm)		 13.66"
(346.96mm)		 1.80"
(45.72mm)		 93rd Driest
Driest since:
 1953, 1976
36th Wettest
Wettest since:
 1993
Jun–Oct 1931
5-Month 		18.91"
(480.31mm)		 18.29"
(464.57mm)		 0.62"
(15.74mm)		 76th Driest
Driest since:
 1976
53rd Wettest
Wettest since:
 1993
May–Oct 1931
6-Month 		21.82"
(554.23mm)		 22.33"
(567.18mm)		 -0.51"
(-12.95mm)		 58th Driest
Driest since:
 1976
71st Wettest
Wettest since:
 1993
Apr–Oct 1931
7-Month 		24.09"
(611.89mm)		 25.28"
(642.11mm)		 -1.19"
(-30.22mm)		 53rd Driest
Driest since:
 1988
76th Wettest
Wettest since:
 1993
Mar–Oct 1931
8-Month 		25.72"
(653.29mm)		 27.23"
(691.64mm)		 -1.51"
(-38.35mm)		 48th Driest
Driest since:
 1988
81st Wettest
Wettest since:
 1993
Feb–Oct 1931
9-Month 		25.95"
(659.13mm)		 28.25"
(717.55mm)		 -2.30"
(-58.42mm)		 39th Driest
Driest since:
 1988
90th Wettest
Wettest since:
 1993
Ties: 1917
Jan–Oct 1931
10-Month 		26.45"
(671.83mm)		 29.23"
(742.44mm)		 -2.78"
(-70.61mm)		 35th Driest
Driest since:
 1988
94th Wettest
Wettest since:
 1993
Dec 1930–Oct 1931
11-Month 		27.00"
(685.80mm)		 30.33"
(770.38mm)		 -3.33"
(-84.58mm)		 31st Driest
Driest since:
 1988
97th Wettest
Wettest since:
 1993
Nov 1930–Oct 1931
12-Month 		29.15"
(740.41mm)		 32.07"
(814.58mm)		 -2.92"
(-74.17mm)		 36th Driest
Driest since:
 1956
92nd Wettest
Wettest since:
 1993
May 1930–Oct 1931
18-Month 		46.96"
(1,192.78mm)		 54.47"
(1,383.54mm)		 -7.51"
(-190.76mm)		 12th Driest
Driest since:
 1956
116th Wettest
Wettest since:
 2019
Nov 1929–Oct 1931
24-Month 		54.12"
(1,374.65mm)		 64.23"
(1,631.44mm)		 -10.11"
(-256.79mm)		 6th Driest
Driest to Date
 1956
121st Wettest
Wettest since:
 1993
Nov 1928–Oct 1931
36-Month 		86.63"
(2,200.40mm)		 96.34"
(2,447.04mm)		 -9.71"
(-246.64mm)		 13th Driest
Driest since:
 1957
113th Wettest
Wettest since:
 2010
Nov 1927–Oct 1931
48-Month 		119.44"
(3,033.78mm)		 128.36"
(3,260.34mm)		 -8.92"
(-226.56mm)		 16th Driest
Driest since:
 1958
109th Wettest
Wettest since:
 2010
Nov 1926–Oct 1931
60-Month 		149.92"
(3,807.97mm)		 160.34"
(4,072.64mm)		 -10.42"
(-264.67mm)		 15th Driest
Driest since:
 1956
109th Wettest
Wettest since:
 2010

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