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, September 1949

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 1949
1-Month 		3.20"
(81.28mm)		 3.67"
(93.22mm)		 -0.47"
(-11.94mm)		 64th Driest
Driest since:
 1939
65th Wettest
Wettest since:
 1965
Aug–Sep 1949
2-Month 		5.49"
(139.45mm)		 7.51"
(190.75mm)		 -2.02"
(-51.30mm)		 26th Driest
Driest since:
 1976
103rd Wettest
Wettest since:
 2018
Jul–Sep 1949
3-Month 		9.05"
(229.87mm)		 11.36"
(288.54mm)		 -2.31"
(-58.67mm)		 33rd Driest
Driest since:
 2013
96th Wettest
Wettest since:
 1993
Jun–Sep 1949
4-Month 		14.60"
(370.84mm)		 16.00"
(406.40mm)		 -1.40"
(-35.56mm)		 47th Driest
Driest since:
 2012
82nd Wettest
Wettest since:
 1993
May–Sep 1949
5-Month 		17.27"
(438.66mm)		 20.04"
(509.02mm)		 -2.77"
(-70.36mm)		 28th Driest
Driest since:
 1976
101st Wettest
Wettest since:
 1993
Apr–Sep 1949
6-Month 		18.58"
(471.93mm)		 22.99"
(583.95mm)		 -4.41"
(-112.02mm)		 17th Driest
Driest since:
 1988
112th Wettest
Wettest since:
 1993
Mar–Sep 1949
7-Month 		21.06"
(534.92mm)		 24.94"
(633.48mm)		 -3.88"
(-98.56mm)		 22nd Driest
Driest since:
 1988
107th Wettest
Wettest since:
 1993
Feb–Sep 1949
8-Month 		21.95"
(557.53mm)		 25.96"
(659.38mm)		 -4.01"
(-101.85mm)		 23rd Driest
Driest since:
 1988
106th Wettest
Wettest since:
 1993
Jan–Sep 1949
9-Month 		24.65"
(626.11mm)		 26.93"
(684.02mm)		 -2.28"
(-57.91mm)		 41st Driest
Driest since:
 1988
88th Wettest
Wettest since:
 1993
Dec 1948–Sep 1949
10-Month 		26.33"
(668.78mm)		 28.04"
(712.22mm)		 -1.71"
(-43.44mm)		 47th Driest
Driest since:
 1988
81st Wettest
Wettest since:
 1993
Nov 1948–Sep 1949
11-Month 		29.05"
(737.87mm)		 29.78"
(756.41mm)		 -0.73"
(-18.54mm)		 56th Driest
Driest since:
 1934
72nd Wettest
Wettest since:
 1993
Oct 1948–Sep 1949
12-Month 		30.97"
(786.64mm)		 32.09"
(815.09mm)		 -1.12"
(-28.45mm)		 52nd Driest
Driest since:
 1934
76th Wettest
Wettest since:
 1993
Apr 1948–Sep 1949
18-Month 		48.41"
(1,229.61mm)		 55.13"
(1,400.30mm)		 -6.72"
(-170.69mm)		 17th Driest
Driest since:
 1934
111th Wettest
Wettest since:
 1993
Oct 1947–Sep 1949
24-Month 		60.24"
(1,530.10mm)		 64.26"
(1,632.20mm)		 -4.02"
(-102.10mm)		 36th Driest
Driest since:
 1956
91st Wettest
Wettest since:
 1993
Oct 1946–Sep 1949
36-Month 		93.27"
(2,369.06mm)		 96.36"
(2,447.54mm)		 -3.09"
(-78.48mm)		 44th Driest
Driest since:
 1957
82nd Wettest
Wettest since:
 2010
Oct 1945–Sep 1949
48-Month 		126.05"
(3,201.67mm)		 128.36"
(3,260.34mm)		 -2.31"
(-58.67mm)		 47th Driest
Driest since:
 1958
78th Wettest
Wettest since:
 2010
Oct 1944–Sep 1949
60-Month 		160.60"
(4,079.24mm)		 160.34"
(4,072.64mm)		 0.26"
(6.60mm)		 63rd Driest
Driest since:
 1957
61st Wettest
Wettest since:
 2010

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