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, July 2010

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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
July 2010
1-Month 		7.89"
(200.41mm)		 3.86"
(98.04mm)		 4.03"
(102.37mm)		 124th Driest
Driest since:
 1936
5th Wettest
Wettest since:
 1993
Jun–Jul 2010
2-Month 		18.17"
(461.52mm)		 8.49"
(215.65mm)		 9.68"
(245.87mm)		 127th Driest
Driest since:
 1936
2nd Wettest
Wettest since:
 1993
May–Jul 2010
3-Month 		22.36"
(567.94mm)		 12.53"
(318.26mm)		 9.83"
(249.68mm)		 127th Driest
Driest since:
 1988
2nd Wettest
Wettest since:
 1993
Apr–Jul 2010
4-Month 		26.06"
(661.92mm)		 15.48"
(393.19mm)		 10.58"
(268.73mm)		 126th Driest
Driest since:
 1936
3rd Wettest
Wettest since:
 1993
Mar–Jul 2010
5-Month 		27.78"
(705.61mm)		 17.43"
(442.72mm)		 10.35"
(262.89mm)		 127th Driest
Driest since:
 1936
2nd Wettest
Wettest since:
 1993
Feb–Jul 2010
6-Month 		28.74"
(730.00mm)		 18.45"
(468.63mm)		 10.29"
(261.37mm)		 126th Driest
Driest since:
 1988
3rd Wettest
Wettest since:
 1993
Jan–Jul 2010
7-Month 		30.04"
(763.02mm)		 19.43"
(493.52mm)		 10.61"
(269.50mm)		 127th Driest
Driest since:
 1988
2nd Wettest
Wettest since:
 1993
Dec 2009–Jul 2010
8-Month 		32.58"
(827.53mm)		 20.53"
(521.46mm)		 12.05"
(306.07mm)		 126th Driest
Driest since:
 1988
2nd Wettest
Wettest since:
 1993
Nov 2009–Jul 2010
9-Month 		33.77"
(857.76mm)		 22.27"
(565.66mm)		 11.50"
(292.10mm)		 126th Driest
Driest since:
 1934
2nd Wettest
Wettest since:
 1993
Oct 2009–Jul 2010
10-Month 		40.12"
(1,019.05mm)		 24.58"
(624.33mm)		 15.54"
(394.72mm)		 126th Driest
Driest since:
 1934
2nd Wettest
Wettest since:
 1993
Sep 2009–Jul 2010
11-Month 		41.85"
(1,062.99mm)		 28.28"
(718.31mm)		 13.57"
(344.68mm)		 126th Driest
Driest since:
 1988
2nd Wettest
Wettest since:
 1993
Aug 2009–Jul 2010
12-Month 		47.60"
(1,209.04mm)		 32.14"
(816.36mm)		 15.46"
(392.68mm)		 125th Driest
Driest since:
 1956
3rd Wettest
Wettest since:
 2008
Feb 2009–Jul 2010
18-Month 		68.51"
(1,740.15mm)		 50.60"
(1,285.24mm)		 17.91"
(454.91mm)		 126th Driest
Driest since:
 1911
2nd Wettest
Wettest since:
 2008
Aug 2008–Jul 2010
24-Month 		82.17"
(2,087.12mm)		 64.31"
(1,633.47mm)		 17.86"
(453.65mm)		 121st Driest
Driest since:
 1934
6th Wettest
Wettest since:
 2008
Aug 2007–Jul 2010
36-Month 		132.39"
(3,362.71mm)		 96.40"
(2,448.56mm)		 35.99"
(914.15mm)		 125th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2010
Aug 2006–Jul 2010
48-Month 		169.99"
(4,317.75mm)		 128.38"
(3,260.85mm)		 41.61"
(1,056.90mm)		 124th Driest
Driest since:
 1957
1st Wettest
Wettest to Date
 2010
Aug 2005–Jul 2010
60-Month 		197.06"
(5,005.32mm)		 160.37"
(4,073.40mm)		 36.69"
(931.92mm)		 121st Driest
Driest since:
 1957
3rd Wettest
Wettest to Date
 2011

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