Statewide Rankings

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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 2012

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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
September 2012 1-Month	1.62" (41.15mm)	3.67" (93.22mm)	-2.05" (-52.07mm)	14th Driest	Driest since: 1990	1939
September 2012 1-Month	1.62" (41.15mm)	3.67" (93.22mm)	-2.05" (-52.07mm)	115th Wettest	Wettest since: 2011	1965
Aug–Sep 2012 2-Month	4.50" (114.30mm)	7.51" (190.75mm)	-3.01" (-76.45mm)	11th Driest	Driest since: 2003	1976
	4.50" (114.30mm)	7.51" (190.75mm)	-3.01" (-76.45mm)	118th Wettest	Wettest since: 2011	2018
	Ties: 1899
Jul–Sep 2012 3-Month	5.67" (144.02mm)	11.36" (288.54mm)	-5.69" (-144.52mm)	4th Driest	Driest since: 1976	2013
Jul–Sep 2012 3-Month	5.67" (144.02mm)	11.36" (288.54mm)	-5.69" (-144.52mm)	125th Wettest	Wettest since: 2011	1993
Jun–Sep 2012 4-Month	8.48" (215.39mm)	16.00" (406.40mm)	-7.52" (-191.01mm)	1st Driest	Driest since: 2012	2012
Jun–Sep 2012 4-Month	8.48" (215.39mm)	16.00" (406.40mm)	-7.52" (-191.01mm)	128th Wettest	Wettest since: 2011	1993
May–Sep 2012 5-Month	11.99" (304.55mm)	20.04" (509.02mm)	-8.05" (-204.47mm)	2nd Driest	Driest since: 1976	1976
May–Sep 2012 5-Month	11.99" (304.55mm)	20.04" (509.02mm)	-8.05" (-204.47mm)	127th Wettest	Wettest since: 2011	1993
Apr–Sep 2012 6-Month	15.89" (403.61mm)	22.99" (583.95mm)	-7.10" (-180.34mm)	2nd Driest	Driest since: 1988	1988
Apr–Sep 2012 6-Month	15.89" (403.61mm)	22.99" (583.95mm)	-7.10" (-180.34mm)	127th Wettest	Wettest since: 2011	1993
Mar–Sep 2012 7-Month	17.80" (452.12mm)	24.94" (633.48mm)	-7.14" (-181.36mm)	4th Driest	Driest since: 1988	1988
Mar–Sep 2012 7-Month	17.80" (452.12mm)	24.94" (633.48mm)	-7.14" (-181.36mm)	125th Wettest	Wettest since: 2011	1993
Feb–Sep 2012 8-Month	19.48" (494.79mm)	25.96" (659.38mm)	-6.48" (-164.59mm)	4th Driest	Driest since: 1988	1988
Feb–Sep 2012 8-Month	19.48" (494.79mm)	25.96" (659.38mm)	-6.48" (-164.59mm)	125th Wettest	Wettest since: 2011	1993
Jan–Sep 2012 9-Month	20.05" (509.27mm)	26.93" (684.02mm)	-6.88" (-174.75mm)	4th Driest	Driest since: 1988	1988
Jan–Sep 2012 9-Month	20.05" (509.27mm)	26.93" (684.02mm)	-6.88" (-174.75mm)	125th Wettest	Wettest since: 2011	1993
Dec 2011–Sep 2012 10-Month	22.13" (562.10mm)	28.04" (712.22mm)	-5.91" (-150.12mm)	9th Driest	Driest since: 1988	1988
Dec 2011–Sep 2012 10-Month	22.13" (562.10mm)	28.04" (712.22mm)	-5.91" (-150.12mm)	119th Wettest	Wettest since: 2011	1993
Nov 2011–Sep 2012 11-Month	24.21" (614.93mm)	29.78" (756.41mm)	-5.57" (-141.48mm)	9th Driest	Driest since: 2003	1934
Nov 2011–Sep 2012 11-Month	24.21" (614.93mm)	29.78" (756.41mm)	-5.57" (-141.48mm)	119th Wettest	Wettest since: 2011	1993
Oct 2011–Sep 2012 12-Month	24.95" (633.73mm)	32.09" (815.09mm)	-7.14" (-181.36mm)	4th Driest	Driest since: 1988	1934
Oct 2011–Sep 2012 12-Month	24.95" (633.73mm)	32.09" (815.09mm)	-7.14" (-181.36mm)	124th Wettest	Wettest since: 2011	1993
Apr 2011–Sep 2012 18-Month	48.05" (1,220.47mm)	55.13" (1,400.30mm)	-7.08" (-179.83mm)	15th Driest	Driest since: 1989	1934
Apr 2011–Sep 2012 18-Month	48.05" (1,220.47mm)	55.13" (1,400.30mm)	-7.08" (-179.83mm)	113th Wettest	Wettest since: 2011	1993
Oct 2010–Sep 2012 24-Month	55.66" (1,413.76mm)	64.26" (1,632.20mm)	-8.60" (-218.44mm)	10th Driest	Driest since: 1989	1956
Oct 2010–Sep 2012 24-Month	55.66" (1,413.76mm)	64.26" (1,632.20mm)	-8.60" (-218.44mm)	117th Wettest	Wettest since: 2011	1993
Oct 2009–Sep 2012 36-Month	106.01" (2,692.65mm)	96.36" (2,447.54mm)	9.65" (245.11mm)	102nd Driest	Driest since: 2007	1957
Oct 2009–Sep 2012 36-Month	106.01" (2,692.65mm)	96.36" (2,447.54mm)	9.65" (245.11mm)	24th Wettest	Wettest since: 2011	2010
Oct 2008–Sep 2012 48-Month	141.94" (3,605.28mm)	128.36" (3,260.34mm)	13.58" (344.94mm)	105th Driest	Driest since: 2007	1958
Oct 2008–Sep 2012 48-Month	141.94" (3,605.28mm)	128.36" (3,260.34mm)	13.58" (344.94mm)	20th Wettest	Wettest since: 2011	2010
Oct 2007–Sep 2012 60-Month	185.72" (4,717.29mm)	160.34" (4,072.64mm)	25.38" (644.65mm)	115th Driest	Driest since: 2009	1957
Oct 2007–Sep 2012 60-Month	185.72" (4,717.29mm)	160.34" (4,072.64mm)	25.38" (644.65mm)	9th Wettest	Wettest since: 2011	2010

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published November 2022, retrieved on December 1, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings