Statewide Rankings

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Month:

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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 2009

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Record Driest
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Bottom ⅓
Normal
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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
September 2009 1-Month	1.73" (43.94mm)	3.67" (93.22mm)	-1.94" (-49.28mm)	17th Driest	Driest since: 2002	1939
September 2009 1-Month	1.73" (43.94mm)	3.67" (93.22mm)	-1.94" (-49.28mm)	112th Wettest	Wettest since: 2008	1965
Aug–Sep 2009 2-Month	7.48" (189.99mm)	7.51" (190.75mm)	-0.03" (-0.76mm)	69th Driest	Driest since: 2008	1976
Aug–Sep 2009 2-Month	7.48" (189.99mm)	7.51" (190.75mm)	-0.03" (-0.76mm)	60th Wettest	Wettest since: 2007	2018
Jul–Sep 2009 3-Month	12.10" (307.34mm)	11.36" (288.54mm)	0.74" (18.80mm)	86th Driest	Driest since: 2008	2013
Jul–Sep 2009 3-Month	12.10" (307.34mm)	11.36" (288.54mm)	0.74" (18.80mm)	43rd Wettest	Wettest since: 2007	1993
Jun–Sep 2009 4-Month	17.39" (441.71mm)	16.00" (406.40mm)	1.39" (35.31mm)	85th Driest	Driest since: 2006	2012
Jun–Sep 2009 4-Month	17.39" (441.71mm)	16.00" (406.40mm)	1.39" (35.31mm)	44th Wettest	Wettest since: 2008	1993
May–Sep 2009 5-Month	21.03" (534.16mm)	20.04" (509.02mm)	0.99" (25.14mm)	78th Driest	Driest since: 2006	1976
May–Sep 2009 5-Month	21.03" (534.16mm)	20.04" (509.02mm)	0.99" (25.14mm)	51st Wettest	Wettest since: 2008	1993
Apr–Sep 2009 6-Month	24.63" (625.60mm)	22.99" (583.95mm)	1.64" (41.65mm)	86th Driest	Driest since: 2006	1988
Apr–Sep 2009 6-Month	24.63" (625.60mm)	22.99" (583.95mm)	1.64" (41.65mm)	43rd Wettest	Wettest since: 2008	1993
Mar–Sep 2009 7-Month	27.60" (701.04mm)	24.94" (633.48mm)	2.66" (67.56mm)	96th Driest	Driest since: 2006	1988
Mar–Sep 2009 7-Month	27.60" (701.04mm)	24.94" (633.48mm)	2.66" (67.56mm)	33rd Wettest	Wettest since: 2008	1993
Feb–Sep 2009 8-Month	28.39" (721.11mm)	25.96" (659.38mm)	2.43" (61.73mm)	91st Driest	Driest since: 2006	1988
Feb–Sep 2009 8-Month	28.39" (721.11mm)	25.96" (659.38mm)	2.43" (61.73mm)	38th Wettest	Wettest since: 2008	1993
Jan–Sep 2009 9-Month	29.07" (738.38mm)	26.93" (684.02mm)	2.14" (54.36mm)	88th Driest	Driest since: 2006	1988
Jan–Sep 2009 9-Month	29.07" (738.38mm)	26.93" (684.02mm)	2.14" (54.36mm)	41st Wettest	Wettest since: 2008	1993
Dec 2008–Sep 2009 10-Month	30.95" (786.13mm)	28.04" (712.22mm)	2.91" (73.91mm)	95th Driest	Driest since: 2006	1988
Dec 2008–Sep 2009 10-Month	30.95" (786.13mm)	28.04" (712.22mm)	2.91" (73.91mm)	33rd Wettest	Wettest since: 2008	1993
Nov 2008–Sep 2009 11-Month	32.67" (829.82mm)	29.78" (756.41mm)	2.89" (73.41mm)	93rd Driest	Driest since: 2006	1934
Nov 2008–Sep 2009 11-Month	32.67" (829.82mm)	29.78" (756.41mm)	2.89" (73.41mm)	35th Wettest	Wettest since: 2008	1993
Oct 2008–Sep 2009 12-Month	35.93" (912.62mm)	32.09" (815.09mm)	3.84" (97.53mm)	95th Driest	Driest since: 2006	1934
Oct 2008–Sep 2009 12-Month	35.93" (912.62mm)	32.09" (815.09mm)	3.84" (97.53mm)	33rd Wettest	Wettest since: 2008	1993
Apr 2008–Sep 2009 18-Month	68.34" (1,735.84mm)	55.13" (1,400.30mm)	13.21" (335.54mm)	120th Driest	Driest since: 2007	1934
Apr 2008–Sep 2009 18-Month	68.34" (1,735.84mm)	55.13" (1,400.30mm)	13.21" (335.54mm)	8th Wettest	Wettest since: 2008	1993
Oct 2007–Sep 2009 24-Month	79.71" (2,024.63mm)	64.26" (1,632.20mm)	15.45" (392.43mm)	117th Driest	Driest since: 2007	1956
Oct 2007–Sep 2009 24-Month	79.71" (2,024.63mm)	64.26" (1,632.20mm)	15.45" (392.43mm)	10th Wettest	Wettest since: 2008	1993
Oct 2006–Sep 2009 36-Month	119.90" (3,045.46mm)	96.36" (2,447.54mm)	23.54" (597.92mm)	123rd Driest	Driest since: 2008	1957
Oct 2006–Sep 2009 36-Month	119.90" (3,045.46mm)	96.36" (2,447.54mm)	23.54" (597.92mm)	3rd Wettest	Wettest since: 1993	2010
Oct 2005–Sep 2009 48-Month	150.63" (3,826.00mm)	128.36" (3,260.34mm)	22.27" (565.66mm)	117th Driest	Driest since: 2008	1958
Oct 2005–Sep 2009 48-Month	150.63" (3,826.00mm)	128.36" (3,260.34mm)	22.27" (565.66mm)	8th Wettest	Wettest since: 1994	2010
Oct 2004–Sep 2009 60-Month	181.48" (4,609.59mm)	160.34" (4,072.64mm)	21.14" (536.95mm)	109th Driest	Driest since: 2007	1957
Oct 2004–Sep 2009 60-Month	181.48" (4,609.59mm)	160.34" (4,072.64mm)	21.14" (536.95mm)	15th Wettest	Wettest since: 2008	2010

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 5, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings