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, December 1947

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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
December 1947 1-Month	1.45" (36.83mm)	1.11" (28.19mm)	0.34" (8.64mm)	91st Driest	Driest since: 1946	2002
	1.45" (36.83mm)	1.11" (28.19mm)	0.34" (8.64mm)	38th Wettest	Wettest since: 1945	2015
	Ties: 1895, 1906
Nov–Dec 1947 2-Month	3.33" (84.58mm)	2.87" (72.90mm)	0.46" (11.68mm)	84th Driest	Driest since: 1946	1976
Nov–Dec 1947 2-Month	3.33" (84.58mm)	2.87" (72.90mm)	0.46" (11.68mm)	45th Wettest	Wettest since: 1941	2015
Oct–Dec 1947 3-Month	7.07" (179.58mm)	5.16" (131.06mm)	1.91" (48.52mm)	109th Driest	Driest since: 1946	1910
Oct–Dec 1947 3-Month	7.07" (179.58mm)	5.16" (131.06mm)	1.91" (48.52mm)	20th Wettest	Wettest since: 1941	1931
Sep–Dec 1947 4-Month	9.17" (232.92mm)	8.83" (224.28mm)	0.34" (8.64mm)	78th Driest	Driest since: 1945	1939, 1976
Sep–Dec 1947 4-Month	9.17" (232.92mm)	8.83" (224.28mm)	0.34" (8.64mm)	51st Wettest	Wettest since: 1946	1931
Aug–Dec 1947 5-Month	10.67" (271.02mm)	12.67" (321.82mm)	-2.00" (-50.80mm)	36th Driest	Driest since: 1943	1976
Aug–Dec 1947 5-Month	10.67" (271.02mm)	12.67" (321.82mm)	-2.00" (-50.80mm)	93rd Wettest	Wettest since: 1946	2018
Jul–Dec 1947 6-Month	12.32" (312.93mm)	16.52" (419.61mm)	-4.20" (-106.68mm)	17th Driest	Driest since: 1939	1976
Jul–Dec 1947 6-Month	12.32" (312.93mm)	16.52" (419.61mm)	-4.20" (-106.68mm)	112th Wettest	Wettest since: 1946	2018
Jun–Dec 1947 7-Month	22.22" (564.39mm)	21.15" (537.21mm)	1.07" (27.18mm)	75th Driest	Driest since: 1945	1976
Jun–Dec 1947 7-Month	22.22" (564.39mm)	21.15" (537.21mm)	1.07" (27.18mm)	54th Wettest	Wettest since: 1946	2018
May–Dec 1947 8-Month	26.45" (671.83mm)	25.20" (640.08mm)	1.25" (31.75mm)	76th Driest	Driest since: 1945	1976
May–Dec 1947 8-Month	26.45" (671.83mm)	25.20" (640.08mm)	1.25" (31.75mm)	53rd Wettest	Wettest since: 1946	1993
Apr–Dec 1947 9-Month	31.36" (796.54mm)	28.15" (715.01mm)	3.21" (81.53mm)	91st Driest	Driest since: 1946	1910
Apr–Dec 1947 9-Month	31.36" (796.54mm)	28.15" (715.01mm)	3.21" (81.53mm)	38th Wettest	Wettest since: 1944	1993
Mar–Dec 1947 10-Month	32.71" (830.83mm)	30.10" (764.54mm)	2.61" (66.29mm)	87th Driest	Driest since: 1946	1910
Mar–Dec 1947 10-Month	32.71" (830.83mm)	30.10" (764.54mm)	2.61" (66.29mm)	42nd Wettest	Wettest since: 1944	1993
Feb–Dec 1947 11-Month	33.01" (838.45mm)	31.12" (790.45mm)	1.89" (48.00mm)	81st Driest	Driest since: 1943	1910
	33.01" (838.45mm)	31.12" (790.45mm)	1.89" (48.00mm)	48th Wettest	Wettest since: 1946	1993
	Ties: 1969
Jan–Dec 1947 12-Month	34.44" (874.78mm)	32.09" (815.09mm)	2.35" (59.69mm)	85th Driest	Driest since: 1945	1910
	34.44" (874.78mm)	32.09" (815.09mm)	2.35" (59.69mm)	44th Wettest	Wettest since: 1946	1993
	Ties: 2013
Jul 1946–Dec 1947 18-Month	51.20" (1,300.48mm)	48.69" (1,236.73mm)	2.51" (63.75mm)	82nd Driest	Driest since: 1946	1956
Jul 1946–Dec 1947 18-Month	51.20" (1,300.48mm)	48.69" (1,236.73mm)	2.51" (63.75mm)	46th Wettest	Wettest since: 1944	1993
Jan 1946–Dec 1947 24-Month	69.30" (1,760.22mm)	64.24" (1,631.70mm)	5.06" (128.52mm)	93rd Driest	Driest since: 1946	1989
Jan 1946–Dec 1947 24-Month	69.30" (1,760.22mm)	64.24" (1,631.70mm)	5.06" (128.52mm)	35th Wettest	Wettest since: 1945	2019
Jan 1945–Dec 1947 36-Month	103.51" (2,629.15mm)	96.36" (2,447.54mm)	7.15" (181.61mm)	96th Driest	Driest since: 1945	1957
Jan 1945–Dec 1947 36-Month	103.51" (2,629.15mm)	96.36" (2,447.54mm)	7.15" (181.61mm)	31st Wettest	Wettest since: 1946	2010
Jan 1944–Dec 1947 48-Month	140.17" (3,560.32mm)	128.37" (3,260.60mm)	11.80" (299.72mm)	101st Driest	Driest since: 1946	1958
Jan 1944–Dec 1947 48-Month	140.17" (3,560.32mm)	128.37" (3,260.60mm)	11.80" (299.72mm)	25th Wettest	Wettest since: 1905	2010
Jan 1943–Dec 1947 60-Month	171.26" (4,350.00mm)	160.36" (4,073.14mm)	10.90" (276.86mm)	94th Driest	Driest since: 1946	1956
Jan 1943–Dec 1947 60-Month	171.26" (4,350.00mm)	160.36" (4,073.14mm)	10.90" (276.86mm)	31st Wettest	Wettest since: 1909	2010

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published June 2023, retrieved on June 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings