Climate at a Glance | Divisional Rankings | National Centers for Environmental Information (NCEI)

Divisional Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska or Hawaii. 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, Climate Division 4

December 2007 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2007 1-Month	2.09	0.05	2.04	119th Driest	Driest since: 2005	1976
December 2007 1-Month	2.09	0.05	2.04	12th Wettest	Wettest since: 2006	2015
Nov–Dec 2007 2-Month	0.70	0.10	0.60	93rd Driest	Driest since: 2005	1976
Nov–Dec 2007 2-Month	0.70	0.10	0.60	38th Wettest	Wettest since: 2006	2015
Oct–Dec 2007 3-Month	1.67	0.11	1.56	111th Driest	Driest since: 2006	1955
Oct–Dec 2007 3-Month	1.67	0.11	1.56	20th Wettest	Wettest since: 1992	2015
Sep–Dec 2007 4-Month	1.36	0.14	1.22	105th Driest	Driest since: 2005	1939
	1.36	0.14	1.22	26th Wettest	Wettest since: 2006	2015
	Ties: 1996
Aug–Dec 2007 5-Month	2.16	0.12	2.04	124th Driest	Driest since: 2006	1976
Aug–Dec 2007 5-Month	2.16	0.12	2.04	7th Wettest	Wettest since: 1982	2015
Jul–Dec 2007 6-Month	1.55	0.13	1.42	111th Driest	Driest since: 2006	1976
Jul–Dec 2007 6-Month	1.55	0.13	1.42	20th Wettest	Wettest since: 1996	2015
Jun–Dec 2007 7-Month	0.90	0.13	0.77	97th Driest	Driest since: 2006	1976
Jun–Dec 2007 7-Month	0.90	0.13	0.77	34th Wettest	Wettest since: 1998	2015
May–Dec 2007 8-Month	1.25	0.13	1.12	109th Driest	Driest since: 2006	1936
May–Dec 2007 8-Month	1.25	0.13	1.12	22nd Wettest	Wettest since: 1996	2015
Apr–Dec 2007 9-Month	1.52	0.13	1.39	113th Driest	Driest since: 2006	1934
Apr–Dec 2007 9-Month	1.52	0.13	1.39	18th Wettest	Wettest since: 1996	2015
Mar–Dec 2007 10-Month	1.44	0.10	1.34	114th Driest	Driest since: 2006	1934
Mar–Dec 2007 10-Month	1.44	0.10	1.34	17th Wettest	Wettest since: 1996	2015
Feb–Dec 2007 11-Month	1.43	0.11	1.32	115th Driest	Driest since: 2006	1934
Feb–Dec 2007 11-Month	1.43	0.11	1.32	16th Wettest	Wettest since: 1993	2015
Jan–Dec 2007 12-Month	1.40	0.11	1.29	117th Driest	Driest since: 2006	1934
Jan–Dec 2007 12-Month	1.40	0.11	1.29	14th Wettest	Wettest since: 1993	2015
Jul 2006–Dec 2007 18-Month	1.35	0.13	1.22	120th Driest	Driest since: 2006	1956
Jul 2006–Dec 2007 18-Month	1.35	0.13	1.22	10th Wettest	Wettest since: 1993	2015
Jan 2006–Dec 2007 24-Month	0.76	0.12	0.64	107th Driest	Driest since: 2006	1934
Jan 2006–Dec 2007 24-Month	0.76	0.12	0.64	23rd Wettest	Wettest since: 1994	2015
Jan 2005–Dec 2007 36-Month	0.43	0.12	0.31	86th Driest	Driest since: 2006	1936
	0.43	0.12	0.31	43rd Wettest	Wettest since: 1998	2009
	Ties: 1997
Jan 2004–Dec 2007 48-Month	0.43	0.12	0.31	89th Driest	Driest since: 2006	1936
	0.43	0.12	0.31	39th Wettest	Wettest since: 1999	2010
	Ties: 1992
Jan 2003–Dec 2007 60-Month	0.33	0.11	0.22	81st Driest	Driest since: 2006	1937
	0.33	0.11	0.22	46th Wettest	Wettest since: 1999	2018
	Ties: 1916

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Iowa, Climate Division 4

December 2007 Palmer Z-Index Rankings

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