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 8

December 1929 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1929 1-Month	-1.05	-0.11	-0.94	30th Driest	Driest since: 1923	1910
December 1929 1-Month	-1.05	-0.11	-0.94	101st Wettest	Wettest since: 1928	2015
Nov–Dec 1929 2-Month	-0.56	-0.08	-0.48	43rd Driest	Driest since: 1927	1917
	-0.56	-0.08	-0.48	88th Wettest	Wettest since: 1928	2015
	Ties: 1903, 1921
Oct–Dec 1929 3-Month	0.14	-0.05	0.19	69th Driest	Driest since: 1927	1953
Oct–Dec 1929 3-Month	0.14	-0.05	0.19	62nd Wettest	Wettest since: 1928	1931
Sep–Dec 1929 4-Month	-0.01	0.00	-0.01	65th Driest	Driest since: 1927	1953
Sep–Dec 1929 4-Month	-0.01	0.00	-0.01	66th Wettest	Wettest since: 1928	1931, 1941
Aug–Dec 1929 5-Month	-0.39	-0.02	-0.37	54th Driest	Driest since: 1927	1953
Aug–Dec 1929 5-Month	-0.39	-0.02	-0.37	77th Wettest	Wettest since: 1928	1902
Jul–Dec 1929 6-Month	-0.16	0.01	-0.17	62nd Driest	Driest since: 1927	1953
Jul–Dec 1929 6-Month	-0.16	0.01	-0.17	69th Wettest	Wettest since: 1928	1902
Jun–Dec 1929 7-Month	-0.27	0.02	-0.29	51st Driest	Driest since: 1927	1953
Jun–Dec 1929 7-Month	-0.27	0.02	-0.29	80th Wettest	Wettest since: 1928	1902
May–Dec 1929 8-Month	-0.48	0.04	-0.52	45th Driest	Driest since: 1927	1953
May–Dec 1929 8-Month	-0.48	0.04	-0.52	86th Wettest	Wettest since: 1928	1902
Apr–Dec 1929 9-Month	-0.17	0.05	-0.22	53rd Driest	Driest since: 1927	1988
Apr–Dec 1929 9-Month	-0.17	0.05	-0.22	78th Wettest	Wettest since: 1928	2008
Mar–Dec 1929 10-Month	-0.30	0.03	-0.33	48th Driest	Driest since: 1927	1934
Mar–Dec 1929 10-Month	-0.30	0.03	-0.33	83rd Wettest	Wettest since: 1928	1993
Feb–Dec 1929 11-Month	-0.17	0.04	-0.21	51st Driest	Driest since: 1927	1934
Feb–Dec 1929 11-Month	-0.17	0.04	-0.21	80th Wettest	Wettest since: 1928	2008
Jan–Dec 1929 12-Month	0.08	0.04	0.04	65th Driest	Driest since: 1927	1956
Jan–Dec 1929 12-Month	0.08	0.04	0.04	66th Wettest	Wettest since: 1928	1993
Jul 1928–Dec 1929 18-Month	0.69	0.04	0.65	101st Driest	Driest since: 1928	1956
Jul 1928–Dec 1929 18-Month	0.69	0.04	0.65	29th Wettest	Wettest since: 1915	1993
Jan 1928–Dec 1929 24-Month	0.39	0.04	0.35	83rd Driest	Driest since: 1928	1934
Jan 1928–Dec 1929 24-Month	0.39	0.04	0.35	47th Wettest	Wettest since: 1920	2009
Jan 1927–Dec 1929 36-Month	0.14	0.04	0.10	68th Driest	Driest since: 1927	1956
Jan 1927–Dec 1929 36-Month	0.14	0.04	0.10	61st Wettest	Wettest since: 1928	2010
Jan 1926–Dec 1929 48-Month	0.22	0.04	0.18	77th Driest	Driest since: 1928	1956
Jan 1926–Dec 1929 48-Month	0.22	0.04	0.18	51st Wettest	Wettest since: 1922	2010
Jan 1925–Dec 1929 60-Month	0.13	0.04	0.09	71st Driest	Driest since: 1928	1957
Jan 1925–Dec 1929 60-Month	0.13	0.04	0.09	56th Wettest	Wettest since: 1923	2011

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 8

December 1929 Palmer Z-Index Rankings

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