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 1926 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1926 1-Month	1.14	0.05	1.09	107th Driest	Driest since: 1925	1976
December 1926 1-Month	1.14	0.05	1.09	24th Wettest	Wettest since: 1924	2015
Nov–Dec 1926 2-Month	1.88	0.10	1.78	119th Driest	Driest since: 1925	1976
Nov–Dec 1926 2-Month	1.88	0.10	1.78	12th Wettest	Wettest since: 1909	2015
Oct–Dec 1926 3-Month	0.97	0.11	0.86	97th Driest	Driest since: 1925	1955
Oct–Dec 1926 3-Month	0.97	0.11	0.86	34th Wettest	Wettest since: 1919	2015
Sep–Dec 1926 4-Month	2.39	0.14	2.25	122nd Driest	Driest since: 1925	1939
Sep–Dec 1926 4-Month	2.39	0.14	2.25	9th Wettest	Wettest since: 1909	2015
Aug–Dec 1926 5-Month	1.74	0.12	1.62	115th Driest	Driest since: 1925	1976
	1.74	0.12	1.62	16th Wettest	Wettest since: 1909	2015
	Ties: 1900
Jul–Dec 1926 6-Month	1.26	0.13	1.13	105th Driest	Driest since: 1925	1976
Jul–Dec 1926 6-Month	1.26	0.13	1.13	26th Wettest	Wettest since: 1915	2015
Jun–Dec 1926 7-Month	1.05	0.13	0.92	107th Driest	Driest since: 1925	1976
Jun–Dec 1926 7-Month	1.05	0.13	0.92	24th Wettest	Wettest since: 1915	2015
May–Dec 1926 8-Month	0.68	0.13	0.55	93rd Driest	Driest since: 1925	1936
May–Dec 1926 8-Month	0.68	0.13	0.55	38th Wettest	Wettest since: 1924	2015
Apr–Dec 1926 9-Month	0.36	0.13	0.23	74th Driest	Driest since: 1925	1934
Apr–Dec 1926 9-Month	0.36	0.13	0.23	57th Wettest	Wettest since: 1924	2015
Mar–Dec 1926 10-Month	0.21	0.10	0.11	71st Driest	Driest since: 1925	1934
Mar–Dec 1926 10-Month	0.21	0.10	0.11	60th Wettest	Wettest since: 1924	2015
Feb–Dec 1926 11-Month	0.17	0.11	0.06	69th Driest	Driest since: 1925	1934
Feb–Dec 1926 11-Month	0.17	0.11	0.06	62nd Wettest	Wettest since: 1924	2015
Jan–Dec 1926 12-Month	0.21	0.11	0.10	72nd Driest	Driest since: 1925	1934
Jan–Dec 1926 12-Month	0.21	0.11	0.10	59th Wettest	Wettest since: 1924	2015
Jul 1925–Dec 1926 18-Month	0.04	0.13	-0.09	55th Driest	Driest since: 1925	1956
Jul 1925–Dec 1926 18-Month	0.04	0.13	-0.09	75th Wettest	Wettest since: 1924	2015
Jan 1925–Dec 1926 24-Month	-0.21	0.12	-0.33	35th Driest	Driest since: 1922	1934
Jan 1925–Dec 1926 24-Month	-0.21	0.12	-0.33	95th Wettest	Wettest since: 1925	2015
Jan 1924–Dec 1926 36-Month	0.03	0.12	-0.09	51st Driest	Driest since: 1923	1936
Jan 1924–Dec 1926 36-Month	0.03	0.12	-0.09	78th Wettest	Wettest since: 1925	2009
Jan 1923–Dec 1926 48-Month	0.16	0.12	0.04	68th Driest	Driest since: 1925	1936
Jan 1923–Dec 1926 48-Month	0.16	0.12	0.04	60th Wettest	Wettest since: 1918	2010
Jan 1922–Dec 1926 60-Month	0.06	0.11	-0.05	47th Driest	Driest since: 1925	1937
Jan 1922–Dec 1926 60-Month	0.06	0.11	-0.05	80th Wettest	Wettest since: 1924	2018

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 1926 Palmer Z-Index Rankings

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