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 1965 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1965 1-Month	0.81	0.05	0.76	101st Driest	Driest since: 1964	1976
December 1965 1-Month	0.81	0.05	0.76	30th Wettest	Wettest since: 1961	2015
Nov–Dec 1965 2-Month	0.39	0.10	0.29	81st Driest	Driest since: 1964	1976
Nov–Dec 1965 2-Month	0.39	0.10	0.29	50th Wettest	Wettest since: 1961	2015
Oct–Dec 1965 3-Month	0.08	0.11	-0.03	67th Driest	Driest since: 1964	1955
Oct–Dec 1965 3-Month	0.08	0.11	-0.03	64th Wettest	Wettest since: 1961	2015
Sep–Dec 1965 4-Month	2.23	0.14	2.09	119th Driest	Driest since: 1964	1939
Sep–Dec 1965 4-Month	2.23	0.14	2.09	12th Wettest	Wettest since: 1931	2015
Aug–Dec 1965 5-Month	1.64	0.12	1.52	111th Driest	Driest since: 1964	1976
Aug–Dec 1965 5-Month	1.64	0.12	1.52	20th Wettest	Wettest since: 1951	2015
Jul–Dec 1965 6-Month	1.33	0.13	1.20	106th Driest	Driest since: 1964	1976
Jul–Dec 1965 6-Month	1.33	0.13	1.20	25th Wettest	Wettest since: 1961	2015
Jun–Dec 1965 7-Month	1.05	0.13	0.92	107th Driest	Driest since: 1964	1976
Jun–Dec 1965 7-Month	1.05	0.13	0.92	24th Wettest	Wettest since: 1961	2015
May–Dec 1965 8-Month	1.09	0.13	0.96	104th Driest	Driest since: 1964	1936
May–Dec 1965 8-Month	1.09	0.13	0.96	27th Wettest	Wettest since: 1961	2015
Apr–Dec 1965 9-Month	1.11	0.13	0.98	106th Driest	Driest since: 1964	1934
Apr–Dec 1965 9-Month	1.11	0.13	0.98	25th Wettest	Wettest since: 1951	2015
Mar–Dec 1965 10-Month	1.20	0.10	1.10	109th Driest	Driest since: 1964	1934
Mar–Dec 1965 10-Month	1.20	0.10	1.10	22nd Wettest	Wettest since: 1951	2015
Feb–Dec 1965 11-Month	1.27	0.11	1.16	111th Driest	Driest since: 1964	1934
Feb–Dec 1965 11-Month	1.27	0.11	1.16	20th Wettest	Wettest since: 1951	2015
Jan–Dec 1965 12-Month	1.18	0.11	1.07	111th Driest	Driest since: 1964	1934
Jan–Dec 1965 12-Month	1.18	0.11	1.07	20th Wettest	Wettest since: 1951	2015
Jul 1964–Dec 1965 18-Month	0.97	0.13	0.84	111th Driest	Driest since: 1964	1956
Jul 1964–Dec 1965 18-Month	0.97	0.13	0.84	19th Wettest	Wettest since: 1952	2015
Jan 1964–Dec 1965 24-Month	0.74	0.12	0.62	104th Driest	Driest since: 1964	1934
Jan 1964–Dec 1965 24-Month	0.74	0.12	0.62	26th Wettest	Wettest since: 1962	2015
Jan 1963–Dec 1965 36-Month	0.35	0.12	0.23	78th Driest	Driest since: 1964	1936
Jan 1963–Dec 1965 36-Month	0.35	0.12	0.23	51st Wettest	Wettest since: 1963	2009
Jan 1962–Dec 1965 48-Month	0.42	0.12	0.30	87th Driest	Driest since: 1964	1936
Jan 1962–Dec 1965 48-Month	0.42	0.12	0.30	41st Wettest	Wettest since: 1962	2010
Jan 1961–Dec 1965 60-Month	0.52	0.11	0.41	102nd Driest	Driest since: 1964	1937
Jan 1961–Dec 1965 60-Month	0.52	0.11	0.41	25th Wettest	Wettest since: 1909	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 1965 Palmer Z-Index Rankings

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