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 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	1.66	-0.11	1.77	115th Driest	Driest since: 1964	1910
December 1965 1-Month	1.66	-0.11	1.77	16th Wettest	Wettest since: 1959	2015
Nov–Dec 1965 2-Month	0.75	-0.08	0.83	95th Driest	Driest since: 1964	1917
Nov–Dec 1965 2-Month	0.75	-0.08	0.83	36th Wettest	Wettest since: 1961	2015
Oct–Dec 1965 3-Month	0.11	-0.05	0.16	67th Driest	Driest since: 1964	1953
Oct–Dec 1965 3-Month	0.11	-0.05	0.16	64th Wettest	Wettest since: 1962	1931
Sep–Dec 1965 4-Month	1.27	0.00	1.27	107th Driest	Driest since: 1964	1953
Sep–Dec 1965 4-Month	1.27	0.00	1.27	24th Wettest	Wettest since: 1961	1931, 1941
Aug–Dec 1965 5-Month	1.01	-0.02	1.03	101st Driest	Driest since: 1964	1953
Aug–Dec 1965 5-Month	1.01	-0.02	1.03	30th Wettest	Wettest since: 1961	1902
Jul–Dec 1965 6-Month	0.77	0.01	0.76	93rd Driest	Driest since: 1964	1953
Jul–Dec 1965 6-Month	0.77	0.01	0.76	38th Wettest	Wettest since: 1961	1902
Jun–Dec 1965 7-Month	0.69	0.02	0.67	86th Driest	Driest since: 1964	1953
Jun–Dec 1965 7-Month	0.69	0.02	0.67	45th Wettest	Wettest since: 1961	1902
May–Dec 1965 8-Month	0.49	0.04	0.45	82nd Driest	Driest since: 1964	1953
	0.49	0.04	0.45	49th Wettest	Wettest since: 1961	1902
	Ties: 1895
Apr–Dec 1965 9-Month	0.73	0.05	0.68	93rd Driest	Driest since: 1964	1988
Apr–Dec 1965 9-Month	0.73	0.05	0.68	38th Wettest	Wettest since: 1961	2008
Mar–Dec 1965 10-Month	0.77	0.03	0.74	97th Driest	Driest since: 1964	1934
Mar–Dec 1965 10-Month	0.77	0.03	0.74	34th Wettest	Wettest since: 1961	1993
Feb–Dec 1965 11-Month	0.72	0.04	0.68	98th Driest	Driest since: 1964	1934
Feb–Dec 1965 11-Month	0.72	0.04	0.68	33rd Wettest	Wettest since: 1961	2008
Jan–Dec 1965 12-Month	0.84	0.04	0.80	106th Driest	Driest since: 1964	1956
Jan–Dec 1965 12-Month	0.84	0.04	0.80	25th Wettest	Wettest since: 1961	1993
Jul 1964–Dec 1965 18-Month	0.62	0.04	0.58	99th Driest	Driest since: 1964	1956
Jul 1964–Dec 1965 18-Month	0.62	0.04	0.58	31st Wettest	Wettest since: 1962	1993
Jan 1964–Dec 1965 24-Month	0.32	0.04	0.28	79th Driest	Driest since: 1964	1934
Jan 1964–Dec 1965 24-Month	0.32	0.04	0.28	51st Wettest	Wettest since: 1962	2009
Jan 1963–Dec 1965 36-Month	-0.06	0.04	-0.10	45th Driest	Driest since: 1964	1956
	-0.06	0.04	-0.10	84th Wettest	Wettest since: 1963	2010
	Ties: 1930
Jan 1962–Dec 1965 48-Month	-0.04	0.04	-0.08	47th Driest	Driest since: 1959	1956
Jan 1962–Dec 1965 48-Month	-0.04	0.04	-0.08	81st Wettest	Wettest since: 1964	2010
Jan 1961–Dec 1965 60-Month	0.26	0.04	0.22	82nd Driest	Driest since: 1960	1957
Jan 1961–Dec 1965 60-Month	0.26	0.04	0.22	45th Wettest	Wettest since: 1964	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 1965 Palmer Z-Index Rankings

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