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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 1988 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1988 1-Month	-2.11	-0.11	-2.00	9th Driest	Driest since: 1976	1910
December 1988 1-Month	-2.11	-0.11	-2.00	122nd Wettest	Wettest since: 1987	2015
Nov–Dec 1988 2-Month	-1.58	-0.08	-1.50	19th Driest	Driest since: 1976	1917
Nov–Dec 1988 2-Month	-1.58	-0.08	-1.50	112th Wettest	Wettest since: 1987	2015
Oct–Dec 1988 3-Month	-1.88	-0.05	-1.83	12th Driest	Driest since: 1963	1953
Oct–Dec 1988 3-Month	-1.88	-0.05	-1.83	119th Wettest	Wettest since: 1987	1931
Sep–Dec 1988 4-Month	-1.82	0.00	-1.82	13th Driest	Driest since: 1963	1953
Sep–Dec 1988 4-Month	-1.82	0.00	-1.82	118th Wettest	Wettest since: 1987	1931, 1941
Aug–Dec 1988 5-Month	-1.79	-0.02	-1.77	9th Driest	Driest since: 1956	1953
Aug–Dec 1988 5-Month	-1.79	-0.02	-1.77	122nd Wettest	Wettest since: 1987	1902
Jul–Dec 1988 6-Month	-2.01	0.01	-2.02	5th Driest	Driest since: 1953	1953
Jul–Dec 1988 6-Month	-2.01	0.01	-2.02	126th Wettest	Wettest since: 1987	1902
Jun–Dec 1988 7-Month	-2.29	0.02	-2.31	2nd Driest	Driest since: 1953	1953
Jun–Dec 1988 7-Month	-2.29	0.02	-2.31	129th Wettest	Wettest since: 1987	1902
May–Dec 1988 8-Month	-2.36	0.04	-2.40	2nd Driest	Driest since: 1953	1953
May–Dec 1988 8-Month	-2.36	0.04	-2.40	129th Wettest	Wettest since: 1987	1902
Apr–Dec 1988 9-Month	-2.35	0.05	-2.40	1st Driest	Driest to Date	1988
Apr–Dec 1988 9-Month	-2.35	0.05	-2.40	130th Wettest	Wettest since: 1987	2008
Mar–Dec 1988 10-Month	-2.33	0.03	-2.36	2nd Driest	Driest since: 1934	1934
Mar–Dec 1988 10-Month	-2.33	0.03	-2.36	129th Wettest	Wettest since: 1987	1993
Feb–Dec 1988 11-Month	-2.15	0.04	-2.19	3rd Driest	Driest since: 1956	1934
Feb–Dec 1988 11-Month	-2.15	0.04	-2.19	128th Wettest	Wettest since: 1987	2008
Jan–Dec 1988 12-Month	-2.03	0.04	-2.07	3rd Driest	Driest since: 1956	1956
Jan–Dec 1988 12-Month	-2.03	0.04	-2.07	128th Wettest	Wettest since: 1987	1993
Jul 1987–Dec 1988 18-Month	-0.78	0.04	-0.82	20th Driest	Driest since: 1957	1956
Jul 1987–Dec 1988 18-Month	-0.78	0.04	-0.82	110th Wettest	Wettest since: 1987	1993
Jan 1987–Dec 1988 24-Month	-0.68	0.04	-0.72	14th Driest	Driest since: 1957	1934
Jan 1987–Dec 1988 24-Month	-0.68	0.04	-0.72	116th Wettest	Wettest since: 1987	2009
Jan 1986–Dec 1988 36-Month	-0.14	0.04	-0.18	40th Driest	Driest since: 1977	1956
Jan 1986–Dec 1988 36-Month	-0.14	0.04	-0.18	89th Wettest	Wettest since: 1987	2010
Jan 1985–Dec 1988 48-Month	-0.06	0.04	-0.10	42nd Driest	Driest since: 1969	1956
	-0.06	0.04	-0.10	86th Wettest	Wettest since: 1987	2010
	Ties: 1902, 1916, 1927
Jan 1984–Dec 1988 60-Month	0.07	0.04	0.03	57th Driest	Driest since: 1979	1957
Jan 1984–Dec 1988 60-Month	0.07	0.04	0.03	70th Wettest	Wettest since: 1987	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 1988 Palmer Z-Index Rankings

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