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 1968 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1968 1-Month	0.47	-0.11	0.58	92nd Driest	Driest since: 1967	1910
December 1968 1-Month	0.47	-0.11	0.58	39th Wettest	Wettest since: 1965	2015
Nov–Dec 1968 2-Month	0.01	-0.08	0.09	70th Driest	Driest since: 1967	1917
Nov–Dec 1968 2-Month	0.01	-0.08	0.09	61st Wettest	Wettest since: 1965	2015
Oct–Dec 1968 3-Month	-0.14	-0.05	-0.09	59th Driest	Driest since: 1966	1953
Oct–Dec 1968 3-Month	-0.14	-0.05	-0.09	72nd Wettest	Wettest since: 1967	1931
Sep–Dec 1968 4-Month	-0.35	0.00	-0.35	53rd Driest	Driest since: 1966	1953
Sep–Dec 1968 4-Month	-0.35	0.00	-0.35	78th Wettest	Wettest since: 1967	1931, 1941
Aug–Dec 1968 5-Month	-0.44	-0.02	-0.42	51st Driest	Driest since: 1967	1953
Aug–Dec 1968 5-Month	-0.44	-0.02	-0.42	80th Wettest	Wettest since: 1965	1902
Jul–Dec 1968 6-Month	-0.27	0.01	-0.28	57th Driest	Driest since: 1967	1953
	-0.27	0.01	-0.28	74th Wettest	Wettest since: 1965	1902
	Ties: 1920, 1957
Jun–Dec 1968 7-Month	-0.47	0.02	-0.49	45th Driest	Driest since: 1966	1953
Jun–Dec 1968 7-Month	-0.47	0.02	-0.49	86th Wettest	Wettest since: 1967	1902
May–Dec 1968 8-Month	-0.58	0.04	-0.62	39th Driest	Driest since: 1966	1953
May–Dec 1968 8-Month	-0.58	0.04	-0.62	92nd Wettest	Wettest since: 1967	1902
Apr–Dec 1968 9-Month	-0.23	0.05	-0.28	49th Driest	Driest since: 1966	1988
Apr–Dec 1968 9-Month	-0.23	0.05	-0.28	82nd Wettest	Wettest since: 1967	2008
Mar–Dec 1968 10-Month	-0.42	0.03	-0.45	43rd Driest	Driest since: 1966	1934
Mar–Dec 1968 10-Month	-0.42	0.03	-0.45	88th Wettest	Wettest since: 1967	1993
Feb–Dec 1968 11-Month	-0.48	0.04	-0.52	34th Driest	Driest since: 1966	1934
Feb–Dec 1968 11-Month	-0.48	0.04	-0.52	97th Wettest	Wettest since: 1967	2008
Jan–Dec 1968 12-Month	-0.50	0.04	-0.54	33rd Driest	Driest since: 1966	1956
	-0.50	0.04	-0.54	98th Wettest	Wettest since: 1967	1993
	Ties: 1897
Jul 1967–Dec 1968 18-Month	-0.55	0.04	-0.59	30th Driest	Driest since: 1963	1956
Jul 1967–Dec 1968 18-Month	-0.55	0.04	-0.59	100th Wettest	Wettest since: 1967	1993
Jan 1967–Dec 1968 24-Month	-0.30	0.04	-0.34	36th Driest	Driest since: 1967	1934
Jan 1967–Dec 1968 24-Month	-0.30	0.04	-0.34	94th Wettest	Wettest since: 1966	2009
Jan 1966–Dec 1968 36-Month	-0.40	0.04	-0.44	20th Driest	Driest since: 1958	1956
	-0.40	0.04	-0.44	109th Wettest	Wettest since: 1967	2010
	Ties: 1914
Jan 1965–Dec 1968 48-Month	-0.09	0.04	-0.13	40th Driest	Driest since: 1966	1956
	-0.09	0.04	-0.13	88th Wettest	Wettest since: 1967	2010
	Ties: 1926
Jan 1964–Dec 1968 60-Month	-0.11	0.04	-0.15	38th Driest	Driest since: 1967	1957
Jan 1964–Dec 1968 60-Month	-0.11	0.04	-0.15	89th Wettest	Wettest since: 1965	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 1968 Palmer Z-Index Rankings

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