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 1983 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1983 1-Month	0.13	0.05	0.08	72nd Driest	Driest since: 1981	1976
December 1983 1-Month	0.13	0.05	0.08	59th Wettest	Wettest since: 1982	2015
Nov–Dec 1983 2-Month	1.77	0.10	1.67	117th Driest	Driest since: 1981	1976
Nov–Dec 1983 2-Month	1.77	0.10	1.67	14th Wettest	Wettest since: 1982	2015
Oct–Dec 1983 3-Month	1.60	0.11	1.49	110th Driest	Driest since: 1981	1955
Oct–Dec 1983 3-Month	1.60	0.11	1.49	21st Wettest	Wettest since: 1982	2015
Sep–Dec 1983 4-Month	1.00	0.14	0.86	96th Driest	Driest since: 1981	1939
Sep–Dec 1983 4-Month	1.00	0.14	0.86	35th Wettest	Wettest since: 1982	2015
Aug–Dec 1983 5-Month	0.25	0.12	0.13	75th Driest	Driest since: 1981	1976
Aug–Dec 1983 5-Month	0.25	0.12	0.13	56th Wettest	Wettest since: 1982	2015
Jul–Dec 1983 6-Month	-0.04	0.13	-0.17	62nd Driest	Driest since: 1981	1976
Jul–Dec 1983 6-Month	-0.04	0.13	-0.17	69th Wettest	Wettest since: 1982	2015
Jun–Dec 1983 7-Month	0.41	0.13	0.28	78th Driest	Driest since: 1981	1976
	0.41	0.13	0.28	53rd Wettest	Wettest since: 1982	2015
	Ties: 1906, 1940
May–Dec 1983 8-Month	0.52	0.13	0.39	84th Driest	Driest since: 1981	1936
May–Dec 1983 8-Month	0.52	0.13	0.39	47th Wettest	Wettest since: 1982	2015
Apr–Dec 1983 9-Month	0.54	0.13	0.41	88th Driest	Driest since: 1981	1934
Apr–Dec 1983 9-Month	0.54	0.13	0.41	43rd Wettest	Wettest since: 1982	2015
Mar–Dec 1983 10-Month	0.91	0.10	0.81	101st Driest	Driest since: 1981	1934
Mar–Dec 1983 10-Month	0.91	0.10	0.81	30th Wettest	Wettest since: 1982	2015
Feb–Dec 1983 11-Month	0.92	0.11	0.81	103rd Driest	Driest since: 1981	1934
	0.92	0.11	0.81	28th Wettest	Wettest since: 1982	2015
	Ties: 1900, 1919, 1944
Jan–Dec 1983 12-Month	0.92	0.11	0.81	104th Driest	Driest since: 1981	1934
Jan–Dec 1983 12-Month	0.92	0.11	0.81	27th Wettest	Wettest since: 1982	2015
Jul 1982–Dec 1983 18-Month	1.35	0.13	1.22	120th Driest	Driest since: 1982	1956
Jul 1982–Dec 1983 18-Month	1.35	0.13	1.22	10th Wettest	Wettest since: 1973	2015
Jan 1982–Dec 1983 24-Month	1.17	0.12	1.05	118th Driest	Driest since: 1982	1934
Jan 1982–Dec 1983 24-Month	1.17	0.12	1.05	12th Wettest	Wettest since: 1973	2015
Jan 1981–Dec 1983 36-Month	0.32	0.12	0.20	77th Driest	Driest since: 1982	1936
	0.32	0.12	0.20	52nd Wettest	Wettest since: 1979	2009
	Ties: 1906
Jan 1980–Dec 1983 48-Month	0.03	0.12	-0.09	48th Driest	Driest since: 1982	1936
	0.03	0.12	-0.09	80th Wettest	Wettest since: 1980	2010
	Ties: 1898, 1899
Jan 1979–Dec 1983 60-Month	0.18	0.11	0.07	62nd Driest	Driest since: 1982	1937
	0.18	0.11	0.07	65th Wettest	Wettest since: 1976	2018
	Ties: 1969

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 1983 Palmer Z-Index Rankings

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