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 2002 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2002 1-Month	-1.16	0.05	-1.21	18th Driest	Driest since: 1980	1976
December 2002 1-Month	-1.16	0.05	-1.21	113th Wettest	Wettest since: 2001	2015
Nov–Dec 2002 2-Month	-1.03	0.10	-1.13	24th Driest	Driest since: 1999	1976
Nov–Dec 2002 2-Month	-1.03	0.10	-1.13	107th Wettest	Wettest since: 2001	2015
Oct–Dec 2002 3-Month	0.24	0.11	0.13	76th Driest	Driest since: 2001	1955
Oct–Dec 2002 3-Month	0.24	0.11	0.13	55th Wettest	Wettest since: 1998	2015
Sep–Dec 2002 4-Month	-0.16	0.14	-0.30	60th Driest	Driest since: 2001	1939
Sep–Dec 2002 4-Month	-0.16	0.14	-0.30	71st Wettest	Wettest since: 1996	2015
Aug–Dec 2002 5-Month	0.58	0.12	0.46	85th Driest	Driest since: 2001	1976
	0.58	0.12	0.46	46th Wettest	Wettest since: 1996	2015
	Ties: 1991
Jul–Dec 2002 6-Month	0.32	0.13	0.19	75th Driest	Driest since: 2001	1976
Jul–Dec 2002 6-Month	0.32	0.13	0.19	56th Wettest	Wettest since: 1996	2015
Jun–Dec 2002 7-Month	-0.05	0.13	-0.18	61st Driest	Driest since: 2001	1976
Jun–Dec 2002 7-Month	-0.05	0.13	-0.18	70th Wettest	Wettest since: 1998	2015
May–Dec 2002 8-Month	0.06	0.13	-0.07	61st Driest	Driest since: 2000	1936
May–Dec 2002 8-Month	0.06	0.13	-0.07	70th Wettest	Wettest since: 2001	2015
Apr–Dec 2002 9-Month	0.14	0.13	0.01	61st Driest	Driest since: 2000	1934
	0.14	0.13	0.01	70th Wettest	Wettest since: 2001	2015
	Ties: 1942, 1943
Mar–Dec 2002 10-Month	0.02	0.10	-0.08	57th Driest	Driest since: 2000	1934
	0.02	0.10	-0.08	74th Wettest	Wettest since: 2001	2015
	Ties: 1917
Feb–Dec 2002 11-Month	-0.05	0.11	-0.16	54th Driest	Driest since: 2000	1934
	-0.05	0.11	-0.16	77th Wettest	Wettest since: 2001	2015
	Ties: 1917
Jan–Dec 2002 12-Month	-0.14	0.11	-0.25	49th Driest	Driest since: 2000	1934
Jan–Dec 2002 12-Month	-0.14	0.11	-0.25	82nd Wettest	Wettest since: 2001	2015
Jul 2001–Dec 2002 18-Month	-0.25	0.13	-0.38	40th Driest	Driest since: 2001	1956
Jul 2001–Dec 2002 18-Month	-0.25	0.13	-0.38	90th Wettest	Wettest since: 1999	2015
Jan 2001–Dec 2002 24-Month	0.01	0.12	-0.11	55th Driest	Driest since: 2001	1934
Jan 2001–Dec 2002 24-Month	0.01	0.12	-0.11	75th Wettest	Wettest since: 1999	2015
Jan 2000–Dec 2002 36-Month	-0.42	0.12	-0.54	22nd Driest	Driest since: 1981	1936
Jan 2000–Dec 2002 36-Month	-0.42	0.12	-0.54	107th Wettest	Wettest since: 2001	2009
Jan 1999–Dec 2002 48-Month	-0.23	0.12	-0.35	25th Driest	Driest since: 1978	1936
	-0.23	0.12	-0.35	103rd Wettest	Wettest since: 2001	2010
	Ties: 1942
Jan 1998–Dec 2002 60-Month	0.01	0.11	-0.10	40th Driest	Driest since: 2001	1937
	0.01	0.11	-0.10	87th Wettest	Wettest since: 2000	2018
	Ties: 1927

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 2002 Palmer Z-Index Rankings

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