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 1903 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1903 1-Month	-0.73	-0.11	-0.62	38th Driest	Driest since: 1901	1910
December 1903 1-Month	-0.73	-0.11	-0.62	93rd Wettest	Wettest since: 1902	2015
Nov–Dec 1903 2-Month	-0.56	-0.08	-0.48	43rd Driest	Driest since: 1901	1917
Nov–Dec 1903 2-Month	-0.56	-0.08	-0.48	88th Wettest	Wettest since: 1902	2015
Oct–Dec 1903 3-Month	-0.49	-0.05	-0.44	43rd Driest	Driest since: 1901	1953
Oct–Dec 1903 3-Month	-0.49	-0.05	-0.44	88th Wettest	Wettest since: 1902	1931
Sep–Dec 1903 4-Month	0.01	0.00	0.01	67th Driest	Driest since: 1901	1953
Sep–Dec 1903 4-Month	0.01	0.00	0.01	64th Wettest	Wettest since: 1902	1931, 1941
Aug–Dec 1903 5-Month	1.07	-0.02	1.09	103rd Driest	Driest since: 1901	1953
Aug–Dec 1903 5-Month	1.07	-0.02	1.09	28th Wettest	Wettest since: 1902	1902
Jul–Dec 1903 6-Month	0.91	0.01	0.90	97th Driest	Driest since: 1901	1953
Jul–Dec 1903 6-Month	0.91	0.01	0.90	34th Wettest	Wettest since: 1902	1902
Jun–Dec 1903 7-Month	0.77	0.02	0.75	92nd Driest	Driest since: 1901	1953
Jun–Dec 1903 7-Month	0.77	0.02	0.75	39th Wettest	Wettest since: 1902	1902
May–Dec 1903 8-Month	1.29	0.04	1.25	112th Driest	Driest since: 1901	1953
May–Dec 1903 8-Month	1.29	0.04	1.25	19th Wettest	Wettest since: 1902	1902
Apr–Dec 1903 9-Month	1.05	0.05	1.00	106th Driest	Driest since: 1901	1988
Apr–Dec 1903 9-Month	1.05	0.05	1.00	25th Wettest	Wettest since: 1902	2008
Mar–Dec 1903 10-Month	0.83	0.03	0.80	101st Driest	Driest since: 1901	1934
Mar–Dec 1903 10-Month	0.83	0.03	0.80	30th Wettest	Wettest since: 1902	1993
Feb–Dec 1903 11-Month	0.81	0.04	0.77	105th Driest	Driest since: 1901	1934
Feb–Dec 1903 11-Month	0.81	0.04	0.77	26th Wettest	Wettest since: 1902	2008
Jan–Dec 1903 12-Month	0.69	0.04	0.65	100th Driest	Driest since: 1901	1956
Jan–Dec 1903 12-Month	0.69	0.04	0.65	31st Wettest	Wettest since: 1902	1993
Jul 1902–Dec 1903 18-Month	1.55	0.04	1.51	123rd Driest	Driest since: 1902	1956
Jul 1902–Dec 1903 18-Month	1.55	0.04	1.51	7th Wettest	Wettest to Date	1993
Jan 1902–Dec 1903 24-Month	0.96	0.04	0.92	116th Driest	Driest since: 1902	1934
Jan 1902–Dec 1903 24-Month	0.96	0.04	0.92	14th Wettest	Wettest to Date	2009
Jan 1901–Dec 1903 36-Month	0.22	0.04	0.18	79th Driest	Driest since: 1902	1956
Jan 1901–Dec 1903 36-Month	0.22	0.04	0.18	50th Wettest	Wettest since: 1898	2010
Jan 1900–Dec 1903 48-Month	0.20	0.04	0.16	75th Driest	Driest since: 1902	1956
Jan 1900–Dec 1903 48-Month	0.20	0.04	0.16	53rd Wettest	Wettest since: 1898	2010
Jan 1899–Dec 1903 60-Month	0.09	0.04	0.05	65th Driest	Driest since: 1902	1957
Jan 1899–Dec 1903 60-Month	0.09	0.04	0.05	62nd Wettest	Wettest since: 1900	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 1903 Palmer Z-Index Rankings

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