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 1896 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1896 1-Month	0.11	0.05	0.06	70th Driest	Driest since: 1895	1976
December 1896 1-Month	0.11	0.05	0.06	61st Wettest	Wettest to Date	2015
Nov–Dec 1896 2-Month	1.40	0.10	1.30	110th Driest	Driest since: 1895	1976
Nov–Dec 1896 2-Month	1.40	0.10	1.30	21st Wettest	Wettest to Date	2015
Oct–Dec 1896 3-Month	1.82	0.11	1.71	115th Driest	Driest since: 1895	1955
Oct–Dec 1896 3-Month	1.82	0.11	1.71	16th Wettest	Wettest to Date	2015
Sep–Dec 1896 4-Month	1.84	0.14	1.70	115th Driest	Driest since: 1895	1939
Sep–Dec 1896 4-Month	1.84	0.14	1.70	16th Wettest	Wettest to Date	2015
Aug–Dec 1896 5-Month	1.45	0.12	1.33	107th Driest	Driest since: 1895	1976
Aug–Dec 1896 5-Month	1.45	0.12	1.33	24th Wettest	Wettest to Date	2015
Jul–Dec 1896 6-Month	1.92	0.13	1.79	116th Driest	Driest since: 1895	1976
Jul–Dec 1896 6-Month	1.92	0.13	1.79	15th Wettest	Wettest to Date	2015
Jun–Dec 1896 7-Month	1.54	0.13	1.41	112th Driest	Driest since: 1895	1976
Jun–Dec 1896 7-Month	1.54	0.13	1.41	19th Wettest	Wettest to Date	2015
May–Dec 1896 8-Month	1.80	0.13	1.67	118th Driest	Driest since: 1895	1936
May–Dec 1896 8-Month	1.80	0.13	1.67	13th Wettest	Wettest to Date	2015
Apr–Dec 1896 9-Month	1.94	0.13	1.81	122nd Driest	Driest since: 1895	1934
Apr–Dec 1896 9-Month	1.94	0.13	1.81	9th Wettest	Wettest to Date	2015
Mar–Dec 1896 10-Month	1.67	0.10	1.57	118th Driest	Driest since: 1895	1934
Mar–Dec 1896 10-Month	1.67	0.10	1.57	13th Wettest	Wettest to Date	2015
Feb–Dec 1896 11-Month	1.41	0.11	1.30	114th Driest	Driest since: 1895	1934
Feb–Dec 1896 11-Month	1.41	0.11	1.30	17th Wettest	Wettest to Date	2015
Jan–Dec 1896 12-Month	1.22	0.11	1.11	113th Driest	Driest since: 1895	1934
Jan–Dec 1896 12-Month	1.22	0.11	1.11	18th Wettest	Wettest to Date	2015
Jul 1895–Dec 1896 18-Month	0.67	0.13	0.54	96th Driest	Driest to Date	1956
Jul 1895–Dec 1896 18-Month	0.67	0.13	0.54	34th Wettest	Wettest to Date	2015
Jan 1895–Dec 1896 24-Month	0.46	0.12	0.34	86th Driest	Driest to Date	1934
Jan 1895–Dec 1896 24-Month	0.46	0.12	0.34	44th Wettest	Wettest to Date	2015

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 1896 Palmer Z-Index Rankings

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