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 1934 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1934 1-Month	-1.78	0.05	-1.83	5th Driest	Driest to Date	1976
December 1934 1-Month	-1.78	0.05	-1.83	126th Wettest	Wettest since: 1933	2015
Nov–Dec 1934 2-Month	-0.51	0.10	-0.61	46th Driest	Driest since: 1933	1976
Nov–Dec 1934 2-Month	-0.51	0.10	-0.61	85th Wettest	Wettest since: 1932	2015
Oct–Dec 1934 3-Month	-0.90	0.11	-1.01	28th Driest	Driest since: 1933	1955
	-0.90	0.11	-1.01	103rd Wettest	Wettest since: 1932	2015
	Ties: 1904
Sep–Dec 1934 4-Month	-0.81	0.14	-0.95	32nd Driest	Driest since: 1933	1939
Sep–Dec 1934 4-Month	-0.81	0.14	-0.95	99th Wettest	Wettest since: 1932	2015
Aug–Dec 1934 5-Month	-1.23	0.12	-1.35	19th Driest	Driest since: 1933	1976
Aug–Dec 1934 5-Month	-1.23	0.12	-1.35	112th Wettest	Wettest since: 1932	2015
Jul–Dec 1934 6-Month	-1.36	0.13	-1.49	15th Driest	Driest since: 1933	1976
Jul–Dec 1934 6-Month	-1.36	0.13	-1.49	116th Wettest	Wettest since: 1932	2015
Jun–Dec 1934 7-Month	-1.54	0.13	-1.67	10th Driest	Driest since: 1933	1976
	-1.54	0.13	-1.67	121st Wettest	Wettest since: 1932	2015
	Ties: 1930
May–Dec 1934 8-Month	-2.11	0.13	-2.24	5th Driest	Driest since: 1933	1936
May–Dec 1934 8-Month	-2.11	0.13	-2.24	126th Wettest	Wettest since: 1932	2015
Apr–Dec 1934 9-Month	-2.25	0.13	-2.38	1st Driest	Driest to Date	1934
Apr–Dec 1934 9-Month	-2.25	0.13	-2.38	130th Wettest	Wettest since: 1933	2015
Mar–Dec 1934 10-Month	-2.23	0.10	-2.33	1st Driest	Driest to Date	1934
Mar–Dec 1934 10-Month	-2.23	0.10	-2.33	130th Wettest	Wettest since: 1933	2015
Feb–Dec 1934 11-Month	-2.19	0.11	-2.30	1st Driest	Driest to Date	1934
Feb–Dec 1934 11-Month	-2.19	0.11	-2.30	130th Wettest	Wettest since: 1933	2015
Jan–Dec 1934 12-Month	-2.12	0.11	-2.23	1st Driest	Driest to Date	1934
Jan–Dec 1934 12-Month	-2.12	0.11	-2.23	130th Wettest	Wettest since: 1933	2015
Jul 1933–Dec 1934 18-Month	-1.92	0.13	-2.05	2nd Driest	Driest to Date	1956
Jul 1933–Dec 1934 18-Month	-1.92	0.13	-2.05	128th Wettest	Wettest since: 1933	2015
Jan 1933–Dec 1934 24-Month	-1.84	0.12	-1.96	1st Driest	Driest to Date	1934
Jan 1933–Dec 1934 24-Month	-1.84	0.12	-1.96	129th Wettest	Wettest since: 1933	2015
Jan 1932–Dec 1934 36-Month	-1.14	0.12	-1.26	3rd Driest	Driest to Date	1936
Jan 1932–Dec 1934 36-Month	-1.14	0.12	-1.26	126th Wettest	Wettest since: 1933	2009
Jan 1931–Dec 1934 48-Month	-0.92	0.12	-1.04	6th Driest	Driest to Date	1936
Jan 1931–Dec 1934 48-Month	-0.92	0.12	-1.04	122nd Wettest	Wettest since: 1933	2010
Jan 1930–Dec 1934 60-Month	-0.96	0.11	-1.07	4th Driest	Driest to Date	1937
Jan 1930–Dec 1934 60-Month	-0.96	0.11	-1.07	123rd Wettest	Wettest since: 1933	2018

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 1934 Palmer Z-Index Rankings

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