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.

South Dakota, Climate Division 8

December 1921 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1921 1-Month	0.10	0.18	-0.08	70th Driest	Driest since: 1912	1943
December 1921 1-Month	0.10	0.18	-0.08	61st Wettest	Wettest since: 1920	1951
Nov–Dec 1921 2-Month	0.02	0.14	-0.12	66th Driest	Driest since: 1917	1912
Nov–Dec 1921 2-Month	0.02	0.14	-0.12	65th Wettest	Wettest since: 1920	1920, 2019
Oct–Dec 1921 3-Month	0.24	0.24	0.00	75th Driest	Driest since: 1917	1938
Oct–Dec 1921 3-Month	0.24	0.24	0.00	56th Wettest	Wettest since: 1920	1998
Sep–Dec 1921 4-Month	0.75	0.23	0.52	97th Driest	Driest since: 1918	1933
Sep–Dec 1921 4-Month	0.75	0.23	0.52	34th Wettest	Wettest since: 1920	2019
Aug–Dec 1921 5-Month	0.87	0.25	0.62	91st Driest	Driest since: 1918	2012
Aug–Dec 1921 5-Month	0.87	0.25	0.62	40th Wettest	Wettest since: 1920	2019
Jul–Dec 1921 6-Month	1.04	0.30	0.74	92nd Driest	Driest since: 1918	2012
Jul–Dec 1921 6-Month	1.04	0.30	0.74	39th Wettest	Wettest since: 1920	2019
Jun–Dec 1921 7-Month	0.54	0.29	0.25	78th Driest	Driest since: 1918	2012
Jun–Dec 1921 7-Month	0.54	0.29	0.25	53rd Wettest	Wettest since: 1920	2019
May–Dec 1921 8-Month	0.70	0.28	0.42	85th Driest	Driest since: 1918	2012
May–Dec 1921 8-Month	0.70	0.28	0.42	46th Wettest	Wettest since: 1920	2019
Apr–Dec 1921 9-Month	0.50	0.28	0.22	77th Driest	Driest since: 1918	1934
	0.50	0.28	0.22	54th Wettest	Wettest since: 1920	2019
	Ties: 1901
Mar–Dec 1921 10-Month	0.44	0.23	0.21	77th Driest	Driest since: 1918	2012
Mar–Dec 1921 10-Month	0.44	0.23	0.21	54th Wettest	Wettest since: 1920	2019
Feb–Dec 1921 11-Month	0.38	0.22	0.16	74th Driest	Driest since: 1918	1934
Feb–Dec 1921 11-Month	0.38	0.22	0.16	57th Wettest	Wettest since: 1920	2019
Jan–Dec 1921 12-Month	0.40	0.22	0.18	76th Driest	Driest since: 1918	1934
Jan–Dec 1921 12-Month	0.40	0.22	0.18	55th Wettest	Wettest since: 1920	2019
Jul 1920–Dec 1921 18-Month	0.71	0.25	0.46	84th Driest	Driest since: 1918	1934
Jul 1920–Dec 1921 18-Month	0.71	0.25	0.46	46th Wettest	Wettest since: 1920	2019
Jan 1920–Dec 1921 24-Month	1.21	0.22	0.99	113th Driest	Driest since: 1919	1934
Jan 1920–Dec 1921 24-Month	1.21	0.22	0.99	17th Wettest	Wettest since: 1920	2019
Jan 1919–Dec 1921 36-Month	1.17	0.21	0.96	115th Driest	Driest since: 1920	1935
Jan 1919–Dec 1921 36-Month	1.17	0.21	0.96	14th Wettest	Wettest since: 1917	2020
Jan 1918–Dec 1921 48-Month	0.94	0.20	0.74	111th Driest	Driest since: 1920	1936
Jan 1918–Dec 1921 48-Month	0.94	0.20	0.74	17th Wettest	Wettest since: 1918	1998
Jan 1917–Dec 1921 60-Month	0.80	0.19	0.61	104th Driest	Driest since: 1917	1937
Jan 1917–Dec 1921 60-Month	0.80	0.19	0.61	23rd Wettest	Wettest since: 1920	1999

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

South Dakota, Climate Division 8

December 1921 Palmer Z-Index Rankings

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