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.

Louisiana, Climate Division 1

December 1920 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1920 1-Month	0.32	0.10	0.22	82nd Driest	Driest since: 1919	2010
December 1920 1-Month	0.32	0.10	0.22	49th Wettest	Wettest since: 1914	1931
Nov–Dec 1920 2-Month	0.29	-0.03	0.32	82nd Driest	Driest since: 1919	1981
Nov–Dec 1920 2-Month	0.29	-0.03	0.32	49th Wettest	Wettest since: 1914	1940
Oct–Dec 1920 3-Month	0.23	-0.02	0.25	80th Driest	Driest since: 1917	2005
Oct–Dec 1920 3-Month	0.23	-0.02	0.25	51st Wettest	Wettest since: 1919	2018
Sep–Dec 1920 4-Month	0.13	0.00	0.13	78th Driest	Driest since: 1918	1924
Sep–Dec 1920 4-Month	0.13	0.00	0.13	53rd Wettest	Wettest since: 1919	2018
Aug–Dec 1920 5-Month	0.58	0.05	0.53	91st Driest	Driest since: 1918	1924
Aug–Dec 1920 5-Month	0.58	0.05	0.53	40th Wettest	Wettest since: 1919	2009
Jul–Dec 1920 6-Month	1.01	0.07	0.94	112th Driest	Driest since: 1918	1924
Jul–Dec 1920 6-Month	1.01	0.07	0.94	19th Wettest	Wettest since: 1919	2009
Jun–Dec 1920 7-Month	0.87	0.06	0.81	107th Driest	Driest since: 1918	1924
	0.87	0.06	0.81	24th Wettest	Wettest since: 1919	1961
	Ties: 1906
May–Dec 1920 8-Month	0.71	0.04	0.67	103rd Driest	Driest since: 1918	2010
May–Dec 1920 8-Month	0.71	0.04	0.67	28th Wettest	Wettest since: 1919	2009
Apr–Dec 1920 9-Month	0.78	0.07	0.71	107th Driest	Driest since: 1918	2010
Apr–Dec 1920 9-Month	0.78	0.07	0.71	24th Wettest	Wettest since: 1919	1905
Mar–Dec 1920 10-Month	0.74	0.08	0.66	101st Driest	Driest since: 1918	2010
Mar–Dec 1920 10-Month	0.74	0.08	0.66	30th Wettest	Wettest since: 1919	1905
Feb–Dec 1920 11-Month	0.44	0.05	0.39	91st Driest	Driest since: 1918	2010, 2011
Feb–Dec 1920 11-Month	0.44	0.05	0.39	40th Wettest	Wettest since: 1919	1905
Jan–Dec 1920 12-Month	0.59	0.04	0.55	98th Driest	Driest since: 1918	2010
Jan–Dec 1920 12-Month	0.59	0.04	0.55	33rd Wettest	Wettest since: 1919	1905
Jul 1919–Dec 1920 18-Month	0.83	0.05	0.78	118th Driest	Driest since: 1919	2011
Jul 1919–Dec 1920 18-Month	0.83	0.05	0.78	12th Wettest	Wettest since: 1905	1997
Jan 1919–Dec 1920 24-Month	0.75	0.04	0.71	116th Driest	Driest since: 1919	2011
Jan 1919–Dec 1920 24-Month	0.75	0.04	0.71	14th Wettest	Wettest since: 1906	1974
Jan 1918–Dec 1920 36-Month	0.18	0.04	0.14	79th Driest	Driest since: 1919	2012
Jan 1918–Dec 1920 36-Month	0.18	0.04	0.14	50th Wettest	Wettest since: 1915	1991
Jan 1917–Dec 1920 48-Month	-0.02	0.04	-0.06	56th Driest	Driest since: 1919	1954, 1965
Jan 1917–Dec 1920 48-Month	-0.02	0.04	-0.06	72nd Wettest	Wettest since: 1916	1992
Jan 1916–Dec 1920 60-Month	-0.16	0.03	-0.19	36th Driest	Driest since: 1919	1967
Jan 1916–Dec 1920 60-Month	-0.16	0.03	-0.19	91st Wettest	Wettest since: 1917	1993

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

Louisiana, Climate Division 1

December 1920 Palmer Z-Index Rankings

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