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 9

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	3.56	-0.10	3.66	126th Driest	Driest since: 1919	2021
December 1920 1-Month	3.56	-0.10	3.66	5th Wettest	Wettest since: 1918	2009
Nov–Dec 1920 2-Month	2.00	-0.07	2.07	120th Driest	Driest since: 1919	1906
Nov–Dec 1920 2-Month	2.00	-0.07	2.07	11th Wettest	Wettest since: 1918	1947
Oct–Dec 1920 3-Month	1.47	0.01	1.46	117th Driest	Driest since: 1919	2011
Oct–Dec 1920 3-Month	1.47	0.01	1.46	14th Wettest	Wettest since: 1918	2009
Sep–Dec 1920 4-Month	1.29	-0.04	1.33	119th Driest	Driest since: 1919	1924
Sep–Dec 1920 4-Month	1.29	-0.04	1.33	12th Wettest	Wettest since: 1918	2002
Aug–Dec 1920 5-Month	1.22	-0.05	1.27	120th Driest	Driest since: 1919	1924
Aug–Dec 1920 5-Month	1.22	-0.05	1.27	11th Wettest	Wettest since: 1918	1977
Jul–Dec 1920 6-Month	1.38	-0.04	1.42	126th Driest	Driest since: 1919	1924
	1.38	-0.04	1.42	5th Wettest	Wettest since: 1905	1898
	Ties: 1905
Jun–Dec 1920 7-Month	1.36	-0.04	1.40	126th Driest	Driest since: 1919	1924
Jun–Dec 1920 7-Month	1.36	-0.04	1.40	5th Wettest	Wettest since: 1898	1898
May–Dec 1920 8-Month	1.24	-0.04	1.28	126th Driest	Driest since: 1919	1924
May–Dec 1920 8-Month	1.24	-0.04	1.28	5th Wettest	Wettest to Date	1942, 1975
Apr–Dec 1920 9-Month	1.08	-0.04	1.12	124th Driest	Driest since: 1919	1924
Apr–Dec 1920 9-Month	1.08	-0.04	1.12	7th Wettest	Wettest to Date	2021
Mar–Dec 1920 10-Month	0.86	-0.05	0.91	117th Driest	Driest since: 1919	1924
Mar–Dec 1920 10-Month	0.86	-0.05	0.91	14th Wettest	Wettest since: 1905	2021
Feb–Dec 1920 11-Month	0.72	-0.07	0.79	114th Driest	Driest since: 1919	2023
Feb–Dec 1920 11-Month	0.72	-0.07	0.79	17th Wettest	Wettest since: 1905	2021
Jan–Dec 1920 12-Month	0.73	-0.05	0.78	115th Driest	Driest since: 1919	2023
Jan–Dec 1920 12-Month	0.73	-0.05	0.78	16th Wettest	Wettest since: 1905	1991
Jul 1919–Dec 1920 18-Month	0.49	-0.04	0.53	111th Driest	Driest since: 1918	1904
Jul 1919–Dec 1920 18-Month	0.49	-0.04	0.53	19th Wettest	Wettest since: 1919	1946
Jan 1919–Dec 1920 24-Month	0.71	-0.04	0.75	125th Driest	Driest since: 1919	2000
Jan 1919–Dec 1920 24-Month	0.71	-0.04	0.75	5th Wettest	Wettest to Date	1992
Jan 1918–Dec 1920 36-Month	0.51	-0.04	0.55	121st Driest	Driest since: 1919	1904
Jan 1918–Dec 1920 36-Month	0.51	-0.04	0.55	8th Wettest	Wettest to Date	1993
Jan 1917–Dec 1920 48-Month	0.03	-0.03	0.06	76th Driest	Driest since: 1919	1904
Jan 1917–Dec 1920 48-Month	0.03	-0.03	0.06	52nd Wettest	Wettest since: 1914	1994
Jan 1916–Dec 1920 60-Month	-0.02	-0.03	0.01	75th Driest	Driest since: 1919	1906
Jan 1916–Dec 1920 60-Month	-0.02	-0.03	0.01	52nd Wettest	Wettest since: 1915	1995

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 28, 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 9

December 1920 Palmer Z-Index Rankings

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