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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 1989 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1989 1-Month	0.79	-0.10	0.89	97th Driest	Driest since: 1988	2021
December 1989 1-Month	0.79	-0.10	0.89	34th Wettest	Wettest since: 1983	2009
Nov–Dec 1989 2-Month	2.07	-0.07	2.14	123rd Driest	Driest since: 1988	1906
	2.07	-0.07	2.14	8th Wettest	Wettest since: 1982	1947
	Ties: 1982
Oct–Dec 1989 3-Month	1.08	0.01	1.07	106th Driest	Driest since: 1988	2011
Oct–Dec 1989 3-Month	1.08	0.01	1.07	25th Wettest	Wettest since: 1985	2009
Sep–Dec 1989 4-Month	0.59	-0.04	0.63	98th Driest	Driest since: 1988	1924
Sep–Dec 1989 4-Month	0.59	-0.04	0.63	33rd Wettest	Wettest since: 1985	2002
Aug–Dec 1989 5-Month	0.14	-0.05	0.19	80th Driest	Driest since: 1987	1924
Aug–Dec 1989 5-Month	0.14	-0.05	0.19	51st Wettest	Wettest since: 1988	1977
Jul–Dec 1989 6-Month	0.31	-0.04	0.35	92nd Driest	Driest since: 1988	1924
Jul–Dec 1989 6-Month	0.31	-0.04	0.35	39th Wettest	Wettest since: 1985	1898
Jun–Dec 1989 7-Month	0.53	-0.04	0.57	96th Driest	Driest since: 1988	1924
Jun–Dec 1989 7-Month	0.53	-0.04	0.57	35th Wettest	Wettest since: 1985	1898
May–Dec 1989 8-Month	0.40	-0.04	0.44	88th Driest	Driest since: 1988	1924
May–Dec 1989 8-Month	0.40	-0.04	0.44	43rd Wettest	Wettest since: 1983	1942, 1975
Apr–Dec 1989 9-Month	0.25	-0.04	0.29	77th Driest	Driest since: 1987	1924
Apr–Dec 1989 9-Month	0.25	-0.04	0.29	54th Wettest	Wettest since: 1988	2021
Mar–Dec 1989 10-Month	0.16	-0.05	0.21	79th Driest	Driest since: 1987	1924
	0.16	-0.05	0.21	52nd Wettest	Wettest since: 1988	2021
	Ties: 1909, 1982
Feb–Dec 1989 11-Month	-0.13	-0.07	-0.06	60th Driest	Driest since: 1986	2023
Feb–Dec 1989 11-Month	-0.13	-0.07	-0.06	71st Wettest	Wettest since: 1988	2021
Jan–Dec 1989 12-Month	-0.30	-0.05	-0.25	46th Driest	Driest since: 1986	2023
Jan–Dec 1989 12-Month	-0.30	-0.05	-0.25	85th Wettest	Wettest since: 1988	1991
Jul 1988–Dec 1989 18-Month	-0.12	-0.04	-0.08	57th Driest	Driest since: 1986	1904
Jul 1988–Dec 1989 18-Month	-0.12	-0.04	-0.08	73rd Wettest	Wettest since: 1988	1946
Jan 1988–Dec 1989 24-Month	0.21	-0.04	0.25	88th Driest	Driest since: 1987	2000
Jan 1988–Dec 1989 24-Month	0.21	-0.04	0.25	42nd Wettest	Wettest since: 1988	1992
Jan 1987–Dec 1989 36-Month	0.21	-0.04	0.25	101st Driest	Driest since: 1988	1904
	0.21	-0.04	0.25	28th Wettest	Wettest since: 1985	1993
	Ties: 1958, 1985
Jan 1986–Dec 1989 48-Month	-0.05	-0.03	-0.02	66th Driest	Driest since: 1987	1904
	-0.05	-0.03	-0.02	62nd Wettest	Wettest since: 1988	1994
	Ties: 1901, 1986
Jan 1985–Dec 1989 60-Month	-0.01	-0.03	0.02	77th Driest	Driest since: 1988	1906
	-0.01	-0.03	0.02	50th Wettest	Wettest since: 1987	1995
	Ties: 1914

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 1989 Palmer Z-Index Rankings

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