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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.

Kentucky, Climate Division 4

January 1991 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 1991 1-Month	-0.75	0.14	-0.89	50th Driest	Driest since: 1990	1931
	-0.75	0.14	-0.89	82nd Wettest	Wettest since: 1989	1937
	Ties: 1921
Dec 1990–Jan 1991 2-Month	3.34	0.14	3.20	128th Driest	Driest since: 1990	1931
Dec 1990–Jan 1991 2-Month	3.34	0.14	3.20	3rd Wettest	Wettest since: 1979	1979
Nov 1990–Jan 1991 3-Month	1.90	0.08	1.82	122nd Driest	Driest since: 1990	1931
Nov 1990–Jan 1991 3-Month	1.90	0.08	1.82	9th Wettest	Wettest since: 1979	1952, 1979
Oct 1990–Jan 1991 4-Month	1.91	0.08	1.83	122nd Driest	Driest since: 1990	1931
Oct 1990–Jan 1991 4-Month	1.91	0.08	1.83	9th Wettest	Wettest since: 1979	1920
Sep 1990–Jan 1991 5-Month	1.48	0.04	1.44	122nd Driest	Driest since: 1990	1931
Sep 1990–Jan 1991 5-Month	1.48	0.04	1.44	9th Wettest	Wettest since: 1952	2019
Aug 1990–Jan 1991 6-Month	1.38	0.04	1.34	119th Driest	Driest since: 1989	1931
	1.38	0.04	1.34	12th Wettest	Wettest since: 1990	2019
	Ties: 1975
Jul 1990–Jan 1991 7-Month	1.06	0.00	1.06	112th Driest	Driest since: 1989	1931
Jul 1990–Jan 1991 7-Month	1.06	0.00	1.06	19th Wettest	Wettest since: 1990	2019
Jun 1990–Jan 1991 8-Month	0.90	0.04	0.86	102nd Driest	Driest since: 1989	1931
Jun 1990–Jan 1991 8-Month	0.90	0.04	0.86	29th Wettest	Wettest since: 1990	2019
May 1990–Jan 1991 9-Month	1.04	0.03	1.01	111th Driest	Driest since: 1989	1931
May 1990–Jan 1991 9-Month	1.04	0.03	1.01	20th Wettest	Wettest since: 1990	2019
Apr 1990–Jan 1991 10-Month	0.84	0.03	0.81	105th Driest	Driest since: 1989	1931
	0.84	0.03	0.81	26th Wettest	Wettest since: 1990	2019
	Ties: 1943
Mar 1990–Jan 1991 11-Month	0.58	0.04	0.54	92nd Driest	Driest since: 1989	1931
	0.58	0.04	0.54	39th Wettest	Wettest since: 1990	2019
	Ties: 1918, 1952
Feb 1990–Jan 1991 12-Month	0.61	0.02	0.59	100th Driest	Driest since: 1989	1931
Feb 1990–Jan 1991 12-Month	0.61	0.02	0.59	31st Wettest	Wettest since: 1990	2019
Aug 1989–Jan 1991 18-Month	0.88	0.03	0.85	113th Driest	Driest since: 1989	1931
Aug 1989–Jan 1991 18-Month	0.88	0.03	0.85	17th Wettest	Wettest since: 1990	2020
Feb 1989–Jan 1991 24-Month	1.09	0.03	1.06	124th Driest	Driest since: 1990	1932
Feb 1989–Jan 1991 24-Month	1.09	0.03	1.06	6th Wettest	Wettest to Date	2020
Feb 1988–Jan 1991 36-Month	0.53	0.03	0.50	108th Driest	Driest since: 1990	1955
Feb 1988–Jan 1991 36-Month	0.53	0.03	0.50	21st Wettest	Wettest since: 1980	2021
Feb 1987–Jan 1991 48-Month	0.17	0.03	0.14	70th Driest	Driest since: 1990	1956
Feb 1987–Jan 1991 48-Month	0.17	0.03	0.14	58th Wettest	Wettest since: 1981	2022
Feb 1986–Jan 1991 60-Month	0.02	0.03	-0.01	57th Driest	Driest since: 1990	1935
Feb 1986–Jan 1991 60-Month	0.02	0.03	-0.01	70th Wettest	Wettest since: 1983	2022, 2023

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 29, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Kentucky, Climate Division 4

January 1991 Palmer Z-Index Rankings

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