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.

Kentucky, Climate Division 1

December 1939 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1939 1-Month	-2.62	-0.05	-2.57	7th Driest	Driest since: 1930	1963
December 1939 1-Month	-2.62	-0.05	-2.57	124th Wettest	Wettest since: 1938	1990
Nov–Dec 1939 2-Month	-2.76	-0.15	-2.61	4th Driest	Driest since: 1930	1930
Nov–Dec 1939 2-Month	-2.76	-0.15	-2.61	127th Wettest	Wettest since: 1938	1957
Oct–Dec 1939 3-Month	-2.46	-0.07	-2.39	4th Driest	Driest since: 1930	1963
Oct–Dec 1939 3-Month	-2.46	-0.07	-2.39	127th Wettest	Wettest since: 1938	2001
Sep–Dec 1939 4-Month	-2.75	-0.07	-2.68	3rd Driest	Driest to Date	1963
Sep–Dec 1939 4-Month	-2.75	-0.07	-2.68	128th Wettest	Wettest since: 1938	2006
Aug–Dec 1939 5-Month	-2.43	-0.07	-2.36	2nd Driest	Driest to Date	1953
Aug–Dec 1939 5-Month	-2.43	-0.07	-2.36	129th Wettest	Wettest since: 1938	2006
Jul–Dec 1939 6-Month	-2.18	-0.09	-2.09	3rd Driest	Driest since: 1930	1953
Jul–Dec 1939 6-Month	-2.18	-0.09	-2.09	128th Wettest	Wettest since: 1938	1979
Jun–Dec 1939 7-Month	-1.78	-0.06	-1.72	7th Driest	Driest since: 1930	1953
Jun–Dec 1939 7-Month	-1.78	-0.06	-1.72	124th Wettest	Wettest since: 1938	1979
May–Dec 1939 8-Month	-1.82	-0.06	-1.76	5th Driest	Driest since: 1930	1930
May–Dec 1939 8-Month	-1.82	-0.06	-1.76	126th Wettest	Wettest since: 1938	1979
Apr–Dec 1939 9-Month	-1.34	-0.05	-1.29	9th Driest	Driest since: 1936	1930
Apr–Dec 1939 9-Month	-1.34	-0.05	-1.29	122nd Wettest	Wettest since: 1938	1979
Mar–Dec 1939 10-Month	-1.18	-0.07	-1.11	13th Driest	Driest since: 1936	1930
	-1.18	-0.07	-1.11	118th Wettest	Wettest since: 1938	1979
	Ties: 1914
Feb–Dec 1939 11-Month	-0.72	-0.08	-0.64	25th Driest	Driest since: 1936	1930
	-0.72	-0.08	-0.64	106th Wettest	Wettest since: 1938	1979
	Ties: 1908
Jan–Dec 1939 12-Month	-0.53	-0.06	-0.47	33rd Driest	Driest since: 1936	1930
Jan–Dec 1939 12-Month	-0.53	-0.06	-0.47	98th Wettest	Wettest since: 1938	1979
Jul 1938–Dec 1939 18-Month	-0.33	-0.07	-0.26	37th Driest	Driest since: 1936	1931
	-0.33	-0.07	-0.26	93rd Wettest	Wettest since: 1938	1979
	Ties: 1897, 1900
Jan 1938–Dec 1939 24-Month	-0.31	-0.06	-0.25	34th Driest	Driest since: 1937	1931
Jan 1938–Dec 1939 24-Month	-0.31	-0.06	-0.25	96th Wettest	Wettest since: 1938	1950
Jan 1937–Dec 1939 36-Month	-0.05	-0.06	0.01	52nd Driest	Driest since: 1938	1954
Jan 1937–Dec 1939 36-Month	-0.05	-0.06	0.01	77th Wettest	Wettest since: 1935	1951
Jan 1936–Dec 1939 48-Month	-0.41	-0.05	-0.36	20th Driest	Driest since: 1933	1944
Jan 1936–Dec 1939 48-Month	-0.41	-0.05	-0.36	108th Wettest	Wettest since: 1938	1951
Jan 1935–Dec 1939 60-Month	-0.24	-0.05	-0.19	30th Driest	Driest since: 1938	1944
	-0.24	-0.05	-0.19	97th Wettest	Wettest since: 1937	2019, 2020
	Ties: 1916

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

Kentucky, Climate Division 1

December 1939 Palmer Z-Index Rankings

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