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.

Oregon, Climate Division 1

December 1965 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1965 1-Month	0.37	-0.20	0.57	81st Driest	Driest since: 1963	2013
December 1965 1-Month	0.37	-0.20	0.57	50th Wettest	Wettest since: 1964	2015
Nov–Dec 1965 2-Month	1.02	-0.04	1.06	106th Driest	Driest since: 1963	2013
Nov–Dec 1965 2-Month	1.02	-0.04	1.06	25th Wettest	Wettest since: 1964	1973
Oct–Dec 1965 3-Month	0.10	-0.11	0.21	81st Driest	Driest since: 1963	2013
	0.10	-0.11	0.21	50th Wettest	Wettest since: 1964	2016
	Ties: 1904
Sep–Dec 1965 4-Month	-0.55	-0.05	-0.50	35th Driest	Driest since: 1952	1976
Sep–Dec 1965 4-Month	-0.55	-0.05	-0.50	96th Wettest	Wettest since: 1964	1973
Aug–Dec 1965 5-Month	-0.51	-0.07	-0.44	38th Driest	Driest since: 1958	1936
	-0.51	-0.07	-0.44	93rd Wettest	Wettest since: 1964	1968
	Ties: 1904
Jul–Dec 1965 6-Month	-0.56	-0.07	-0.49	39th Driest	Driest since: 1960	2018
Jul–Dec 1965 6-Month	-0.56	-0.07	-0.49	92nd Wettest	Wettest since: 1964	1920
Jun–Dec 1965 7-Month	-0.65	-0.06	-0.59	32nd Driest	Driest since: 1960	2018
	-0.65	-0.06	-0.59	99th Wettest	Wettest since: 1964	1920
	Ties: 1929, 1932
May–Dec 1965 8-Month	-0.65	-0.05	-0.60	29th Driest	Driest since: 1958	2018
May–Dec 1965 8-Month	-0.65	-0.05	-0.60	102nd Wettest	Wettest since: 1964	1968
Apr–Dec 1965 9-Month	-0.53	-0.03	-0.50	34th Driest	Driest since: 1958	1938
Apr–Dec 1965 9-Month	-0.53	-0.03	-0.50	97th Wettest	Wettest since: 1964	1937
Mar–Dec 1965 10-Month	-0.97	-0.05	-0.92	11th Driest	Driest since: 1939	1992
Mar–Dec 1965 10-Month	-0.97	-0.05	-0.92	120th Wettest	Wettest since: 1964	1920, 1937
Feb–Dec 1965 11-Month	-1.12	-0.04	-1.08	4th Driest	Driest since: 1935	2018
Feb–Dec 1965 11-Month	-1.12	-0.04	-1.08	127th Wettest	Wettest since: 1964	1983
Jan–Dec 1965 12-Month	-0.87	-0.04	-0.83	11th Driest	Driest since: 1944	1992
	-0.87	-0.04	-0.83	120th Wettest	Wettest since: 1964	1983
	Ties: 1944
Jul 1964–Dec 1965 18-Month	-0.27	-0.04	-0.23	48th Driest	Driest since: 1962	1992
	-0.27	-0.04	-0.23	82nd Wettest	Wettest since: 1964	1983, 1996
	Ties: 1959
Jan 1964–Dec 1965 24-Month	-0.28	-0.04	-0.24	45th Driest	Driest since: 1952	1930
	-0.28	-0.04	-0.24	85th Wettest	Wettest since: 1964	1984
	Ties: 1906, 1928
Jan 1963–Dec 1965 36-Month	-0.03	-0.03	0.00	65th Driest	Driest since: 1959	1930
Jan 1963–Dec 1965 36-Month	-0.03	-0.03	0.00	64th Wettest	Wettest since: 1964	1997
Jan 1962–Dec 1965 48-Month	-0.07	-0.04	-0.03	72nd Driest	Driest since: 1959	1926
Jan 1962–Dec 1965 48-Month	-0.07	-0.04	-0.03	56th Wettest	Wettest since: 1964	1998
Jan 1961–Dec 1965 60-Month	0.03	-0.04	0.07	78th Driest	Driest since: 1960	1926, 1932
Jan 1961–Dec 1965 60-Month	0.03	-0.04	0.07	49th Wettest	Wettest since: 1964	1999

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

Oregon, Climate Division 1

December 1965 Palmer Z-Index Rankings

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