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 1966 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1966 1-Month	0.54	-0.20	0.74	85th Driest	Driest since: 1965	2013
December 1966 1-Month	0.54	-0.20	0.74	46th Wettest	Wettest since: 1964	2015
Nov–Dec 1966 2-Month	0.66	-0.04	0.70	94th Driest	Driest since: 1963	2013
Nov–Dec 1966 2-Month	0.66	-0.04	0.70	37th Wettest	Wettest since: 1965	1973
Oct–Dec 1966 3-Month	0.14	-0.11	0.25	83rd Driest	Driest since: 1965	2013
Oct–Dec 1966 3-Month	0.14	-0.11	0.25	48th Wettest	Wettest since: 1964	2016
Sep–Dec 1966 4-Month	0.05	-0.05	0.10	74th Driest	Driest since: 1965	1976
Sep–Dec 1966 4-Month	0.05	-0.05	0.10	57th Wettest	Wettest since: 1964	1973
Aug–Dec 1966 5-Month	-0.16	-0.07	-0.09	70th Driest	Driest since: 1965	1936
	-0.16	-0.07	-0.09	61st Wettest	Wettest since: 1964	1968
	Ties: 1901
Jul–Dec 1966 6-Month	-0.18	-0.07	-0.11	67th Driest	Driest since: 1965	2018
Jul–Dec 1966 6-Month	-0.18	-0.07	-0.11	64th Wettest	Wettest since: 1964	1920
Jun–Dec 1966 7-Month	-0.35	-0.06	-0.29	51st Driest	Driest since: 1965	2018
Jun–Dec 1966 7-Month	-0.35	-0.06	-0.29	80th Wettest	Wettest since: 1964	1920
May–Dec 1966 8-Month	-0.57	-0.05	-0.52	34th Driest	Driest since: 1965	2018
May–Dec 1966 8-Month	-0.57	-0.05	-0.52	97th Wettest	Wettest since: 1964	1968
Apr–Dec 1966 9-Month	-0.78	-0.03	-0.75	18th Driest	Driest since: 1952	1938
Apr–Dec 1966 9-Month	-0.78	-0.03	-0.75	113th Wettest	Wettest since: 1965	1937
Mar–Dec 1966 10-Month	-0.44	-0.05	-0.39	44th Driest	Driest since: 1965	1992
Mar–Dec 1966 10-Month	-0.44	-0.05	-0.39	87th Wettest	Wettest since: 1964	1920, 1937
Feb–Dec 1966 11-Month	-0.57	-0.04	-0.53	34th Driest	Driest since: 1965	2018
Feb–Dec 1966 11-Month	-0.57	-0.04	-0.53	97th Wettest	Wettest since: 1964	1983
Jan–Dec 1966 12-Month	-0.44	-0.04	-0.40	46th Driest	Driest since: 1965	1992
Jan–Dec 1966 12-Month	-0.44	-0.04	-0.40	85th Wettest	Wettest since: 1964	1983
Jul 1965–Dec 1966 18-Month	-0.48	-0.04	-0.44	33rd Driest	Driest since: 1944	1992
Jul 1965–Dec 1966 18-Month	-0.48	-0.04	-0.44	97th Wettest	Wettest since: 1965	1983, 1996
Jan 1965–Dec 1966 24-Month	-0.65	-0.04	-0.61	11th Driest	Driest since: 1939	1930
Jan 1965–Dec 1966 24-Month	-0.65	-0.04	-0.61	119th Wettest	Wettest since: 1965	1984
Jan 1964–Dec 1966 36-Month	-0.34	-0.03	-0.31	34th Driest	Driest since: 1941	1930
Jan 1964–Dec 1966 36-Month	-0.34	-0.03	-0.31	95th Wettest	Wettest since: 1965	1997
Jan 1963–Dec 1966 48-Month	-0.13	-0.04	-0.09	55th Driest	Driest since: 1952	1926
	-0.13	-0.04	-0.09	73rd Wettest	Wettest since: 1965	1998
	Ties: 1952
Jan 1962–Dec 1966 60-Month	-0.15	-0.04	-0.11	52nd Driest	Driest since: 1944	1926, 1932
Jan 1962–Dec 1966 60-Month	-0.15	-0.04	-0.11	75th Wettest	Wettest since: 1965	1999

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

Oregon, Climate Division 1

December 1966 Palmer Z-Index Rankings

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