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 2001 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2001 1-Month	0.92	-0.20	1.12	97th Driest	Driest since: 2000	2013
December 2001 1-Month	0.92	-0.20	1.12	34th Wettest	Wettest since: 1998	2015
Nov–Dec 2001 2-Month	0.87	-0.04	0.91	98th Driest	Driest since: 2000	2013
Nov–Dec 2001 2-Month	0.87	-0.04	0.91	33rd Wettest	Wettest since: 1998	1973
Oct–Dec 2001 3-Month	0.35	-0.11	0.46	92nd Driest	Driest since: 2000	2013
Oct–Dec 2001 3-Month	0.35	-0.11	0.46	39th Wettest	Wettest since: 1998	2016
Sep–Dec 2001 4-Month	-0.19	-0.05	-0.14	60th Driest	Driest since: 2000	1976
Sep–Dec 2001 4-Month	-0.19	-0.05	-0.14	71st Wettest	Wettest since: 1998	1973
Aug–Dec 2001 5-Month	0.08	-0.07	0.15	82nd Driest	Driest since: 2000	1936
	0.08	-0.07	0.15	49th Wettest	Wettest since: 1998	1968
	Ties: 1922, 1946
Jul–Dec 2001 6-Month	0.15	-0.07	0.22	92nd Driest	Driest since: 2000	2018
Jul–Dec 2001 6-Month	0.15	-0.07	0.22	39th Wettest	Wettest since: 1997	1920
Jun–Dec 2001 7-Month	0.28	-0.06	0.34	93rd Driest	Driest since: 2000	2018
Jun–Dec 2001 7-Month	0.28	-0.06	0.34	38th Wettest	Wettest since: 1997	1920
May–Dec 2001 8-Month	0.14	-0.05	0.19	87th Driest	Driest since: 2000	2018
May–Dec 2001 8-Month	0.14	-0.05	0.19	44th Wettest	Wettest since: 1998	1968
Apr–Dec 2001 9-Month	0.15	-0.03	0.18	87th Driest	Driest since: 2000	1938
	0.15	-0.03	0.18	44th Wettest	Wettest since: 1997	1937
	Ties: 1979
Mar–Dec 2001 10-Month	-0.14	-0.05	-0.09	63rd Driest	Driest since: 2000	1992
	-0.14	-0.05	-0.09	68th Wettest	Wettest since: 1998	1920, 1937
	Ties: 1922, 1979
Feb–Dec 2001 11-Month	-0.40	-0.04	-0.36	46th Driest	Driest since: 2000	2018
	-0.40	-0.04	-0.36	85th Wettest	Wettest since: 1999	1983
	Ties: 1908
Jan–Dec 2001 12-Month	-0.61	-0.04	-0.57	30th Driest	Driest since: 2000	1992
	-0.61	-0.04	-0.57	101st Wettest	Wettest since: 1999	1983
	Ties: 1949
Jul 2000–Dec 2001 18-Month	-0.80	-0.04	-0.76	11th Driest	Driest since: 1992	1992
Jul 2000–Dec 2001 18-Month	-0.80	-0.04	-0.76	119th Wettest	Wettest since: 2000	1983, 1996
Jan 2000–Dec 2001 24-Month	-0.64	-0.04	-0.60	12th Driest	Driest since: 1992	1930
	-0.64	-0.04	-0.60	118th Wettest	Wettest since: 2000	1984
	Ties: 1911, 1931
Jan 1999–Dec 2001 36-Month	-0.32	-0.03	-0.29	37th Driest	Driest since: 1994	1930
Jan 1999–Dec 2001 36-Month	-0.32	-0.03	-0.29	92nd Wettest	Wettest since: 2000	1997
Jan 1998–Dec 2001 48-Month	-0.14	-0.04	-0.10	54th Driest	Driest since: 1995	1926
Jan 1998–Dec 2001 48-Month	-0.14	-0.04	-0.10	74th Wettest	Wettest since: 2000	1998
Jan 1997–Dec 2001 60-Month	0.02	-0.04	0.06	76th Driest	Driest since: 1995	1926, 1932
	0.02	-0.04	0.06	51st Wettest	Wettest since: 2000	1999
	Ties: 1908, 1981

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 2001 Palmer Z-Index Rankings

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