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 1899 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1899 1-Month	-0.25	-0.20	-0.05	63rd Driest	Driest since: 1898	2013
December 1899 1-Month	-0.25	-0.20	-0.05	68th Wettest	Wettest since: 1897	2015
Nov–Dec 1899 2-Month	0.58	-0.04	0.62	90th Driest	Driest since: 1898	2013
Nov–Dec 1899 2-Month	0.58	-0.04	0.62	41st Wettest	Wettest since: 1897	1973
Oct–Dec 1899 3-Month	0.85	-0.11	0.96	108th Driest	Driest since: 1898	2013
Oct–Dec 1899 3-Month	0.85	-0.11	0.96	23rd Wettest	Wettest since: 1896	2016
Sep–Dec 1899 4-Month	0.72	-0.05	0.77	111th Driest	Driest since: 1898	1976
Sep–Dec 1899 4-Month	0.72	-0.05	0.77	20th Wettest	Wettest since: 1896	1973
Aug–Dec 1899 5-Month	1.22	-0.07	1.29	123rd Driest	Driest since: 1898	1936
Aug–Dec 1899 5-Month	1.22	-0.07	1.29	8th Wettest	Wettest to Date	1968
Jul–Dec 1899 6-Month	0.89	-0.07	0.96	116th Driest	Driest since: 1898	2018
Jul–Dec 1899 6-Month	0.89	-0.07	0.96	15th Wettest	Wettest to Date	1920
Jun–Dec 1899 7-Month	0.65	-0.06	0.71	111th Driest	Driest since: 1898	2018
Jun–Dec 1899 7-Month	0.65	-0.06	0.71	20th Wettest	Wettest to Date	1920
May–Dec 1899 8-Month	0.84	-0.05	0.89	113th Driest	Driest since: 1898	2018
May–Dec 1899 8-Month	0.84	-0.05	0.89	18th Wettest	Wettest since: 1896	1968
Apr–Dec 1899 9-Month	0.97	-0.03	1.00	117th Driest	Driest since: 1898	1938
Apr–Dec 1899 9-Month	0.97	-0.03	1.00	14th Wettest	Wettest since: 1896	1937
Mar–Dec 1899 10-Month	0.85	-0.05	0.90	116th Driest	Driest since: 1898	1992
Mar–Dec 1899 10-Month	0.85	-0.05	0.90	15th Wettest	Wettest since: 1896	1920, 1937
Feb–Dec 1899 11-Month	0.80	-0.04	0.84	117th Driest	Driest since: 1898	2018
Feb–Dec 1899 11-Month	0.80	-0.04	0.84	14th Wettest	Wettest since: 1896	1983
Jan–Dec 1899 12-Month	0.76	-0.04	0.80	117th Driest	Driest since: 1898	1992
Jan–Dec 1899 12-Month	0.76	-0.04	0.80	14th Wettest	Wettest since: 1896	1983
Jul 1898–Dec 1899 18-Month	0.46	-0.04	0.50	112th Driest	Driest since: 1898	1992
Jul 1898–Dec 1899 18-Month	0.46	-0.04	0.50	18th Wettest	Wettest since: 1896	1983, 1996
Jan 1898–Dec 1899 24-Month	0.10	-0.04	0.14	85th Driest	Driest since: 1898	1930
Jan 1898–Dec 1899 24-Month	0.10	-0.04	0.14	45th Wettest	Wettest since: 1897	1984
Jan 1897–Dec 1899 36-Month	0.12	-0.03	0.15	89th Driest	Driest to Date	1930
Jan 1897–Dec 1899 36-Month	0.12	-0.03	0.15	40th Wettest	Wettest since: 1898	1997
Jan 1896–Dec 1899 48-Month	0.37	-0.04	0.41	116th Driest	Driest since: 1898	1926
Jan 1896–Dec 1899 48-Month	0.37	-0.04	0.41	12th Wettest	Wettest to Date	1998
Jan 1895–Dec 1899 60-Month	0.28	-0.04	0.32	109th Driest	Driest to Date	1926, 1932
Jan 1895–Dec 1899 60-Month	0.28	-0.04	0.32	18th Wettest	Wettest to Date	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 1899 Palmer Z-Index Rankings

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