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 1948 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1948 1-Month	0.93	-0.20	1.13	98th Driest	Driest since: 1947	2013
December 1948 1-Month	0.93	-0.20	1.13	33rd Wettest	Wettest since: 1942	2015
Nov–Dec 1948 2-Month	0.41	-0.04	0.45	82nd Driest	Driest since: 1947	2013
Nov–Dec 1948 2-Month	0.41	-0.04	0.45	49th Wettest	Wettest since: 1945	1973
Oct–Dec 1948 3-Month	-0.06	-0.11	0.05	73rd Driest	Driest since: 1944	2013
Oct–Dec 1948 3-Month	-0.06	-0.11	0.05	58th Wettest	Wettest since: 1947	2016
Sep–Dec 1948 4-Month	0.32	-0.05	0.37	89th Driest	Driest since: 1944	1976
Sep–Dec 1948 4-Month	0.32	-0.05	0.37	42nd Wettest	Wettest since: 1947	1973
Aug–Dec 1948 5-Month	0.38	-0.07	0.45	102nd Driest	Driest since: 1946	1936
	0.38	-0.07	0.45	29th Wettest	Wettest since: 1947	1968
	Ties: 1902
Jul–Dec 1948 6-Month	0.39	-0.07	0.46	102nd Driest	Driest since: 1946	2018
Jul–Dec 1948 6-Month	0.39	-0.07	0.46	29th Wettest	Wettest since: 1947	1920
Jun–Dec 1948 7-Month	0.16	-0.06	0.22	88th Driest	Driest since: 1945	2018
Jun–Dec 1948 7-Month	0.16	-0.06	0.22	43rd Wettest	Wettest since: 1947	1920
May–Dec 1948 8-Month	0.54	-0.05	0.59	103rd Driest	Driest since: 1946	2018
May–Dec 1948 8-Month	0.54	-0.05	0.59	28th Wettest	Wettest since: 1947	1968
Apr–Dec 1948 9-Month	0.98	-0.03	1.01	119th Driest	Driest since: 1947	1938
Apr–Dec 1948 9-Month	0.98	-0.03	1.01	12th Wettest	Wettest since: 1937	1937
Mar–Dec 1948 10-Month	0.84	-0.05	0.89	115th Driest	Driest since: 1947	1992
Mar–Dec 1948 10-Month	0.84	-0.05	0.89	16th Wettest	Wettest since: 1937	1920, 1937
Feb–Dec 1948 11-Month	0.92	-0.04	0.96	121st Driest	Driest since: 1947	2018
Feb–Dec 1948 11-Month	0.92	-0.04	0.96	10th Wettest	Wettest since: 1937	1983
Jan–Dec 1948 12-Month	0.84	-0.04	0.88	119th Driest	Driest since: 1947	1992
Jan–Dec 1948 12-Month	0.84	-0.04	0.88	12th Wettest	Wettest since: 1937	1983
Jul 1947–Dec 1948 18-Month	0.89	-0.04	0.93	127th Driest	Driest since: 1947	1992
Jul 1947–Dec 1948 18-Month	0.89	-0.04	0.93	3rd Wettest	Wettest to Date	1983, 1996
Jan 1947–Dec 1948 24-Month	0.50	-0.04	0.54	119th Driest	Driest since: 1947	1930
	0.50	-0.04	0.54	11th Wettest	Wettest since: 1902	1984
	Ties: 1902
Jan 1946–Dec 1948 36-Month	0.33	-0.03	0.36	110th Driest	Driest since: 1947	1930
Jan 1946–Dec 1948 36-Month	0.33	-0.03	0.36	19th Wettest	Wettest since: 1921	1997
Jan 1945–Dec 1948 48-Month	0.36	-0.04	0.40	115th Driest	Driest since: 1947	1926
Jan 1945–Dec 1948 48-Month	0.36	-0.04	0.40	13th Wettest	Wettest since: 1902	1998
Jan 1944–Dec 1948 60-Month	0.11	-0.04	0.15	92nd Driest	Driest since: 1947	1926, 1932
Jan 1944–Dec 1948 60-Month	0.11	-0.04	0.15	35th Wettest	Wettest since: 1920	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 26, 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 1948 Palmer Z-Index Rankings

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