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 1947 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1947 1-Month	-1.56	-0.20	-1.36	35th Driest	Driest since: 1944	2013
December 1947 1-Month	-1.56	-0.20	-1.36	96th Wettest	Wettest since: 1946	2015
Nov–Dec 1947 2-Month	-1.76	-0.04	-1.72	12th Driest	Driest since: 1943	2013
	-1.76	-0.04	-1.72	119th Wettest	Wettest since: 1946	1973
	Ties: 1908
Oct–Dec 1947 3-Month	0.82	-0.11	0.93	107th Driest	Driest since: 1946	2013
Oct–Dec 1947 3-Month	0.82	-0.11	0.93	24th Wettest	Wettest since: 1942	2016
Sep–Dec 1947 4-Month	0.51	-0.05	0.56	98th Driest	Driest since: 1946	1976
Sep–Dec 1947 4-Month	0.51	-0.05	0.56	33rd Wettest	Wettest since: 1945	1973
Aug–Dec 1947 5-Month	0.60	-0.07	0.67	109th Driest	Driest since: 1946	1936
Aug–Dec 1947 5-Month	0.60	-0.07	0.67	22nd Wettest	Wettest since: 1941	1968
Jul–Dec 1947 6-Month	1.00	-0.07	1.07	120th Driest	Driest since: 1946	2018
Jul–Dec 1947 6-Month	1.00	-0.07	1.07	11th Wettest	Wettest since: 1920	1920
Jun–Dec 1947 7-Month	1.49	-0.06	1.55	128th Driest	Driest since: 1946	2018
Jun–Dec 1947 7-Month	1.49	-0.06	1.55	3rd Wettest	Wettest since: 1920	1920
May–Dec 1947 8-Month	0.91	-0.05	0.96	118th Driest	Driest since: 1946	2018
May–Dec 1947 8-Month	0.91	-0.05	0.96	13th Wettest	Wettest since: 1937	1968
Apr–Dec 1947 9-Month	0.69	-0.03	0.72	110th Driest	Driest since: 1946	1938
Apr–Dec 1947 9-Month	0.69	-0.03	0.72	21st Wettest	Wettest since: 1942	1937
Mar–Dec 1947 10-Month	0.55	-0.05	0.60	104th Driest	Driest since: 1946	1992
Mar–Dec 1947 10-Month	0.55	-0.05	0.60	27th Wettest	Wettest since: 1937	1920, 1937
Feb–Dec 1947 11-Month	0.29	-0.04	0.33	93rd Driest	Driest since: 1946	2018
Feb–Dec 1947 11-Month	0.29	-0.04	0.33	38th Wettest	Wettest since: 1945	1983
Jan–Dec 1947 12-Month	0.16	-0.04	0.20	88th Driest	Driest since: 1946	1992
	0.16	-0.04	0.20	43rd Wettest	Wettest since: 1945	1983
	Ties: 1927
Jul 1946–Dec 1947 18-Month	0.17	-0.04	0.21	86th Driest	Driest since: 1946	1992
Jul 1946–Dec 1947 18-Month	0.17	-0.04	0.21	44th Wettest	Wettest since: 1942	1983, 1996
Jan 1946–Dec 1947 24-Month	0.07	-0.04	0.11	80th Driest	Driest since: 1945	1930
Jan 1946–Dec 1947 24-Month	0.07	-0.04	0.11	50th Wettest	Wettest since: 1946	1984
Jan 1945–Dec 1947 36-Month	0.20	-0.03	0.23	100th Driest	Driest since: 1946	1930
Jan 1945–Dec 1947 36-Month	0.20	-0.03	0.23	29th Wettest	Wettest since: 1921	1997
Jan 1944–Dec 1947 48-Month	-0.07	-0.04	-0.03	72nd Driest	Driest since: 1946	1926
Jan 1944–Dec 1947 48-Month	-0.07	-0.04	-0.03	56th Wettest	Wettest since: 1943	1998
Jan 1943–Dec 1947 60-Month	-0.08	-0.04	-0.04	60th Driest	Driest since: 1946	1926, 1932
	-0.08	-0.04	-0.04	67th Wettest	Wettest since: 1946	1999
	Ties: 1946

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 1947 Palmer Z-Index Rankings

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