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.

Washington, Climate Division 1

December 1946 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1946 1-Month	-0.66	-0.19	-0.47	52nd Driest	Driest since: 1944	1985
December 1946 1-Month	-0.66	-0.19	-0.47	79th Wettest	Wettest since: 1945	1933
Nov–Dec 1946 2-Month	-0.56	-0.03	-0.53	39th Driest	Driest since: 1944	1976
Nov–Dec 1946 2-Month	-0.56	-0.03	-0.53	92nd Wettest	Wettest since: 1945	1998
Oct–Dec 1946 3-Month	-0.39	-0.04	-0.35	45th Driest	Driest since: 1944	2013
Oct–Dec 1946 3-Month	-0.39	-0.04	-0.35	86th Wettest	Wettest since: 1945	1975
Sep–Dec 1946 4-Month	-0.60	-0.03	-0.57	38th Driest	Driest since: 1944	1976
Sep–Dec 1946 4-Month	-0.60	-0.03	-0.57	93rd Wettest	Wettest since: 1945	1933
Aug–Dec 1946 5-Month	-0.75	-0.05	-0.70	29th Driest	Driest since: 1944	1929
Aug–Dec 1946 5-Month	-0.75	-0.05	-0.70	102nd Wettest	Wettest since: 1945	1975
Jul–Dec 1946 6-Month	-0.59	-0.08	-0.51	39th Driest	Driest since: 1944	1930
Jul–Dec 1946 6-Month	-0.59	-0.08	-0.51	92nd Wettest	Wettest since: 1945	1975
Jun–Dec 1946 7-Month	-0.08	-0.06	-0.02	64th Driest	Driest since: 1945	1944
	-0.08	-0.06	-0.02	67th Wettest	Wettest since: 1942	1997
	Ties: 1924
May–Dec 1946 8-Month	-0.46	-0.04	-0.42	35th Driest	Driest since: 1944	2023
May–Dec 1946 8-Month	-0.46	-0.04	-0.42	96th Wettest	Wettest since: 1945	1997
Apr–Dec 1946 9-Month	-0.15	-0.04	-0.11	57th Driest	Driest since: 1945	1935
Apr–Dec 1946 9-Month	-0.15	-0.04	-0.11	74th Wettest	Wettest since: 1941	1997
Mar–Dec 1946 10-Month	-0.07	-0.05	-0.02	61st Driest	Driest since: 1945	1992
Mar–Dec 1946 10-Month	-0.07	-0.05	-0.02	70th Wettest	Wettest since: 1937	1997
Feb–Dec 1946 11-Month	-0.01	-0.06	0.05	66th Driest	Driest since: 1945	1992
Feb–Dec 1946 11-Month	-0.01	-0.06	0.05	65th Wettest	Wettest since: 1937	1997
Jan–Dec 1946 12-Month	-0.01	-0.06	0.05	71st Driest	Driest since: 1945	2019
Jan–Dec 1946 12-Month	-0.01	-0.06	0.05	60th Wettest	Wettest since: 1937	1997
Jul 1945–Dec 1946 18-Month	-0.11	-0.06	-0.05	61st Driest	Driest since: 1945	2023
	-0.11	-0.06	-0.05	69th Wettest	Wettest since: 1937	1997
	Ties: 1909, 1927
Jan 1945–Dec 1946 24-Month	-0.03	-0.05	0.02	71st Driest	Driest since: 1945	1930
Jan 1945–Dec 1946 24-Month	-0.03	-0.05	0.02	59th Wettest	Wettest since: 1937	1997
Jan 1944–Dec 1946 36-Month	-0.45	-0.05	-0.40	23rd Driest	Driest since: 1945	1930
	-0.45	-0.05	-0.40	106th Wettest	Wettest since: 1942	1997
	Ties: 1942
Jan 1943–Dec 1946 48-Month	-0.51	-0.05	-0.46	13th Driest	Driest since: 1945	1925
	-0.51	-0.05	-0.46	115th Wettest	Wettest since: 1943	1999
	Ties: 1924, 1943
Jan 1942–Dec 1946 60-Month	-0.54	-0.05	-0.49	12th Driest	Driest since: 1945	1926
Jan 1942–Dec 1946 60-Month	-0.54	-0.05	-0.49	115th Wettest	Wettest since: 1943	1903

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Washington, Climate Division 1

December 1946 Palmer Z-Index Rankings

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