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 1921 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1921 1-Month	-1.20	-0.19	-1.01	38th Driest	Driest since: 1919	1985
December 1921 1-Month	-1.20	-0.19	-1.01	93rd Wettest	Wettest since: 1920	1933
Nov–Dec 1921 2-Month	0.17	-0.03	0.20	69th Driest	Driest since: 1920	1976
Nov–Dec 1921 2-Month	0.17	-0.03	0.20	62nd Wettest	Wettest since: 1917	1998
Oct–Dec 1921 3-Month	0.72	-0.04	0.76	94th Driest	Driest since: 1920	2013
Oct–Dec 1921 3-Month	0.72	-0.04	0.76	37th Wettest	Wettest since: 1915	1975
Sep–Dec 1921 4-Month	1.08	-0.03	1.11	121st Driest	Driest since: 1919	1976
Sep–Dec 1921 4-Month	1.08	-0.03	1.11	10th Wettest	Wettest since: 1920	1933
Aug–Dec 1921 5-Month	1.02	-0.05	1.07	120th Driest	Driest since: 1919	1929
Aug–Dec 1921 5-Month	1.02	-0.05	1.07	11th Wettest	Wettest since: 1920	1975
Jul–Dec 1921 6-Month	0.60	-0.08	0.68	109th Driest	Driest since: 1919	1930
Jul–Dec 1921 6-Month	0.60	-0.08	0.68	22nd Wettest	Wettest since: 1920	1975
Jun–Dec 1921 7-Month	0.85	-0.06	0.91	119th Driest	Driest since: 1919	1944
Jun–Dec 1921 7-Month	0.85	-0.06	0.91	12th Wettest	Wettest since: 1920	1997
May–Dec 1921 8-Month	0.72	-0.04	0.76	115th Driest	Driest since: 1919	2023
May–Dec 1921 8-Month	0.72	-0.04	0.76	16th Wettest	Wettest since: 1920	1997
Apr–Dec 1921 9-Month	0.74	-0.04	0.78	115th Driest	Driest since: 1919	1935
Apr–Dec 1921 9-Month	0.74	-0.04	0.78	16th Wettest	Wettest since: 1920	1997
Mar–Dec 1921 10-Month	0.51	-0.05	0.56	106th Driest	Driest since: 1919	1992
Mar–Dec 1921 10-Month	0.51	-0.05	0.56	25th Wettest	Wettest since: 1920	1997
Feb–Dec 1921 11-Month	0.53	-0.06	0.59	110th Driest	Driest since: 1919	1992
Feb–Dec 1921 11-Month	0.53	-0.06	0.59	21st Wettest	Wettest since: 1920	1997
Jan–Dec 1921 12-Month	0.63	-0.06	0.69	115th Driest	Driest since: 1920	2019
Jan–Dec 1921 12-Month	0.63	-0.06	0.69	16th Wettest	Wettest since: 1902	1997
Jul 1920–Dec 1921 18-Month	0.97	-0.06	1.03	128th Driest	Driest since: 1920	2023
Jul 1920–Dec 1921 18-Month	0.97	-0.06	1.03	2nd Wettest	Wettest to Date	1997
Jan 1920–Dec 1921 24-Month	0.60	-0.05	0.65	124th Driest	Driest since: 1920	1930
Jan 1920–Dec 1921 24-Month	0.60	-0.05	0.65	6th Wettest	Wettest since: 1900	1997
Jan 1919–Dec 1921 36-Month	0.29	-0.05	0.34	105th Driest	Driest since: 1920	1930
Jan 1919–Dec 1921 36-Month	0.29	-0.05	0.34	24th Wettest	Wettest since: 1904	1997
Jan 1918–Dec 1921 48-Month	0.14	-0.05	0.19	92nd Driest	Driest since: 1920	1925
Jan 1918–Dec 1921 48-Month	0.14	-0.05	0.19	36th Wettest	Wettest since: 1906	1999
Jan 1917–Dec 1921 60-Month	0.10	-0.05	0.15	89th Driest	Driest since: 1920	1926
Jan 1917–Dec 1921 60-Month	0.10	-0.05	0.15	38th Wettest	Wettest since: 1907	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 1921 Palmer Z-Index Rankings

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