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 1975 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1975 1-Month	2.18	-0.19	2.37	115th Driest	Driest since: 1974	1985
December 1975 1-Month	2.18	-0.19	2.37	16th Wettest	Wettest since: 1973	1933
Nov–Dec 1975 2-Month	1.98	-0.03	2.01	124th Driest	Driest since: 1974	1976
Nov–Dec 1975 2-Month	1.98	-0.03	2.01	7th Wettest	Wettest since: 1933	1998
Oct–Dec 1975 3-Month	3.21	-0.04	3.25	130th Driest	Driest since: 1974	2013
Oct–Dec 1975 3-Month	3.21	-0.04	3.25	1st Wettest	Wettest to Date	1975
Sep–Dec 1975 4-Month	1.77	-0.03	1.80	126th Driest	Driest since: 1974	1976
Sep–Dec 1975 4-Month	1.77	-0.03	1.80	5th Wettest	Wettest since: 1933	1933
Aug–Dec 1975 5-Month	2.43	-0.05	2.48	130th Driest	Driest since: 1974	1929
Aug–Dec 1975 5-Month	2.43	-0.05	2.48	1st Wettest	Wettest to Date	1975
Jul–Dec 1975 6-Month	1.78	-0.08	1.86	130th Driest	Driest since: 1974	1930
Jul–Dec 1975 6-Month	1.78	-0.08	1.86	1st Wettest	Wettest to Date	1975
Jun–Dec 1975 7-Month	1.44	-0.06	1.50	128th Driest	Driest since: 1974	1944
Jun–Dec 1975 7-Month	1.44	-0.06	1.50	3rd Wettest	Wettest since: 1920	1997
May–Dec 1975 8-Month	1.33	-0.04	1.37	126th Driest	Driest since: 1974	2023
May–Dec 1975 8-Month	1.33	-0.04	1.37	5th Wettest	Wettest since: 1933	1997
Apr–Dec 1975 9-Month	1.00	-0.04	1.04	121st Driest	Driest since: 1974	1935
Apr–Dec 1975 9-Month	1.00	-0.04	1.04	10th Wettest	Wettest since: 1968	1997
Mar–Dec 1975 10-Month	0.86	-0.05	0.91	122nd Driest	Driest since: 1974	1992
Mar–Dec 1975 10-Month	0.86	-0.05	0.91	9th Wettest	Wettest since: 1968	1997
Feb–Dec 1975 11-Month	0.76	-0.06	0.82	118th Driest	Driest since: 1974	1992
Feb–Dec 1975 11-Month	0.76	-0.06	0.82	13th Wettest	Wettest since: 1968	1997
Jan–Dec 1975 12-Month	0.72	-0.06	0.78	119th Driest	Driest since: 1973	2019
Jan–Dec 1975 12-Month	0.72	-0.06	0.78	12th Wettest	Wettest since: 1974	1997
Jul 1974–Dec 1975 18-Month	0.45	-0.06	0.51	113th Driest	Driest since: 1973	2023
	0.45	-0.06	0.51	17th Wettest	Wettest since: 1974	1997
	Ties: 1972
Jan 1974–Dec 1975 24-Month	0.77	-0.05	0.82	126th Driest	Driest since: 1974	1930
Jan 1974–Dec 1975 24-Month	0.77	-0.05	0.82	4th Wettest	Wettest since: 1933	1997
Jan 1973–Dec 1975 36-Month	0.46	-0.05	0.51	117th Driest	Driest since: 1974	1930
Jan 1973–Dec 1975 36-Month	0.46	-0.05	0.51	12th Wettest	Wettest since: 1955	1997
Jan 1972–Dec 1975 48-Month	0.49	-0.05	0.54	122nd Driest	Driest since: 1974	1925
	0.49	-0.05	0.54	6th Wettest	Wettest since: 1903	1999
	Ties: 1901, 1903
Jan 1971–Dec 1975 60-Month	0.50	-0.05	0.55	123rd Driest	Driest since: 1974	1926
	0.50	-0.05	0.55	4th Wettest	Wettest since: 1903	1903
	Ties: 1900

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 1975 Palmer Z-Index Rankings

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