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 2012 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2012 1-Month	1.49	-0.19	1.68	109th Driest	Driest since: 2011	1985
December 2012 1-Month	1.49	-0.19	1.68	22nd Wettest	Wettest since: 1999	1933
Nov–Dec 2012 2-Month	1.25	-0.03	1.28	105th Driest	Driest since: 2011	1976
	1.25	-0.03	1.28	26th Wettest	Wettest since: 2006	1998
	Ties: 2001
Oct–Dec 2012 3-Month	1.84	-0.04	1.88	125th Driest	Driest since: 2011	2013
Oct–Dec 2012 3-Month	1.84	-0.04	1.88	6th Wettest	Wettest since: 1998	1975
Sep–Dec 2012 4-Month	0.55	-0.03	0.58	93rd Driest	Driest since: 2011	1976
	0.55	-0.03	0.58	38th Wettest	Wettest since: 2010	1933
	Ties: 1956
Aug–Dec 2012 5-Month	0.07	-0.05	0.12	74th Driest	Driest since: 2011	1929
	0.07	-0.05	0.12	57th Wettest	Wettest since: 2010	1975
	Ties: 1917, 1983
Jul–Dec 2012 6-Month	0.03	-0.08	0.11	74th Driest	Driest since: 2011	1930
	0.03	-0.08	0.11	57th Wettest	Wettest since: 2010	1975
	Ties: 1910
Jun–Dec 2012 7-Month	0.38	-0.06	0.44	94th Driest	Driest since: 2011	1944
	0.38	-0.06	0.44	37th Wettest	Wettest since: 2010	1997
	Ties: 1990
May–Dec 2012 8-Month	0.40	-0.04	0.44	99th Driest	Driest since: 2011	2023
May–Dec 2012 8-Month	0.40	-0.04	0.44	32nd Wettest	Wettest since: 2010	1997
Apr–Dec 2012 9-Month	0.46	-0.04	0.50	105th Driest	Driest since: 2011	1935
	0.46	-0.04	0.50	26th Wettest	Wettest since: 2010	1997
	Ties: 1977
Mar–Dec 2012 10-Month	0.84	-0.05	0.89	121st Driest	Driest since: 2011	1992
Mar–Dec 2012 10-Month	0.84	-0.05	0.89	10th Wettest	Wettest since: 1997	1997
Feb–Dec 2012 11-Month	0.69	-0.06	0.75	114th Driest	Driest since: 2011	1992
Feb–Dec 2012 11-Month	0.69	-0.06	0.75	17th Wettest	Wettest since: 1999	1997
Jan–Dec 2012 12-Month	0.63	-0.06	0.69	115th Driest	Driest since: 2011	2019
	0.63	-0.06	0.69	16th Wettest	Wettest since: 1999	1997
	Ties: 1921
Jul 2011–Dec 2012 18-Month	0.18	-0.06	0.24	88th Driest	Driest since: 2009	2023
Jul 2011–Dec 2012 18-Month	0.18	-0.06	0.24	42nd Wettest	Wettest since: 2011	1997
Jan 2011–Dec 2012 24-Month	0.43	-0.05	0.48	115th Driest	Driest since: 2011	1930
Jan 2011–Dec 2012 24-Month	0.43	-0.05	0.48	15th Wettest	Wettest since: 1998	1997
Jan 2010–Dec 2012 36-Month	0.47	-0.05	0.52	118th Driest	Driest since: 2011	1930
Jan 2010–Dec 2012 36-Month	0.47	-0.05	0.52	11th Wettest	Wettest since: 1999	1997
Jan 2009–Dec 2012 48-Month	0.19	-0.05	0.24	98th Driest	Driest since: 2011	1925
Jan 2009–Dec 2012 48-Month	0.19	-0.05	0.24	30th Wettest	Wettest since: 2000	1999
Jan 2008–Dec 2012 60-Month	0.04	-0.05	0.09	76th Driest	Driest since: 2011	1926
	0.04	-0.05	0.09	51st Wettest	Wettest since: 2001	1903
	Ties: 1910

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 2012 Palmer Z-Index Rankings

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