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 1989 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1989 1-Month	-2.88	-0.20	-2.68	2nd Driest	Driest to Date	2013
December 1989 1-Month	-2.88	-0.20	-2.68	129th Wettest	Wettest since: 1988	2015
Nov–Dec 1989 2-Month	-2.46	-0.04	-2.42	2nd Driest	Driest to Date	2013
Nov–Dec 1989 2-Month	-2.46	-0.04	-2.42	129th Wettest	Wettest since: 1988	1973
Oct–Dec 1989 3-Month	-1.68	-0.11	-1.57	7th Driest	Driest since: 1978	2013
Oct–Dec 1989 3-Month	-1.68	-0.11	-1.57	124th Wettest	Wettest since: 1988	2016
Sep–Dec 1989 4-Month	-1.70	-0.05	-1.65	2nd Driest	Driest since: 1976	1976
Sep–Dec 1989 4-Month	-1.70	-0.05	-1.65	129th Wettest	Wettest since: 1988	1973
Aug–Dec 1989 5-Month	-1.10	-0.07	-1.03	12th Driest	Driest since: 1987	1936
	-1.10	-0.07	-1.03	119th Wettest	Wettest since: 1988	1968
	Ties: 1923, 1929
Jul–Dec 1989 6-Month	-0.82	-0.07	-0.75	24th Driest	Driest since: 1987	2018
Jul–Dec 1989 6-Month	-0.82	-0.07	-0.75	107th Wettest	Wettest since: 1988	1920
Jun–Dec 1989 7-Month	-0.80	-0.06	-0.74	22nd Driest	Driest since: 1987	2018
Jun–Dec 1989 7-Month	-0.80	-0.06	-0.74	109th Wettest	Wettest since: 1988	1920
May–Dec 1989 8-Month	-0.71	-0.05	-0.66	24th Driest	Driest since: 1987	2018
May–Dec 1989 8-Month	-0.71	-0.05	-0.66	107th Wettest	Wettest since: 1988	1968
Apr–Dec 1989 9-Month	-0.84	-0.03	-0.81	16th Driest	Driest since: 1987	1938
Apr–Dec 1989 9-Month	-0.84	-0.03	-0.81	115th Wettest	Wettest since: 1988	1937
Mar–Dec 1989 10-Month	-0.45	-0.05	-0.40	42nd Driest	Driest since: 1987	1992
Mar–Dec 1989 10-Month	-0.45	-0.05	-0.40	89th Wettest	Wettest since: 1988	1920, 1937
Feb–Dec 1989 11-Month	-0.57	-0.04	-0.53	34th Driest	Driest since: 1987	2018
	-0.57	-0.04	-0.53	97th Wettest	Wettest since: 1988	1983
	Ties: 1966
Jan–Dec 1989 12-Month	-0.59	-0.04	-0.55	33rd Driest	Driest since: 1987	1992
Jan–Dec 1989 12-Month	-0.59	-0.04	-0.55	98th Wettest	Wettest since: 1988	1983
Jul 1988–Dec 1989 18-Month	-0.49	-0.04	-0.45	31st Driest	Driest since: 1987	1992
	-0.49	-0.04	-0.45	99th Wettest	Wettest since: 1988	1983, 1996
	Ties: 1928
Jan 1988–Dec 1989 24-Month	-0.43	-0.04	-0.39	34th Driest	Driest since: 1988	1930
Jan 1988–Dec 1989 24-Month	-0.43	-0.04	-0.39	96th Wettest	Wettest since: 1987	1984
Jan 1987–Dec 1989 36-Month	-0.55	-0.03	-0.52	18th Driest	Driest since: 1967	1930
	-0.55	-0.03	-0.52	111th Wettest	Wettest since: 1988	1997
	Ties: 1932
Jan 1986–Dec 1989 48-Month	-0.40	-0.04	-0.36	28th Driest	Driest since: 1988	1926
Jan 1986–Dec 1989 48-Month	-0.40	-0.04	-0.36	100th Wettest	Wettest since: 1987	1998
Jan 1985–Dec 1989 60-Month	-0.47	-0.04	-0.43	15th Driest	Driest since: 1932	1926, 1932
Jan 1985–Dec 1989 60-Month	-0.47	-0.04	-0.43	112th Wettest	Wettest since: 1988	1999

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 1989 Palmer Z-Index Rankings

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