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 1988 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1988 1-Month	-1.61	-0.20	-1.41	33rd Driest	Driest since: 1986	2013
December 1988 1-Month	-1.61	-0.20	-1.41	98th Wettest	Wettest since: 1987	2015
Nov–Dec 1988 2-Month	1.16	-0.04	1.20	112th Driest	Driest since: 1987	2013
Nov–Dec 1988 2-Month	1.16	-0.04	1.20	19th Wettest	Wettest since: 1983	1973
Oct–Dec 1988 3-Month	-0.29	-0.11	-0.18	56th Driest	Driest since: 1987	2013
	-0.29	-0.11	-0.18	75th Wettest	Wettest since: 1984	2016
	Ties: 1963
Sep–Dec 1988 4-Month	-0.41	-0.05	-0.36	41st Driest	Driest since: 1987	1976
Sep–Dec 1988 4-Month	-0.41	-0.05	-0.36	90th Wettest	Wettest since: 1986	1973
Aug–Dec 1988 5-Month	-0.48	-0.07	-0.41	43rd Driest	Driest since: 1987	1936
Aug–Dec 1988 5-Month	-0.48	-0.07	-0.41	88th Wettest	Wettest since: 1986	1968
Jul–Dec 1988 6-Month	-0.29	-0.07	-0.22	56th Driest	Driest since: 1987	2018
Jul–Dec 1988 6-Month	-0.29	-0.07	-0.22	75th Wettest	Wettest since: 1986	1920
Jun–Dec 1988 7-Month	-0.11	-0.06	-0.05	71st Driest	Driest since: 1987	2018
Jun–Dec 1988 7-Month	-0.11	-0.06	-0.05	60th Wettest	Wettest since: 1985	1920
May–Dec 1988 8-Month	0.20	-0.05	0.25	90th Driest	Driest since: 1987	2018
May–Dec 1988 8-Month	0.20	-0.05	0.25	41st Wettest	Wettest since: 1984	1968
Apr–Dec 1988 9-Month	0.16	-0.03	0.19	88th Driest	Driest since: 1987	1938
Apr–Dec 1988 9-Month	0.16	-0.03	0.19	43rd Wettest	Wettest since: 1984	1937
Mar–Dec 1988 10-Month	0.02	-0.05	0.07	74th Driest	Driest since: 1987	1992
Mar–Dec 1988 10-Month	0.02	-0.05	0.07	57th Wettest	Wettest since: 1984	1920, 1937
Feb–Dec 1988 11-Month	-0.32	-0.04	-0.28	52nd Driest	Driest since: 1987	2018
Feb–Dec 1988 11-Month	-0.32	-0.04	-0.28	79th Wettest	Wettest since: 1986	1983
Jan–Dec 1988 12-Month	-0.28	-0.04	-0.24	49th Driest	Driest since: 1987	1992
	-0.28	-0.04	-0.24	82nd Wettest	Wettest since: 1986	1983
	Ties: 1915
Jul 1987–Dec 1988 18-Month	-0.46	-0.04	-0.42	34th Driest	Driest since: 1987	1992
Jul 1987–Dec 1988 18-Month	-0.46	-0.04	-0.42	96th Wettest	Wettest since: 1986	1983, 1996
Jan 1987–Dec 1988 24-Month	-0.53	-0.04	-0.49	26th Driest	Driest since: 1967	1930
Jan 1987–Dec 1988 24-Month	-0.53	-0.04	-0.49	104th Wettest	Wettest since: 1987	1984
Jan 1986–Dec 1988 36-Month	-0.34	-0.03	-0.31	34th Driest	Driest since: 1987	1930
	-0.34	-0.03	-0.31	95th Wettest	Wettest since: 1986	1997
	Ties: 1911, 1966
Jan 1985–Dec 1988 48-Month	-0.44	-0.04	-0.40	23rd Driest	Driest since: 1941	1926
	-0.44	-0.04	-0.40	105th Wettest	Wettest since: 1987	1998
	Ties: 1928
Jan 1984–Dec 1988 60-Month	-0.25	-0.04	-0.21	42nd Driest	Driest since: 1969	1926, 1932
Jan 1984–Dec 1988 60-Month	-0.25	-0.04	-0.21	85th Wettest	Wettest since: 1987	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 29, 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 1988 Palmer Z-Index Rankings

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