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 1997 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1997 1-Month	-1.82	-0.20	-1.62	26th Driest	Driest since: 1991	2013
	-1.82	-0.20	-1.62	105th Wettest	Wettest since: 1996	2015
	Ties: 1991
Nov–Dec 1997 2-Month	-1.57	-0.04	-1.53	18th Driest	Driest since: 1990	2013
	-1.57	-0.04	-1.53	113th Wettest	Wettest since: 1996	1973
	Ties: 1990
Oct–Dec 1997 3-Month	-0.16	-0.11	-0.05	64th Driest	Driest since: 1993	2013
	-0.16	-0.11	-0.05	67th Wettest	Wettest since: 1996	2016
	Ties: 1921
Sep–Dec 1997 4-Month	1.03	-0.05	1.08	119th Driest	Driest since: 1995	1976
Sep–Dec 1997 4-Month	1.03	-0.05	1.08	12th Wettest	Wettest since: 1996	1973
Aug–Dec 1997 5-Month	1.13	-0.07	1.20	119th Driest	Driest since: 1995	1936
Aug–Dec 1997 5-Month	1.13	-0.07	1.20	12th Wettest	Wettest since: 1996	1968
Jul–Dec 1997 6-Month	1.10	-0.07	1.17	123rd Driest	Driest since: 1996	2018
Jul–Dec 1997 6-Month	1.10	-0.07	1.17	8th Wettest	Wettest since: 1983	1920
Jun–Dec 1997 7-Month	1.11	-0.06	1.17	121st Driest	Driest since: 1996	2018
Jun–Dec 1997 7-Month	1.11	-0.06	1.17	10th Wettest	Wettest since: 1983	1920
May–Dec 1997 8-Month	0.88	-0.05	0.93	116th Driest	Driest since: 1995	2018
	0.88	-0.05	0.93	15th Wettest	Wettest since: 1996	1968
	Ties: 1942
Apr–Dec 1997 9-Month	0.90	-0.03	0.93	114th Driest	Driest since: 1995	1938
Apr–Dec 1997 9-Month	0.90	-0.03	0.93	17th Wettest	Wettest since: 1996	1937
Mar–Dec 1997 10-Month	0.97	-0.05	1.02	121st Driest	Driest since: 1996	1992
	0.97	-0.05	1.02	10th Wettest	Wettest since: 1996	1920, 1937
	Ties: 1996
Feb–Dec 1997 11-Month	0.65	-0.04	0.69	108th Driest	Driest since: 1995	2018
Feb–Dec 1997 11-Month	0.65	-0.04	0.69	23rd Wettest	Wettest since: 1996	1983
Jan–Dec 1997 12-Month	0.63	-0.04	0.67	115th Driest	Driest since: 1995	1992
Jan–Dec 1997 12-Month	0.63	-0.04	0.67	16th Wettest	Wettest since: 1996	1983
Jul 1996–Dec 1997 18-Month	0.75	-0.04	0.79	125th Driest	Driest since: 1995	1992
Jul 1996–Dec 1997 18-Month	0.75	-0.04	0.79	5th Wettest	Wettest since: 1996	1983, 1996
Jan 1996–Dec 1997 24-Month	0.96	-0.04	1.00	128th Driest	Driest since: 1996	1930
Jan 1996–Dec 1997 24-Month	0.96	-0.04	1.00	2nd Wettest	Wettest since: 1984	1984
Jan 1995–Dec 1997 36-Month	0.84	-0.03	0.87	128th Driest	Driest since: 1996	1930
Jan 1995–Dec 1997 36-Month	0.84	-0.03	0.87	1st Wettest	Wettest to Date	1997
Jan 1994–Dec 1997 48-Month	0.51	-0.04	0.55	123rd Driest	Driest since: 1996	1926
Jan 1994–Dec 1997 48-Month	0.51	-0.04	0.55	5th Wettest	Wettest since: 1984	1998
Jan 1993–Dec 1997 60-Month	0.46	-0.04	0.50	123rd Driest	Driest since: 1996	1926, 1932
Jan 1993–Dec 1997 60-Month	0.46	-0.04	0.50	4th Wettest	Wettest since: 1984	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 28, 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 1997 Palmer Z-Index Rankings

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