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 1934 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1934 1-Month	0.22	-0.20	0.42	72nd Driest	Driest since: 1930	2013
	0.22	-0.20	0.42	59th Wettest	Wettest since: 1933	2015
	Ties: 1915
Nov–Dec 1934 2-Month	0.88	-0.04	0.92	100th Driest	Driest since: 1933	2013
Nov–Dec 1934 2-Month	0.88	-0.04	0.92	31st Wettest	Wettest since: 1932	1973
Oct–Dec 1934 3-Month	1.38	-0.11	1.49	119th Driest	Driest since: 1933	2013
Oct–Dec 1934 3-Month	1.38	-0.11	1.49	12th Wettest	Wettest since: 1896	2016
Sep–Dec 1934 4-Month	0.77	-0.05	0.82	113th Driest	Driest since: 1933	1976
Sep–Dec 1934 4-Month	0.77	-0.05	0.82	18th Wettest	Wettest since: 1924	1973
Aug–Dec 1934 5-Month	0.35	-0.07	0.42	99th Driest	Driest since: 1933	1936
Aug–Dec 1934 5-Month	0.35	-0.07	0.42	32nd Wettest	Wettest since: 1926	1968
Jul–Dec 1934 6-Month	0.12	-0.07	0.19	90th Driest	Driest since: 1933	2018
Jul–Dec 1934 6-Month	0.12	-0.07	0.19	41st Wettest	Wettest since: 1926	1920
Jun–Dec 1934 7-Month	-0.12	-0.06	-0.06	70th Driest	Driest since: 1932	2018
Jun–Dec 1934 7-Month	-0.12	-0.06	-0.06	61st Wettest	Wettest since: 1933	1920
May–Dec 1934 8-Month	-0.26	-0.05	-0.21	54th Driest	Driest since: 1932	2018
	-0.26	-0.05	-0.21	77th Wettest	Wettest since: 1933	1968
	Ties: 1901
Apr–Dec 1934 9-Month	-0.43	-0.03	-0.40	40th Driest	Driest since: 1932	1938
Apr–Dec 1934 9-Month	-0.43	-0.03	-0.40	91st Wettest	Wettest since: 1933	1937
Mar–Dec 1934 10-Month	-0.64	-0.05	-0.59	29th Driest	Driest since: 1930	1992
Mar–Dec 1934 10-Month	-0.64	-0.05	-0.59	102nd Wettest	Wettest since: 1933	1920, 1937
Feb–Dec 1934 11-Month	-0.91	-0.04	-0.87	12th Driest	Driest since: 1930	2018
Feb–Dec 1934 11-Month	-0.91	-0.04	-0.87	119th Wettest	Wettest since: 1933	1983
Jan–Dec 1934 12-Month	-0.86	-0.04	-0.82	13th Driest	Driest since: 1930	1992
Jan–Dec 1934 12-Month	-0.86	-0.04	-0.82	118th Wettest	Wettest since: 1933	1983
Jul 1933–Dec 1934 18-Month	-0.54	-0.04	-0.50	27th Driest	Driest since: 1931	1992
Jul 1933–Dec 1934 18-Month	-0.54	-0.04	-0.50	103rd Wettest	Wettest since: 1933	1983, 1996
Jan 1933–Dec 1934 24-Month	-0.15	-0.04	-0.11	59th Driest	Driest since: 1932	1930
Jan 1933–Dec 1934 24-Month	-0.15	-0.04	-0.11	71st Wettest	Wettest since: 1933	1984
Jan 1932–Dec 1934 36-Month	-0.22	-0.03	-0.19	47th Driest	Driest since: 1932	1930
Jan 1932–Dec 1934 36-Month	-0.22	-0.03	-0.19	82nd Wettest	Wettest since: 1933	1997
Jan 1931–Dec 1934 48-Month	-0.21	-0.04	-0.17	49th Driest	Driest since: 1933	1926
Jan 1931–Dec 1934 48-Month	-0.21	-0.04	-0.17	79th Wettest	Wettest since: 1923	1998
Jan 1930–Dec 1934 60-Month	-0.39	-0.04	-0.35	26th Driest	Driest since: 1933	1926, 1932
Jan 1930–Dec 1934 60-Month	-0.39	-0.04	-0.35	101st Wettest	Wettest since: 1924	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 1934 Palmer Z-Index Rankings

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