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. Data are available for bulk download.
Base Period
Trend

Filter
Oregon, Climate Division 6 Palmer Z-Index
December-February
Period
Z-Index
Rank
(out of 130)
December 2024-February 20251.26102
December 2023-February 20240.6181
December 2022-February 2023-0.6344
December 2021-February 2022-0.6542
December 2020-February 2021-0.1362
December 2019-February 2020-2.3411
December 2018-February 2019-0.0863
December 2017-February 2018-1.3119
December 2016-February 20170.7488
December 2015-February 20160.9593
December 2014-February 2015-0.9033
December 2013-February 2014-1.3119
December 2012-February 2013-0.7739
December 2011-February 2012-1.2423
December 2010-February 20111.0698
December 2009-February 2010-0.9132
December 2008-February 2009-0.2957
December 2007-February 20080.4775
December 2006-February 20070.9392
December 2005-February 20061.93115
December 2004-February 2005-4.082
December 2003-February 20041.28103
December 2002-February 2003-0.1461
December 2001-February 2002-0.5646
December 2000-February 2001-2.957
December 1999-February 2000-0.9830
December 1998-February 19991.39106
December 1997-February 1998-0.8235
December 1996-February 19973.00127
December 1995-February 19963.11129
December 1994-February 19951.0597
December 1993-February 1994-2.1215
December 1992-February 19930.0466
December 1991-February 1992-1.7017
December 1990-February 1991-2.718
December 1989-February 1990-2.2114
December 1988-February 1989-0.3356
December 1987-February 1988-0.5150
December 1986-February 1987-0.8136
December 1985-February 19861.0396
December 1984-February 1985-0.0664
December 1983-February 19841.0094
December 1982-February 19831.61110
December 1981-February 19822.40123
December 1980-February 19810.2770
December 1979-February 19800.7387
December 1978-February 1979-0.4951
December 1977-February 19782.16120
December 1976-February 1977-5.491
December 1975-February 19760.4674
December 1974-February 19750.7387
December 1973-February 19742.49124
December 1972-February 1973-1.2622
December 1971-February 19720.6884
December 1970-February 1971-0.4253
December 1969-February 19701.39106
December 1968-February 19692.07119
December 1967-February 1968-2.2413
December 1966-February 1967-0.3755
December 1965-February 1966-1.5318
December 1964-February 19653.09128
December 1963-February 1964-1.1028
December 1962-February 1963-0.5646
December 1961-February 1962-0.6542
December 1960-February 19610.3372
December 1959-February 1960-3.084
December 1958-February 19590.8589
December 1957-February 19581.46108
December 1956-February 1957-2.3710
December 1955-February 19563.52130
December 1954-February 1955-3.183
December 1953-February 19540.6383
December 1952-February 19531.33104
December 1951-February 19520.2168
December 1950-February 19512.34121
December 1949-February 19500.5880
December 1948-February 19491.68111
December 1947-February 19481.78113
December 1946-February 1947-1.1227
December 1945-February 19461.1399
December 1944-February 1945-1.2423
December 1943-February 1944-2.2512
December 1942-February 19432.52125
December 1941-February 19420.5679
December 1940-February 1941-1.1925
December 1939-February 19400.2871
December 1938-February 1939-2.449
December 1937-February 19381.47109
December 1936-February 1937-1.8016
December 1935-February 19360.6282
December 1934-February 1935-0.9231
December 1933-February 1934-0.7838
December 1932-February 1933-0.7241
December 1931-February 19320.4573
December 1930-February 1931-3.055
December 1929-February 19300.5679
December 1928-February 1929-0.7937
December 1927-February 1928-0.7739
December 1926-February 19271.82114
December 1925-February 1926-1.0129
December 1924-February 19250.5577
December 1923-February 1924-1.1326
December 1922-February 19231.18101
December 1921-February 19220.0365
December 1920-February 19211.96116
December 1919-February 1920-0.2358
December 1918-February 1919-0.3954
December 1917-February 19182.02117
December 1916-February 1917-0.5348
December 1915-February 19162.85126
December 1914-February 1915-2.996
December 1913-February 1914-0.1960
December 1912-February 1913-0.4951
December 1911-February 19120.0867
December 1910-February 1911-0.5348
December 1909-February 19101.42107
December 1908-February 1909-0.5845
December 1907-February 1908-0.2259
December 1906-February 19072.39122
December 1905-February 1906-0.8534
December 1904-February 1905-1.3021
December 1903-February 19041.17100
December 1902-February 19031.0396
December 1901-February 19020.2569
December 1900-February 19011.69112
December 1899-February 19000.6985
December 1898-February 18990.4976
December 1897-February 18980.8790
December 1896-February 18972.05118
December 1895-February 18960.9191

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