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 4 Palmer Z-IndexDecember-February18962025190619161926193619461956196619761986199620062016-3.003.00-2.00-1.000.001.002.00-3.003.00-2.00-1.000.001.002.00ZingChart
Oregon, Climate Division 4 Palmer Z-Index
December-February
Period
Z-Index
Rank
(out of 130)
December 2024-February 20250.0268
December 2023-February 20240.65100
December 2022-February 2023-1.1723
December 2021-February 2022-0.9633
December 2020-February 20210.2883
December 2019-February 2020-0.5345
December 2018-February 20190.0571
December 2017-February 2018-1.2619
December 2016-February 20170.5693
December 2015-February 20160.5794
December 2014-February 2015-1.0230
December 2013-February 20140.3084
December 2012-February 2013-0.6740
December 2011-February 2012-0.0266
December 2010-February 20110.1478
December 2009-February 2010-1.5211
December 2008-February 2009-0.5147
December 2007-February 20080.6195
December 2006-February 20070.0470
December 2005-February 20060.97116
December 2004-February 2005-2.263
December 2003-February 20040.3387
December 2002-February 2003-0.3655
December 2001-February 20020.1176
December 2000-February 2001-2.382
December 1999-February 2000-0.7937
December 1998-February 19992.32128
December 1997-February 1998-0.3853
December 1996-February 19971.54122
December 1995-February 19962.37129
December 1994-February 1995-0.5048
December 1993-February 1994-0.7738
December 1992-February 1993-1.1026
December 1991-February 1992-1.5510
December 1990-February 1991-1.5112
December 1989-February 19900.0167
December 1988-February 1989-1.2420
December 1987-February 1988-0.3556
December 1986-February 1987-1.3816
December 1985-February 19860.5392
December 1984-February 1985-1.3816
December 1983-February 19840.0773
December 1982-February 19830.86111
December 1981-February 19822.05127
December 1980-February 1981-0.3257
December 1979-February 1980-0.6839
December 1978-February 19790.1075
December 1977-February 1978-0.1760
December 1976-February 1977-2.811
December 1975-February 19760.68101
December 1974-February 19751.01117
December 1973-February 19741.56123
December 1972-February 1973-1.1922
December 1971-February 19721.53121
December 1970-February 19710.97116
December 1969-February 19700.71102
December 1968-February 19690.3387
December 1967-February 1968-0.2059
December 1966-February 1967-0.4949
December 1965-February 1966-0.5246
December 1964-February 19651.82125
December 1963-February 1964-0.8135
December 1962-February 1963-1.1325
December 1961-February 1962-1.1624
December 1960-February 19610.73104
December 1959-February 1960-1.1026
December 1958-February 1959-0.3853
December 1957-February 19581.66124
December 1956-February 1957-0.4949
December 1955-February 19561.88126
December 1954-February 1955-1.4714
December 1953-February 19540.85110
December 1952-February 19532.57130
December 1951-February 1952-0.0266
December 1950-February 19510.65100
December 1949-February 19500.73104
December 1948-February 19491.08119
December 1947-February 19480.4991
December 1946-February 1947-1.0429
December 1945-February 19460.6398
December 1944-February 1945-0.5644
December 1943-February 1944-1.788
December 1942-February 19430.78106
December 1941-February 1942-0.2658
December 1940-February 1941-1.966
December 1939-February 19400.79108
December 1938-February 1939-0.0963
December 1937-February 19380.3889
December 1936-February 19370.79108
December 1935-February 19360.2481
December 1934-February 1935-0.8534
December 1933-February 1934-0.4251
December 1932-February 19330.2079
December 1931-February 1932-0.6541
December 1930-February 1931-2.094
December 1929-February 19301.02118
December 1928-February 1929-1.4515
December 1927-February 1928-1.867
December 1926-February 19270.6398
December 1925-February 19260.0672
December 1924-February 19250.2380
December 1923-February 1924-0.8135
December 1922-February 19230.4090
December 1921-February 1922-1.4913
December 1920-February 19210.96114
December 1919-February 1920-1.995
December 1918-February 19190.3889
December 1917-February 19181.40120
December 1916-February 1917-1.0628
December 1915-February 19160.3285
December 1914-February 1915-1.699
December 1913-February 1914-0.6342
December 1912-February 1913-1.0230
December 1911-February 19120.6296
December 1910-February 1911-1.2221
December 1909-February 19100.1075
December 1908-February 19090.82109
December 1907-February 19080.0369
December 1906-February 19070.92113
December 1905-February 1906-0.4251
December 1904-February 1905-1.3318
December 1903-February 19040.91112
December 1902-February 1903-0.0464
December 1901-February 1902-0.1462
December 1900-February 19010.2782
December 1899-February 1900-0.9832
December 1898-February 1899-0.6342
December 1897-February 1898-0.1661
December 1896-February 18970.1377
December 1895-February 18960.76105

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