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
Pennsylvania, Climate Division 5 Palmer Z-Index
December-February
Period
Z-Index
Rank
(out of 130)
December 2024-February 2025-1.1015
December 2023-February 20241.91120
December 2022-February 20230.2673
December 2021-February 20220.0860
December 2020-February 20210.4683
December 2019-February 20200.2068
December 2018-February 20191.96121
December 2017-February 20180.7597
December 2016-February 2017-0.7630
December 2015-February 20161.06105
December 2014-February 2015-0.9918
December 2013-February 20140.1264
December 2012-February 20130.4581
December 2011-February 2012-0.2147
December 2010-February 20110.0961
December 2009-February 20100.5586
December 2008-February 20090.0961
December 2007-February 20081.60118
December 2006-February 2007-0.2147
December 2005-February 20060.4078
December 2004-February 20051.13107
December 2003-February 20040.5887
December 2002-February 20030.7295
December 2001-February 2002-1.623
December 2000-February 2001-1.0316
December 1999-February 2000-0.1751
December 1998-February 1999-0.7132
December 1997-February 19982.19124
December 1996-February 19970.5385
December 1995-February 19961.35115
December 1994-February 19950.1867
December 1993-February 19941.21111
December 1992-February 1993-0.3342
December 1991-February 1992-1.1213
December 1990-February 19910.6290
December 1989-February 1990-0.8722
December 1988-February 1989-1.317
December 1987-February 1988-0.7728
December 1986-February 1987-0.3342
December 1985-February 1986-0.2246
December 1984-February 1985-1.1213
December 1983-February 19842.06122
December 1982-February 1983-1.2410
December 1981-February 1982-0.0157
December 1980-February 19810.1365
December 1979-February 1980-1.842
December 1978-February 19792.67130
December 1977-February 19782.26127
December 1976-February 1977-1.366
December 1975-February 19760.1063
December 1974-February 19751.55116
December 1973-February 19741.17109
December 1972-February 19730.98102
December 1971-February 19720.5084
December 1970-February 19711.20110
December 1969-February 19700.3475
December 1968-February 1969-1.594
December 1967-February 1968-1.1511
December 1966-February 1967-1.385
December 1965-February 1966-0.3044
December 1964-February 1965-0.8224
December 1963-February 19640.3977
December 1962-February 1963-0.7728
December 1961-February 19620.4379
December 1960-February 1961-0.4837
December 1959-February 19600.6893
December 1958-February 1959-0.7925
December 1957-February 19581.64119
December 1956-February 1957-0.1552
December 1955-February 1956-0.9420
December 1954-February 1955-0.4338
December 1953-February 1954-0.6235
December 1952-February 19530.8799
December 1951-February 19521.02103
December 1950-February 19511.56117
December 1949-February 19501.05104
December 1948-February 19491.28112
December 1947-February 1948-0.9519
December 1946-February 1947-0.6036
December 1945-February 1946-0.6933
December 1944-February 19450.2673
December 1943-February 1944-1.298
December 1942-February 19430.6692
December 1941-February 1942-0.0354
December 1940-February 1941-0.7231
December 1939-February 1940-0.8423
December 1938-February 19391.09106
December 1937-February 1938-0.2147
December 1936-February 19372.21125
December 1935-February 19360.6491
December 1934-February 19350.2470
December 1933-February 1934-1.1511
December 1932-February 1933-1.0117
December 1931-February 1932-0.7827
December 1930-February 1931-2.451
December 1929-February 1930-0.3740
December 1928-February 1929-0.9221
December 1927-February 19280.4581
December 1926-February 19270.0459
December 1925-February 19260.98102
December 1924-February 1925-0.4039
December 1923-February 19241.17109
December 1922-February 1923-0.0453
December 1921-February 1922-0.6634
December 1920-February 19210.1867
December 1919-February 19200.3876
December 1918-February 1919-0.0354
December 1917-February 19180.2269
December 1916-February 1917-0.2445
December 1915-February 19160.2673
December 1914-February 19152.28128
December 1913-February 19140.95100
December 1912-February 19130.2774
December 1911-February 1912-0.3641
December 1910-February 1911-0.2147
December 1909-February 19101.35115
December 1908-February 19090.4683
December 1907-February 19082.17123
December 1906-February 19070.5988
December 1905-February 19060.0158
December 1904-February 1905-0.0256
December 1903-February 19040.7094
December 1902-February 19032.42129
December 1901-February 19022.24126
December 1900-February 1901-1.289
December 1899-February 19000.7496
December 1898-February 18991.34113
December 1897-February 18980.7698
December 1896-February 1897-0.7925
December 1895-February 18960.6290

Citing This Page