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
September-November
Period
Z-Index
Rank
(out of 130)
September-November 2024-1.9014
September-November 2023-0.0160
September-November 20220.3875
September-November 20212.37123
September-November 2020-1.6318
September-November 2019-0.1256
September-November 20183.80129
September-November 2017-0.1753
September-November 2016-2.1111
September-November 2015-0.7936
September-November 2014-0.8134
September-November 2013-0.3945
September-November 20120.4586
September-November 20115.57130
September-November 20100.6995
September-November 20090.5993
September-November 20080.0564
September-November 2007-1.1027
September-November 20061.65116
September-November 20050.5993
September-November 20042.73127
September-November 20032.64125
September-November 20021.52114
September-November 2001-1.2324
September-November 2000-0.8833
September-November 19991.35111
September-November 1998-2.1410
September-November 19970.4484
September-November 19962.93128
September-November 19951.27107
September-November 19940.0363
September-November 19931.33110
September-November 19920.8598
September-November 1991-1.7716
September-November 19901.54115
September-November 19890.4788
September-November 1988-0.4643
September-November 19871.32109
September-November 19860.4278
September-November 19850.4380
September-November 1984-0.7437
September-November 1983-0.1256
September-November 1982-1.3223
September-November 1981-0.3747
September-November 1980-1.5919
September-November 19792.11119
September-November 1978-0.7138
September-November 19772.13120
September-November 19762.16121
September-November 19752.73127
September-November 19740.0161
September-November 19730.3474
September-November 19720.2673
September-November 1971-0.3648
September-November 19700.6594
September-November 1969-0.5141
September-November 19680.4687
September-November 19670.4586
September-November 19660.4484
September-November 1965-0.8932
September-November 1964-2.903
September-November 1963-1.5820
September-November 19620.7496
September-November 1961-2.0113
September-November 1960-0.1654
September-November 19590.3976
September-November 19580.2673
September-November 1957-1.0628
September-November 19561.00101
September-November 19551.26105
September-November 1954-0.9930
September-November 1953-2.0212
September-November 19520.2270
September-November 1951-0.4044
September-November 19501.20104
September-November 1949-1.5721
September-November 1948-0.0658
September-November 1947-1.2025
September-November 1946-0.3250
September-November 19452.60124
September-November 19440.0262
September-November 19430.5290
September-November 19421.08102
September-November 1941-2.346
September-November 19400.4077
September-November 1939-1.3322
September-November 1938-0.2152
September-November 19371.31108
September-November 1936-1.1326
September-November 1935-0.3349
September-November 19341.88118
September-November 19330.2069
September-November 19320.8699
September-November 1931-3.152
September-November 1930-3.791
September-November 19291.37112
September-November 1928-1.8015
September-November 19271.10103
September-November 19262.29122
September-November 19250.4380
September-November 1924-0.0459
September-November 1923-0.9930
September-November 1922-2.278
September-November 19210.4989
September-November 19200.7897
September-November 19190.2471
September-November 19180.0865
September-November 19170.97100
September-November 1916-0.3945
September-November 1915-0.8134
September-November 1914-2.395
September-November 19130.4484
September-November 19121.27107
September-November 19111.44113
September-November 1910-0.6939
September-November 1909-2.287
September-November 1908-2.524
September-November 19071.77117
September-November 1906-0.4942
September-November 19050.1366
September-November 1904-1.0029
September-November 19030.1668
September-November 19020.4484
September-November 1901-0.5240
September-November 1900-1.6717
September-November 1899-0.3250
September-November 18980.1668
September-November 1897-0.1455
September-November 18960.5993
September-November 1895-2.249

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