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

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Pennsylvania, Climate Division 3 Palmer Z-IndexOctober-December18952024190519151925193519451955196519751985199520052015-4.004.00-3.00-2.00-1.000.001.002.003.00-4.004.00-3.00-2.00-1.000.001.002.003.00ZingChart
Pennsylvania, Climate Division 3 Palmer Z-Index
October-December
Period
Z-Index
Rank
(out of 130)
October-December 2024-3.002
October-December 20230.6688
October-December 20220.6990
October-December 2021-1.1827
October-December 20200.98102
October-December 20191.09107
October-December 20182.59128
October-December 2017-0.6839
October-December 2016-2.365
October-December 2015-0.2549
October-December 20140.1365
October-December 20131.01105
October-December 20121.13109
October-December 20111.11108
October-December 20100.7493
October-December 20091.89118
October-December 20080.7794
October-December 20070.7895
October-December 20061.01105
October-December 20052.25123
October-December 20040.5680
October-December 20032.14122
October-December 20022.32125
October-December 2001-3.511
October-December 2000-0.5740
October-December 1999-0.1754
October-December 1998-2.365
October-December 1997-0.9133
October-December 19963.36130
October-December 19951.51115
October-December 1994-0.8336
October-December 19931.32113
October-December 19920.4776
October-December 1991-1.2125
October-December 19900.6486
October-December 1989-0.3048
October-December 1988-0.5541
October-December 1987-0.0260
October-December 19861.01105
October-December 1985-0.0857
October-December 1984-1.0330
October-December 19832.88129
October-December 1982-1.6218
October-December 1981-0.4944
October-December 1980-1.2125
October-December 19790.5077
October-December 1978-0.3147
October-December 19772.32125
October-December 19760.8398
October-December 19750.1264
October-December 1974-0.2351
October-December 19730.2266
October-December 19722.53127
October-December 19710.4674
October-December 19700.6889
October-December 19690.4776
October-December 1968-0.5342
October-December 19670.5884
October-December 19660.4573
October-December 1965-2.079
October-December 1964-1.7915
October-December 1963-1.1328
October-December 1962-0.0458
October-December 1961-1.3320
October-December 1960-0.7838
October-December 19590.5782
October-December 1958-0.2052
October-December 1957-0.1953
October-December 19560.8297
October-December 1955-0.2549
October-December 1954-0.3846
October-December 1953-0.4345
October-December 19520.5782
October-December 19511.62116
October-December 19500.8096
October-December 1949-1.9312
October-December 19480.5884
October-December 1947-0.5043
October-December 1946-1.2822
October-December 19450.88100
October-December 1944-0.0260
October-December 19431.05106
October-December 19421.41114
October-December 1941-1.9610
October-December 19400.5579
October-December 1939-0.8935
October-December 19380.0663
October-December 19370.7291
October-December 1936-0.9034
October-December 19350.5178
October-December 1934-0.1356
October-December 1933-1.0929
October-December 19322.06119
October-December 1931-2.257
October-December 1930-2.843
October-December 19290.7392
October-December 1928-1.8213
October-December 19272.09120
October-December 19261.19110
October-December 19250.4071
October-December 1924-1.8213
October-December 19230.0262
October-December 1922-2.843
October-December 1921-1.2423
October-December 1920-0.0458
October-December 19190.3269
October-December 1918-1.9511
October-December 19170.3670
October-December 1916-1.2224
October-December 1915-0.1555
October-December 1914-1.3519
October-December 19130.3168
October-December 19120.4573
October-December 19111.25111
October-December 1910-0.9432
October-December 1909-1.6417
October-December 1908-1.7816
October-December 19072.13121
October-December 19061.32113
October-December 19050.6587
October-December 19040.2867
October-December 19030.90101
October-December 19022.37126
October-December 19010.8599
October-December 1900-2.098
October-December 1899-1.0131
October-December 18981.67117
October-December 18970.6385
October-December 1896-0.8037
October-December 1895-1.3221

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