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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Iowa, Climate Division 8 Palmer Z-IndexOctober-December18952024190519151925193519451955196519751985199520052015-3.004.00-2.00-1.000.001.002.003.00-3.004.00-2.00-1.000.001.002.003.00ZingChart
Iowa, Climate Division 8 Palmer Z-Index
October-December
Period
Z-Index
Rank
(out of 130)
October-December 20240.1771
October-December 2023-1.3620
October-December 2022-0.1757
October-December 20211.27110
October-December 20200.1167
October-December 20190.89103
October-December 20182.64127
October-December 2017-0.4644
October-December 2016-1.3021
October-December 20152.93128
October-December 20140.5687
October-December 2013-0.8435
October-December 2012-0.4644
October-December 2011-0.2254
October-December 2010-0.3652
October-December 20092.09122
October-December 20081.57115
October-December 20071.87121
October-December 20060.6691
October-December 2005-1.7016
October-December 2004-0.4447
October-December 20030.2978
October-December 2002-1.2322
October-December 2001-0.4644
October-December 2000-0.5941
October-December 1999-1.7714
October-December 19981.15107
October-December 19970.78100
October-December 19960.3381
October-December 1995-0.9928
October-December 1994-0.1956
October-December 1993-0.1161
October-December 19921.60117
October-December 19911.45112
October-December 19900.3079
October-December 1989-0.9530
October-December 1988-1.8812
October-December 19871.09105
October-December 19860.6993
October-December 19851.51114
October-December 19841.14106
October-December 19832.15123
October-December 19822.51126
October-December 19810.7597
October-December 19800.5284
October-December 1979-0.4149
October-December 19780.6490
October-December 19771.59116
October-December 1976-1.6717
October-December 1975-0.8336
October-December 19740.6792
October-December 19731.67118
October-December 19721.51114
October-December 19710.7094
October-December 19701.31111
October-December 19690.3582
October-December 1968-0.1459
October-December 1967-0.0163
October-December 1966-1.7115
October-December 19650.1167
October-December 1964-0.8137
October-December 1963-2.217
October-December 19620.2275
October-December 19612.29125
October-December 1960-0.0562
October-December 19591.18108
October-December 1958-0.7738
October-December 19570.2074
October-December 1956-2.543
October-December 1955-2.474
October-December 1954-0.2254
October-December 1953-2.791
October-December 19520.2477
October-December 19510.96104
October-December 1950-2.058
October-December 1949-0.9132
October-December 1948-0.5642
October-December 19470.1872
October-December 19460.2477
October-December 1945-0.3851
October-December 19440.0965
October-December 1943-0.8833
October-December 19420.5889
October-December 19412.99129
October-December 1940-0.7439
October-December 1939-2.0010
October-December 1938-1.2322
October-December 1937-1.9811
October-December 1936-1.0727
October-December 19350.78100
October-December 19340.2074
October-December 1933-2.295
October-December 19320.5889
October-December 19313.62130
October-December 1930-1.1125
October-December 19290.1469
October-December 19282.19124
October-December 1927-0.7040
October-December 19260.3180
October-December 19250.7798
October-December 1924-1.0926
October-December 1923-0.9829
October-December 19220.5586
October-December 1921-0.2353
October-December 1920-0.8634
October-December 19190.87102
October-December 1918-0.1260
October-December 1917-2.226
October-December 1916-1.1524
October-December 1915-0.9331
October-December 19140.0664
October-December 19130.1368
October-December 1912-0.3950
October-December 19110.5485
October-December 1910-2.762
October-December 19091.86120
October-December 19080.4883
October-December 1907-0.1558
October-December 1906-0.4248
October-December 19051.26109
October-December 1904-1.6518
October-December 1903-0.4943
October-December 19021.68119
October-December 1901-1.8513
October-December 19000.7597
October-December 1899-1.4919
October-December 18980.84101
October-December 1897-2.039
October-December 18960.7195
October-December 18950.1570

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