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
Iowa, Climate Division 7 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 7 Palmer Z-Index
October-December
Period
Z-Index
Rank
(out of 130)
October-December 2024-0.3252
October-December 2023-1.4218
October-December 2022-1.6413
October-December 20210.7192
October-December 2020-1.2521
October-December 20191.46113
October-December 20182.50124
October-December 20170.8795
October-December 20160.0070
October-December 20153.30129
October-December 20141.13101
October-December 2013-0.5045
October-December 2012-0.5941
October-December 2011-0.2257
October-December 2010-0.2160
October-December 20092.55125
October-December 20081.50114
October-December 20072.44122
October-December 20060.9396
October-December 2005-1.5017
October-December 2004-1.0131
October-December 2003-0.1064
October-December 2002-0.4546
October-December 2001-1.0430
October-December 2000-0.5543
October-December 1999-1.6612
October-December 1998-0.0667
October-December 19971.0898
October-December 19961.44111
October-December 1995-1.2122
October-December 19940.1476
October-December 19930.3379
October-December 19922.02120
October-December 19911.45112
October-December 1990-0.5642
October-December 1989-0.3153
October-December 1988-1.6910
October-December 19870.6991
October-December 19861.57115
October-December 19850.3680
October-December 19841.1099
October-December 19831.11100
October-December 19821.99119
October-December 19810.7894
October-December 1980-0.4546
October-December 19790.6788
October-December 19780.3178
October-December 19771.61116
October-December 1976-2.046
October-December 1975-0.9233
October-December 1974-0.2455
October-December 19732.48123
October-December 19722.73126
October-December 19711.42110
October-December 19701.24103
October-December 19690.7493
October-December 19681.30105
October-December 1967-0.5444
October-December 1966-1.6910
October-December 19650.0373
October-December 1964-0.2061
October-December 1963-2.273
October-December 1962-0.2257
October-December 19611.69117
October-December 1960-0.1563
October-December 19590.9497
October-December 1958-0.8834
October-December 19571.24103
October-December 1956-1.4218
October-December 1955-2.771
October-December 1954-0.6937
October-December 1953-2.312
October-December 1952-0.0469
October-December 19510.5984
October-December 19500.0574
October-December 1949-1.1028
October-December 19480.4181
October-December 1947-0.6040
October-December 19460.6686
October-December 1945-1.1227
October-December 19440.0373
October-December 1943-1.2720
October-December 1942-0.4348
October-December 19413.40130
October-December 19400.0271
October-December 1939-1.947
October-December 1938-1.6216
October-December 1937-2.155
October-December 1936-1.1824
October-December 19350.6788
October-December 1934-0.6339
October-December 1933-1.869
October-December 19320.1777
October-December 19313.27128
October-December 1930-1.2023
October-December 19291.35107
October-December 19282.03121
October-December 1927-1.6413
October-December 19260.6085
October-December 1925-0.0667
October-December 1924-1.1426
October-December 1923-1.1525
October-December 19220.1476
October-December 1921-0.6838
October-December 1920-0.3750
October-December 19191.40109
October-December 19181.25104
October-December 1917-2.254
October-December 1916-0.7936
October-December 1915-0.2654
October-December 1914-0.0469
October-December 19130.6991
October-December 1912-0.3551
October-December 1911-0.0965
October-December 1910-1.928
October-December 19093.07127
October-December 19080.4382
October-December 19070.6991
October-December 1906-0.4249
October-December 19051.31106
October-December 1904-1.1028
October-December 1903-0.2257
October-December 19021.78118
October-December 1901-1.0131
October-December 19000.5984
October-December 1899-0.2455
October-December 1898-0.1762
October-December 1897-1.6315
October-December 18961.36108
October-December 1895-0.8135

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