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 4 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 4 Palmer Z-Index
October-December
Period
Z-Index
Rank
(out of 130)
October-December 2024-0.2458
October-December 2023-0.2160
October-December 2022-1.3217
October-December 20210.2578
October-December 2020-0.7631
October-December 20192.28121
October-December 20182.27120
October-December 20171.10100
October-December 20160.2073
October-December 20153.71130
October-December 20141.0699
October-December 2013-0.6237
October-December 2012-0.9127
October-December 2011-1.4014
October-December 2010-0.0365
October-December 20092.99128
October-December 20082.08119
October-December 20071.67111
October-December 20060.7993
October-December 2005-0.9426
October-December 2004-0.3649
October-December 2003-0.3551
October-December 20020.2476
October-December 2001-0.5539
October-December 2000-0.2557
October-December 1999-1.4412
October-December 19980.2578
October-December 1997-0.3353
October-December 19961.46106
October-December 1995-0.3747
October-December 19940.6084
October-December 19930.5182
October-December 19922.31122
October-December 19911.47107
October-December 1990-0.3747
October-December 1989-0.9525
October-December 1988-0.5341
October-December 19870.4381
October-December 19861.72113
October-December 1985-0.0863
October-December 19842.79126
October-December 19831.60110
October-December 19822.86127
October-December 1981-0.2855
October-December 1980-1.3716
October-December 19791.32103
October-December 19780.4080
October-December 19771.41105
October-December 1976-2.282
October-December 1975-0.3452
October-December 1974-0.8730
October-December 19731.91117
October-December 19722.48124
October-December 19711.30102
October-December 19701.50108
October-December 19690.6990
October-December 19682.43123
October-December 1967-1.1023
October-December 1966-1.5710
October-December 19650.0867
October-December 1964-0.3649
October-December 1963-1.855
October-December 1962-0.5341
October-December 19611.35104
October-December 1960-1.0424
October-December 19590.6689
October-December 1958-1.687
October-December 19572.00118
October-December 1956-1.2419
October-December 1955-2.481
October-December 1954-0.0266
October-December 1953-1.609
October-December 1952-0.2756
October-December 19510.7491
October-December 1950-0.6635
October-December 1949-1.4113
October-December 19480.6186
October-December 19470.1069
October-December 19461.0098
October-December 1945-0.7433
October-December 1944-0.4844
October-December 1943-0.7134
October-December 1942-0.5738
October-December 19411.85116
October-December 19400.3579
October-December 1939-2.163
October-December 1938-0.5043
October-December 1937-1.4911
October-December 1936-1.766
October-December 19350.1069
October-December 1934-0.9028
October-December 1933-1.864
October-December 1932-0.3846
October-December 19312.79126
October-December 1930-1.1721
October-December 1929-0.1062
October-December 19281.71112
October-December 1927-1.2718
October-December 19260.9797
October-December 19250.2275
October-December 1924-0.4844
October-December 1923-0.2259
October-December 1922-0.3254
October-December 1921-0.6536
October-December 19200.6186
October-December 19191.53109
October-December 19181.24101
October-December 1917-1.3915
October-December 1916-0.2160
October-December 19150.5583
October-December 19140.1170
October-December 1913-0.7631
October-December 19120.7592
October-December 19110.6488
October-December 1910-1.618
October-December 19093.53129
October-December 19080.9295
October-December 19070.2174
October-December 19060.6387
October-December 19050.8594
October-December 1904-0.9028
October-December 19030.1772
October-December 19021.74114
October-December 1901-0.0863
October-December 19000.9696
October-December 1899-0.5539
October-December 18980.1371
October-December 1897-1.1820
October-December 18961.82115
October-December 1895-1.1322

Citing This Page