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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Illinois, Climate Division 3 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
Illinois, Climate Division 3 Palmer Z-Index
October-December
Period
Z-Index
Rank
(out of 130)
October-December 2024-0.7546
October-December 2023-1.2626
October-December 2022-0.8942
October-December 20210.7392
October-December 2020-0.8942
October-December 20190.9299
October-December 20182.03121
October-December 2017-0.3363
October-December 2016-0.9141
October-December 20152.35125
October-December 20140.8094
October-December 2013-0.9637
October-December 2012-0.3662
October-December 20110.1375
October-December 2010-0.3064
October-December 20093.27129
October-December 20080.97100
October-December 2007-1.2228
October-December 2006-0.2170
October-December 2005-2.149
October-December 20042.12122
October-December 20031.43111
October-December 2002-1.0136
October-December 20010.5588
October-December 2000-0.5852
October-December 1999-1.9214
October-December 19981.31110
October-December 1997-0.4955
October-December 1996-1.3323
October-December 1995-0.4460
October-December 19940.3781
October-December 19930.3178
October-December 19922.48126
October-December 19911.87118
October-December 19901.16104
October-December 1989-2.266
October-December 1988-1.0435
October-December 1987-0.4757
October-December 19861.69116
October-December 19853.82130
October-December 19842.20123
October-December 19831.28108
October-December 19822.81127
October-December 19810.4283
October-December 19800.4785
October-December 1979-1.1631
October-December 1978-0.2866
October-December 19771.89119
October-December 1976-1.3420
October-December 1975-0.4757
October-December 19740.3380
October-December 19732.26124
October-December 19720.8897
October-December 1971-0.0473
October-December 19700.5187
October-December 19691.49113
October-December 19680.6690
October-December 19671.93120
October-December 1966-0.7249
October-December 1965-0.2866
October-December 1964-1.9613
October-December 1963-2.663
October-December 1962-0.4161
October-December 19611.07102
October-December 1960-1.1332
October-December 19590.7493
October-December 1958-0.9340
October-December 19570.8595
October-December 1956-2.0512
October-December 1955-0.8245
October-December 19540.3380
October-December 1953-2.781
October-December 1952-0.7447
October-December 19510.4684
October-December 1950-2.177
October-December 1949-0.5553
October-December 1948-0.8544
October-December 1947-0.9439
October-December 19461.24106
October-December 1945-0.2469
October-December 1944-0.6650
October-December 1943-1.0934
October-December 19421.25107
October-December 19413.16128
October-December 1940-1.2030
October-December 1939-1.8615
October-December 1938-1.1133
October-December 1937-1.2527
October-December 1936-0.4856
October-December 19350.3882
October-December 19340.6389
October-December 1933-2.345
October-December 19321.45112
October-December 19310.9098
October-December 1930-1.4419
October-December 19290.4886
October-December 19281.55115
October-December 19271.84117
October-December 19261.31110
October-December 19251.17105
October-December 1924-0.2469
October-December 1923-0.5054
October-December 1922-1.3323
October-December 19210.0074
October-December 1920-2.1310
October-December 1919-0.6351
October-December 19180.2277
October-December 1917-1.6817
October-December 1916-1.3420
October-December 1915-0.0771
October-December 1914-2.0611
October-December 1913-1.7116
October-December 1912-0.4559
October-December 19111.08103
October-December 1910-2.514
October-December 19091.53114
October-December 1908-1.4518
October-December 1907-0.7348
October-December 1906-0.9538
October-December 19050.1776
October-December 1904-1.2725
October-December 1903-0.2567
October-December 19020.8897
October-December 1901-2.712
October-December 1900-1.2228
October-December 1899-1.3420
October-December 18980.6891
October-December 1897-2.158
October-December 1896-0.0672
October-December 18951.06101

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