Climate at a Glance | Divisional Rankings | National Centers for Environmental Information (NCEI)

Divisional Rankings

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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.

Michigan, Climate Division 7

October 1989 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1989 1-Month	-0.93	0.02	-0.95	39th Driest	Driest since: 1982	1963
	-0.93	0.02	-0.95	92nd Wettest	Wettest since: 1988	1954
	Ties: 1918
Sep–Oct 1989 2-Month	-0.99	-0.07	-0.92	39th Driest	Driest since: 1982	1908
Sep–Oct 1989 2-Month	-0.99	-0.07	-0.92	92nd Wettest	Wettest since: 1988	1986
Aug–Oct 1989 3-Month	-0.44	-0.02	-0.42	61st Driest	Driest since: 1982	1930
Aug–Oct 1989 3-Month	-0.44	-0.02	-0.42	70th Wettest	Wettest since: 1988	1986
Jul–Oct 1989 4-Month	-0.65	0.07	-0.72	36th Driest	Driest since: 1979	1930
Jul–Oct 1989 4-Month	-0.65	0.07	-0.72	95th Wettest	Wettest since: 1988	1986
Jun–Oct 1989 5-Month	-0.03	0.06	-0.09	71st Driest	Driest since: 1988	1930
Jun–Oct 1989 5-Month	-0.03	0.06	-0.09	60th Wettest	Wettest since: 1987	1986
May–Oct 1989 6-Month	0.20	0.09	0.11	74th Driest	Driest since: 1988	1934
May–Oct 1989 6-Month	0.20	0.09	0.11	57th Wettest	Wettest since: 1986	1986
Apr–Oct 1989 7-Month	0.04	0.11	-0.07	65th Driest	Driest since: 1988	1934
Apr–Oct 1989 7-Month	0.04	0.11	-0.07	66th Wettest	Wettest since: 1986	1986
Mar–Oct 1989 8-Month	0.06	0.10	-0.04	65th Driest	Driest since: 1988	1934
Mar–Oct 1989 8-Month	0.06	0.10	-0.04	66th Wettest	Wettest since: 1986	1902
Feb–Oct 1989 9-Month	-0.09	0.09	-0.18	56th Driest	Driest since: 1988	1934
Feb–Oct 1989 9-Month	-0.09	0.09	-0.18	75th Wettest	Wettest since: 1986	1986
Jan–Oct 1989 10-Month	-0.11	0.09	-0.20	52nd Driest	Driest since: 1988	1931
	-0.11	0.09	-0.20	79th Wettest	Wettest since: 1986	1986
	Ties: 1913
Dec 1988–Oct 1989 11-Month	-0.13	0.07	-0.20	46th Driest	Driest since: 1988	1931
	-0.13	0.07	-0.20	84th Wettest	Wettest since: 1986	1986
	Ties: 1982
Nov 1988–Oct 1989 12-Month	0.20	0.06	0.14	71st Driest	Driest since: 1988	1931
	0.20	0.06	0.14	59th Wettest	Wettest since: 1986	1986
	Ties: 1968
May 1988–Oct 1989 18-Month	-0.30	0.07	-0.37	30th Driest	Driest since: 1988	1931
May 1988–Oct 1989 18-Month	-0.30	0.07	-0.37	100th Wettest	Wettest since: 1987	1903
Nov 1987–Oct 1989 24-Month	-0.14	0.06	-0.20	40th Driest	Driest since: 1988	1931
Nov 1987–Oct 1989 24-Month	-0.14	0.06	-0.20	89th Wettest	Wettest since: 1987	1986
Nov 1986–Oct 1989 36-Month	-0.31	0.07	-0.38	22nd Driest	Driest since: 1979	1965
	-0.31	0.07	-0.38	106th Wettest	Wettest since: 1988	1986
	Ties: 1939
Nov 1985–Oct 1989 48-Month	0.25	0.07	0.18	75th Driest	Driest since: 1981	1966
Nov 1985–Oct 1989 48-Month	0.25	0.07	0.18	52nd Wettest	Wettest since: 1988	1986
Nov 1984–Oct 1989 60-Month	0.49	0.07	0.42	107th Driest	Driest since: 1983	1934
	0.49	0.07	0.42	19th Wettest	Wettest since: 1988	1986
	Ties: 1907

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Michigan, Climate Division 7

October 1989 Palmer Z-Index Rankings

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