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 6

December 1999 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1999 1-Month	-0.35	-0.19	-0.16	56th Driest	Driest since: 1998	1930
December 1999 1-Month	-0.35	-0.19	-0.16	75th Wettest	Wettest since: 1996	2008
Nov–Dec 1999 2-Month	-1.90	-0.18	-1.72	17th Driest	Driest since: 1997	1930
Nov–Dec 1999 2-Month	-1.90	-0.18	-1.72	114th Wettest	Wettest since: 1998	2019
Oct–Dec 1999 3-Month	-1.68	-0.13	-1.55	18th Driest	Driest since: 1997	1930
Oct–Dec 1999 3-Month	-1.68	-0.13	-1.55	113th Wettest	Wettest since: 1998	2019
Sep–Dec 1999 4-Month	-1.20	-0.16	-1.04	34th Driest	Driest since: 1998	1930
Sep–Dec 1999 4-Month	-1.20	-0.16	-1.04	97th Wettest	Wettest since: 1996	2019
Aug–Dec 1999 5-Month	-0.89	-0.16	-0.73	38th Driest	Driest since: 1998	1930
Aug–Dec 1999 5-Month	-0.89	-0.16	-0.73	93rd Wettest	Wettest since: 1996	1985
Jul–Dec 1999 6-Month	-0.08	-0.09	0.01	67th Driest	Driest since: 1998	1930
Jul–Dec 1999 6-Month	-0.08	-0.09	0.01	64th Wettest	Wettest since: 1996	1986
Jun–Dec 1999 7-Month	0.17	-0.08	0.25	77th Driest	Driest since: 1998	1930
	0.17	-0.08	0.25	54th Wettest	Wettest since: 1996	1986
	Ties: 1911, 1974
May–Dec 1999 8-Month	0.04	-0.05	0.09	73rd Driest	Driest since: 1998	1930
May–Dec 1999 8-Month	0.04	-0.05	0.09	58th Wettest	Wettest since: 1996	2019
Apr–Dec 1999 9-Month	0.15	-0.03	0.18	75th Driest	Driest since: 1998	1930
Apr–Dec 1999 9-Month	0.15	-0.03	0.18	56th Wettest	Wettest since: 1996	2019
Mar–Dec 1999 10-Month	-0.02	-0.02	0.00	63rd Driest	Driest since: 1998	1930
Mar–Dec 1999 10-Month	-0.02	-0.02	0.00	68th Wettest	Wettest since: 1996	2019
Feb–Dec 1999 11-Month	-0.06	-0.01	-0.05	62nd Driest	Driest since: 1998	1930
Feb–Dec 1999 11-Month	-0.06	-0.01	-0.05	69th Wettest	Wettest since: 1996	2019
Jan–Dec 1999 12-Month	0.17	0.00	0.17	72nd Driest	Driest since: 1998	1930
Jan–Dec 1999 12-Month	0.17	0.00	0.17	59th Wettest	Wettest since: 1996	2019
Jul 1998–Dec 1999 18-Month	-0.55	-0.03	-0.52	21st Driest	Driest since: 1998	1931
Jul 1998–Dec 1999 18-Month	-0.55	-0.03	-0.52	109th Wettest	Wettest since: 1997	1986
Jan 1998–Dec 1999 24-Month	-0.38	0.00	-0.38	25th Driest	Driest since: 1998	1931
	-0.38	0.00	-0.38	105th Wettest	Wettest since: 1997	2019
	Ties: 1989
Jan 1997–Dec 1999 36-Month	-0.27	0.00	-0.27	24th Driest	Driest since: 1989	1936
Jan 1997–Dec 1999 36-Month	-0.27	0.00	-0.27	105th Wettest	Wettest since: 1998	2019
Jan 1996–Dec 1999 48-Month	0.00	0.00	0.00	62nd Driest	Driest since: 1998	1936
Jan 1996–Dec 1999 48-Month	0.00	0.00	0.00	66th Wettest	Wettest since: 1997	2019
Jan 1995–Dec 1999 60-Month	-0.05	0.00	-0.05	54th Driest	Driest since: 1981	1934
Jan 1995–Dec 1999 60-Month	-0.05	0.00	-0.05	73rd Wettest	Wettest since: 1998	2021

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 22, 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 6

December 1999 Palmer Z-Index Rankings

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