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.

Massachusetts, Climate Division 2

December 1991 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1991 1-Month	-0.41	-0.02	-0.39	57th Driest	Driest since: 1989	1943
December 1991 1-Month	-0.41	-0.02	-0.39	74th Wettest	Wettest since: 1990	1901
Nov–Dec 1991 2-Month	0.34	-0.13	0.47	84th Driest	Driest since: 1990	2001
Nov–Dec 1991 2-Month	0.34	-0.13	0.47	47th Wettest	Wettest since: 1986	1972
Oct–Dec 1991 3-Month	0.26	-0.11	0.37	78th Driest	Driest since: 1988	2001
Oct–Dec 1991 3-Month	0.26	-0.11	0.37	53rd Wettest	Wettest since: 1990	2005
Sep–Dec 1991 4-Month	1.08	-0.09	1.17	110th Driest	Driest since: 1990	1914
	1.08	-0.09	1.17	21st Wettest	Wettest since: 1977	2018
	Ties: 1955
Aug–Dec 1991 5-Month	1.72	-0.06	1.78	122nd Driest	Driest since: 1990	2001
Aug–Dec 1991 5-Month	1.72	-0.06	1.78	9th Wettest	Wettest since: 1975	2011
Jul–Dec 1991 6-Month	1.29	-0.03	1.32	114th Driest	Driest since: 1990	1949
Jul–Dec 1991 6-Month	1.29	-0.03	1.32	17th Wettest	Wettest since: 1989	2018
Jun–Dec 1991 7-Month	0.93	-0.04	0.97	107th Driest	Driest since: 1990	1949
	0.93	-0.04	0.97	24th Wettest	Wettest since: 1989	1938
	Ties: 1951
May–Dec 1991 8-Month	0.79	-0.06	0.85	106th Driest	Driest since: 1988	1964
May–Dec 1991 8-Month	0.79	-0.06	0.85	25th Wettest	Wettest since: 1990	1938
Apr–Dec 1991 9-Month	0.56	-0.06	0.62	96th Driest	Driest since: 1988	1964
Apr–Dec 1991 9-Month	0.56	-0.06	0.62	35th Wettest	Wettest since: 1990	1996
Mar–Dec 1991 10-Month	0.54	-0.05	0.59	99th Driest	Driest since: 1988	1965
Mar–Dec 1991 10-Month	0.54	-0.05	0.59	32nd Wettest	Wettest since: 1990	1972
Feb–Dec 1991 11-Month	0.34	-0.05	0.39	89th Driest	Driest since: 1988	1965
	0.34	-0.05	0.39	42nd Wettest	Wettest since: 1990	2008
	Ties: 1936
Jan–Dec 1991 12-Month	0.27	-0.05	0.32	89th Driest	Driest since: 1988	1965
	0.27	-0.05	0.32	42nd Wettest	Wettest since: 1990	2008
	Ties: 1922
Jul 1990–Dec 1991 18-Month	0.48	-0.05	0.53	103rd Driest	Driest since: 1988	1965
Jul 1990–Dec 1991 18-Month	0.48	-0.05	0.53	27th Wettest	Wettest since: 1990	2019
Jan 1990–Dec 1991 24-Month	0.48	-0.05	0.53	108th Driest	Driest since: 1989	1965
Jan 1990–Dec 1991 24-Month	0.48	-0.05	0.53	22nd Wettest	Wettest since: 1990	2009
Jan 1989–Dec 1991 36-Month	0.57	-0.05	0.62	119th Driest	Driest since: 1990	1965
Jan 1989–Dec 1991 36-Month	0.57	-0.05	0.62	10th Wettest	Wettest since: 1984	2010
Jan 1988–Dec 1991 48-Month	0.40	-0.05	0.45	109th Driest	Driest since: 1990	1966
Jan 1988–Dec 1991 48-Month	0.40	-0.05	0.45	19th Wettest	Wettest since: 1986	2011
Jan 1987–Dec 1991 60-Month	0.27	-0.05	0.32	97th Driest	Driest since: 1989	1966
	0.27	-0.05	0.32	30th Wettest	Wettest since: 1990	2009
	Ties: 1973, 1983

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

Massachusetts, Climate Division 2

December 1991 Palmer Z-Index Rankings

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