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.

Pennsylvania, Climate Division 2

December 1986 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1986 1-Month	0.94	0.09	0.85	90th Driest	Driest since: 1985	1955
December 1986 1-Month	0.94	0.09	0.85	41st Wettest	Wettest since: 1983	1996
Nov–Dec 1986 2-Month	1.59	-0.09	1.68	120th Driest	Driest since: 1985	1931
Nov–Dec 1986 2-Month	1.59	-0.09	1.68	11th Wettest	Wettest since: 1983	1972
Oct–Dec 1986 3-Month	0.65	-0.02	0.67	91st Driest	Driest since: 1985	1930
Oct–Dec 1986 3-Month	0.65	-0.02	0.67	40th Wettest	Wettest since: 1983	1996
Sep–Dec 1986 4-Month	0.28	0.00	0.28	70th Driest	Driest since: 1984	2024
Sep–Dec 1986 4-Month	0.28	0.00	0.28	61st Wettest	Wettest since: 1985	2018
Aug–Dec 1986 5-Month	0.36	0.02	0.34	74th Driest	Driest since: 1984	1930
	0.36	0.02	0.34	57th Wettest	Wettest since: 1985	2011
	Ties: 1969
Jul–Dec 1986 6-Month	0.35	0.01	0.34	79th Driest	Driest since: 1984	1930
	0.35	0.01	0.34	52nd Wettest	Wettest since: 1985	2018
	Ties: 1906, 1974
Jun–Dec 1986 7-Month	0.24	0.02	0.22	69th Driest	Driest since: 1984	1930
Jun–Dec 1986 7-Month	0.24	0.02	0.22	62nd Wettest	Wettest since: 1985	2018
May–Dec 1986 8-Month	-0.05	-0.02	-0.03	59th Driest	Driest since: 1982	1964
	-0.05	-0.02	-0.03	72nd Wettest	Wettest since: 1985	2018
	Ties: 1905
Apr–Dec 1986 9-Month	0.03	-0.01	0.04	63rd Driest	Driest since: 1985	1930
	0.03	-0.01	0.04	68th Wettest	Wettest since: 1984	2018
	Ties: 1958
Mar–Dec 1986 10-Month	-0.07	0.00	-0.07	56th Driest	Driest since: 1985	1930
Mar–Dec 1986 10-Month	-0.07	0.00	-0.07	75th Wettest	Wettest since: 1984	2011
Feb–Dec 1986 11-Month	0.05	0.02	0.03	65th Driest	Driest since: 1985	1930
Feb–Dec 1986 11-Month	0.05	0.02	0.03	66th Wettest	Wettest since: 1984	2018
Jan–Dec 1986 12-Month	0.11	0.03	0.08	72nd Driest	Driest since: 1985	1930
Jan–Dec 1986 12-Month	0.11	0.03	0.08	59th Wettest	Wettest since: 1984	2018
Jul 1985–Dec 1986 18-Month	0.21	0.02	0.19	76th Driest	Driest since: 1985	1965
	0.21	0.02	0.19	54th Wettest	Wettest since: 1984	2019
	Ties: 1921
Jan 1985–Dec 1986 24-Month	-0.19	0.03	-0.22	38th Driest	Driest since: 1981	1931
Jan 1985–Dec 1986 24-Month	-0.19	0.03	-0.22	92nd Wettest	Wettest since: 1985	2019
Jan 1984–Dec 1986 36-Month	-0.03	0.03	-0.06	51st Driest	Driest since: 1982	1965
	-0.03	0.03	-0.06	78th Wettest	Wettest since: 1985	2020
	Ties: 1950, 1961
Jan 1983–Dec 1986 48-Month	0.21	0.03	0.18	85th Driest	Driest since: 1985	1966
Jan 1983–Dec 1986 48-Month	0.21	0.03	0.18	43rd Wettest	Wettest since: 1984	2021
Jan 1982–Dec 1986 60-Month	0.16	0.03	0.13	78th Driest	Driest since: 1985	1966
Jan 1982–Dec 1986 60-Month	0.16	0.03	0.13	49th Wettest	Wettest since: 1980	1976, 1979, 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

Pennsylvania, Climate Division 2

December 1986 Palmer Z-Index Rankings

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