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 1

October 1984 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1984 1-Month	-1.72	0.09	-1.81	20th Driest	Driest since: 1982	1963
	-1.72	0.09	-1.81	111th Wettest	Wettest since: 1983	2005
	Ties: 1924
Sep–Oct 1984 2-Month	-2.03	0.07	-2.10	10th Driest	Driest since: 1964	1964
Sep–Oct 1984 2-Month	-2.03	0.07	-2.10	121st Wettest	Wettest since: 1983	2011
Aug–Oct 1984 3-Month	-1.65	0.04	-1.69	11th Driest	Driest since: 1980	1964
Aug–Oct 1984 3-Month	-1.65	0.04	-1.69	120th Wettest	Wettest since: 1983	2011
Jul–Oct 1984 4-Month	-0.63	0.01	-0.64	34th Driest	Driest since: 1983	1964
	-0.63	0.01	-0.64	97th Wettest	Wettest since: 1981	2011
	Ties: 1922
Jun–Oct 1984 5-Month	-0.50	0.03	-0.53	41st Driest	Driest since: 1983	1964
Jun–Oct 1984 5-Month	-0.50	0.03	-0.53	90th Wettest	Wettest since: 1981	2011
May–Oct 1984 6-Month	0.34	-0.02	0.36	84th Driest	Driest since: 1983	1964
	0.34	-0.02	0.36	47th Wettest	Wettest since: 1979	2011
	Ties: 1967, 1979
Apr–Oct 1984 7-Month	0.59	-0.02	0.61	98th Driest	Driest since: 1983	1964
Apr–Oct 1984 7-Month	0.59	-0.02	0.61	33rd Wettest	Wettest since: 1976	2011
Mar–Oct 1984 8-Month	0.61	-0.01	0.62	100th Driest	Driest since: 1983	1964
Mar–Oct 1984 8-Month	0.61	-0.01	0.62	31st Wettest	Wettest since: 1977	2011
Feb–Oct 1984 9-Month	0.68	0.00	0.68	104th Driest	Driest since: 1983	1964
Feb–Oct 1984 9-Month	0.68	0.00	0.68	27th Wettest	Wettest since: 1976	2011
Jan–Oct 1984 10-Month	0.44	0.01	0.43	97th Driest	Driest since: 1983	1991
Jan–Oct 1984 10-Month	0.44	0.01	0.43	34th Wettest	Wettest since: 1979	2011
Dec 1983–Oct 1984 11-Month	0.83	0.01	0.82	112th Driest	Driest since: 1983	1964, 1980
Dec 1983–Oct 1984 11-Month	0.83	0.01	0.82	18th Wettest	Wettest since: 1979	2011
Nov 1983–Oct 1984 12-Month	0.85	-0.01	0.86	110th Driest	Driest since: 1983	1965
Nov 1983–Oct 1984 12-Month	0.85	-0.01	0.86	20th Wettest	Wettest since: 1975	2011
May 1983–Oct 1984 18-Month	0.31	-0.02	0.33	85th Driest	Driest since: 1983	1965
May 1983–Oct 1984 18-Month	0.31	-0.02	0.33	45th Wettest	Wettest since: 1979	2019
Nov 1982–Oct 1984 24-Month	0.49	-0.02	0.51	103rd Driest	Driest since: 1983	1965
Nov 1982–Oct 1984 24-Month	0.49	-0.02	0.51	26th Wettest	Wettest since: 1976	2019
Nov 1981–Oct 1984 36-Month	0.19	-0.01	0.20	84th Driest	Driest since: 1983	1965
Nov 1981–Oct 1984 36-Month	0.19	-0.01	0.20	44th Wettest	Wettest since: 1979	1975
Nov 1980–Oct 1984 48-Month	0.05	-0.01	0.06	62nd Driest	Driest since: 1983	1966
Nov 1980–Oct 1984 48-Month	0.05	-0.01	0.06	65th Wettest	Wettest since: 1979	1976
Nov 1979–Oct 1984 60-Month	-0.18	-0.01	-0.17	30th Driest	Driest since: 1983	1966
Nov 1979–Oct 1984 60-Month	-0.18	-0.01	-0.17	96th Wettest	Wettest since: 1981	1976

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on April 1, 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 1

October 1984 Palmer Z-Index Rankings

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