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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 4

January 1965 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 1965 1-Month	-0.25	0.23	-0.48	61st Driest	Driest since: 1963	1981
January 1965 1-Month	-0.25	0.23	-0.48	71st Wettest	Wettest since: 1964	1979
Dec 1964–Jan 1965 2-Month	-0.62	0.12	-0.74	43rd Driest	Driest since: 1962	2002
Dec 1964–Jan 1965 2-Month	-0.62	0.12	-0.74	88th Wettest	Wettest since: 1964	1978
Nov 1964–Jan 1965 3-Month	-1.36	0.01	-1.37	20th Driest	Driest since: 1956	2002
Nov 1964–Jan 1965 3-Month	-1.36	0.01	-1.37	111th Wettest	Wettest since: 1964	2019
Oct 1964–Jan 1965 4-Month	-1.50	0.00	-1.50	16th Driest	Driest since: 1954	2002
Oct 1964–Jan 1965 4-Month	-1.50	0.00	-1.50	115th Wettest	Wettest since: 1964	2019
Sep 1964–Jan 1965 5-Month	-1.38	0.03	-1.41	19th Driest	Driest since: 1962	1931
Sep 1964–Jan 1965 5-Month	-1.38	0.03	-1.41	112th Wettest	Wettest since: 1964	2019
Aug 1964–Jan 1965 6-Month	-1.52	0.06	-1.58	15th Driest	Driest since: 1954	1931
Aug 1964–Jan 1965 6-Month	-1.52	0.06	-1.58	116th Wettest	Wettest since: 1964	2019
Jul 1964–Jan 1965 7-Month	-1.51	0.08	-1.59	9th Driest	Driest since: 1931	1931
Jul 1964–Jan 1965 7-Month	-1.51	0.08	-1.59	122nd Wettest	Wettest since: 1964	2019
Jun 1964–Jan 1965 8-Month	-1.56	0.09	-1.65	5th Driest	Driest since: 1931	1931
Jun 1964–Jan 1965 8-Month	-1.56	0.09	-1.65	126th Wettest	Wettest since: 1964	2019
May 1964–Jan 1965 9-Month	-1.74	0.05	-1.79	4th Driest	Driest since: 1931	1931
May 1964–Jan 1965 9-Month	-1.74	0.05	-1.79	127th Wettest	Wettest since: 1964	2019
Apr 1964–Jan 1965 10-Month	-1.27	0.04	-1.31	8th Driest	Driest since: 1931	1931
Apr 1964–Jan 1965 10-Month	-1.27	0.04	-1.31	123rd Wettest	Wettest since: 1964	2019
Mar 1964–Jan 1965 11-Month	-1.25	0.04	-1.29	7th Driest	Driest since: 1931	1931
Mar 1964–Jan 1965 11-Month	-1.25	0.04	-1.29	124th Wettest	Wettest since: 1964	2019
Feb 1964–Jan 1965 12-Month	-1.03	0.05	-1.08	8th Driest	Driest since: 1942	1931
Feb 1964–Jan 1965 12-Month	-1.03	0.05	-1.08	123rd Wettest	Wettest since: 1964	2019
Aug 1963–Jan 1965 18-Month	-0.91	0.05	-0.96	12th Driest	Driest since: 1955	1932
Aug 1963–Jan 1965 18-Month	-0.91	0.05	-0.96	118th Wettest	Wettest since: 1964	2019
Feb 1963–Jan 1965 24-Month	-0.90	0.05	-0.95	6th Driest	Driest since: 1932	1932
Feb 1963–Jan 1965 24-Month	-0.90	0.05	-0.95	124th Wettest	Wettest since: 1964	2020
Feb 1962–Jan 1965 36-Month	-0.72	0.05	-0.77	6th Driest	Driest since: 1933	1967
Feb 1962–Jan 1965 36-Month	-0.72	0.05	-0.77	123rd Wettest	Wettest since: 1964	2020
Feb 1961–Jan 1965 48-Month	-0.59	0.06	-0.65	8th Driest	Driest since: 1933	1967
Feb 1961–Jan 1965 48-Month	-0.59	0.06	-0.65	120th Wettest	Wettest since: 1964	1997
Feb 1960–Jan 1965 60-Month	-0.41	0.05	-0.46	10th Driest	Driest to Date	1967
Feb 1960–Jan 1965 60-Month	-0.41	0.05	-0.46	117th Wettest	Wettest since: 1964	1997

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 30, 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 4

January 1965 Palmer Z-Index Rankings

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