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 4

November 2001 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
November 2001 1-Month	-4.14	-0.21	-3.93	2nd Driest	Driest since: 1930	1930
November 2001 1-Month	-4.14	-0.21	-3.93	129th Wettest	Wettest since: 2000	2018
Oct–Nov 2001 2-Month	-3.64	-0.12	-3.52	2nd Driest	Driest since: 1930	1930
Oct–Nov 2001 2-Month	-3.64	-0.12	-3.52	129th Wettest	Wettest since: 2000	1932
Sep–Nov 2001 3-Month	-2.65	-0.02	-2.63	2nd Driest	Driest since: 1930	1930
Sep–Nov 2001 3-Month	-2.65	-0.02	-2.63	129th Wettest	Wettest since: 2000	2018
Aug–Nov 2001 4-Month	-2.43	0.03	-2.46	2nd Driest	Driest since: 1930	1930
Aug–Nov 2001 4-Month	-2.43	0.03	-2.46	129th Wettest	Wettest since: 2000	2018
Jul–Nov 2001 5-Month	-2.37	0.07	-2.44	2nd Driest	Driest since: 1930	1930
Jul–Nov 2001 5-Month	-2.37	0.07	-2.44	129th Wettest	Wettest since: 2000	2018
Jun–Nov 2001 6-Month	-2.07	0.09	-2.16	3rd Driest	Driest since: 1991	1930
Jun–Nov 2001 6-Month	-2.07	0.09	-2.16	128th Wettest	Wettest since: 2000	2018
May–Nov 2001 7-Month	-1.98	0.04	-2.02	4th Driest	Driest since: 1991	1930
May–Nov 2001 7-Month	-1.98	0.04	-2.02	127th Wettest	Wettest since: 2000	2018
Apr–Nov 2001 8-Month	-1.94	0.04	-1.98	3rd Driest	Driest since: 1991	1930
Apr–Nov 2001 8-Month	-1.94	0.04	-1.98	128th Wettest	Wettest since: 2000	2018
Mar–Nov 2001 9-Month	-1.57	0.03	-1.60	3rd Driest	Driest since: 1991	1930
Mar–Nov 2001 9-Month	-1.57	0.03	-1.60	128th Wettest	Wettest since: 2000	2018
Feb–Nov 2001 10-Month	-1.59	0.04	-1.63	3rd Driest	Driest since: 1991	1930
Feb–Nov 2001 10-Month	-1.59	0.04	-1.63	128th Wettest	Wettest since: 2000	2018
Jan–Nov 2001 11-Month	-1.48	0.06	-1.54	3rd Driest	Driest since: 1991	1930
Jan–Nov 2001 11-Month	-1.48	0.06	-1.54	128th Wettest	Wettest since: 2000	2018
Dec 2000–Nov 2001 12-Month	-1.35	0.05	-1.40	2nd Driest	Driest since: 1930	1930
Dec 2000–Nov 2001 12-Month	-1.35	0.05	-1.40	128th Wettest	Wettest since: 2000	2018
Jun 2000–Nov 2001 18-Month	-0.88	0.06	-0.94	11th Driest	Driest since: 1966	1931
Jun 2000–Nov 2001 18-Month	-0.88	0.06	-0.94	119th Wettest	Wettest since: 2000	2019
Dec 1999–Nov 2001 24-Month	-0.64	0.05	-0.69	12th Driest	Driest since: 1992	1931
	-0.64	0.05	-0.69	117th Wettest	Wettest since: 2000	2019
	Ties: 1986
Dec 1998–Nov 2001 36-Month	-0.67	0.05	-0.72	7th Driest	Driest since: 1966	1966
Dec 1998–Nov 2001 36-Month	-0.67	0.05	-0.72	121st Wettest	Wettest since: 2000	2019
Dec 1997–Nov 2001 48-Month	-0.44	0.05	-0.49	12th Driest	Driest since: 1991	1966
Dec 1997–Nov 2001 48-Month	-0.44	0.05	-0.49	115th Wettest	Wettest since: 2000	1996
Dec 1996–Nov 2001 60-Month	-0.40	0.06	-0.46	9th Driest	Driest since: 1992	1966
Dec 1996–Nov 2001 60-Month	-0.40	0.06	-0.46	117th Wettest	Wettest since: 2000	1975

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

November 2001 Palmer Z-Index Rankings

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