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 3

October 2005 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 2005 1-Month	6.49	0.11	6.38	130th Driest	Driest since: 2004	2024
October 2005 1-Month	6.49	0.11	6.38	1st Wettest	Wettest to Date	2005
Sep–Oct 2005 2-Month	1.46	0.10	1.36	99th Driest	Driest since: 2001	2024
Sep–Oct 2005 2-Month	1.46	0.10	1.36	32nd Wettest	Wettest since: 2004	2011
Aug–Oct 2005 3-Month	0.04	0.10	-0.06	65th Driest	Driest since: 2001	1930
Aug–Oct 2005 3-Month	0.04	0.10	-0.06	66th Wettest	Wettest since: 2004	2011
Jul–Oct 2005 4-Month	0.26	0.07	0.19	75th Driest	Driest since: 2002	1930
Jul–Oct 2005 4-Month	0.26	0.07	0.19	56th Wettest	Wettest since: 2004	2011
Jun–Oct 2005 5-Month	-0.12	0.07	-0.19	60th Driest	Driest since: 2002	2024
	-0.12	0.07	-0.19	71st Wettest	Wettest since: 2004	2018
	Ties: 1952
May–Oct 2005 6-Month	-0.44	0.00	-0.44	43rd Driest	Driest since: 2001	1964
	-0.44	0.00	-0.44	88th Wettest	Wettest since: 2004	2018
	Ties: 1932
Apr–Oct 2005 7-Month	-0.20	0.01	-0.21	51st Driest	Driest since: 2002	1963
Apr–Oct 2005 7-Month	-0.20	0.01	-0.21	80th Wettest	Wettest since: 2004	2018
Mar–Oct 2005 8-Month	-0.07	0.01	-0.08	57th Driest	Driest since: 2002	1930
Mar–Oct 2005 8-Month	-0.07	0.01	-0.08	74th Wettest	Wettest since: 2004	2011
Feb–Oct 2005 9-Month	-0.17	0.03	-0.20	48th Driest	Driest since: 2002	1963
	-0.17	0.03	-0.20	83rd Wettest	Wettest since: 2004	2018
	Ties: 1951
Jan–Oct 2005 10-Month	0.02	0.04	-0.02	62nd Driest	Driest since: 2002	1963
	0.02	0.04	-0.02	69th Wettest	Wettest since: 2004	2018
	Ties: 1913
Dec 2004–Oct 2005 11-Month	0.06	0.04	0.02	65th Driest	Driest since: 2002	1963
Dec 2004–Oct 2005 11-Month	0.06	0.04	0.02	65th Wettest	Wettest since: 2004	1975
Nov 2004–Oct 2005 12-Month	0.15	0.01	0.14	73rd Driest	Driest since: 2002	2002
	0.15	0.01	0.14	57th Wettest	Wettest since: 2004	2003
	Ties: 1905
May 2004–Oct 2005 18-Month	0.69	0.01	0.68	110th Driest	Driest since: 2002	1965
	0.69	0.01	0.68	20th Wettest	Wettest since: 2004	2019
	Ties: 1933
Nov 2003–Oct 2005 24-Month	0.58	0.01	0.57	110th Driest	Driest since: 2003	1966
Nov 2003–Oct 2005 24-Month	0.58	0.01	0.57	19th Wettest	Wettest since: 2004	2019
Nov 2002–Oct 2005 36-Month	0.90	0.01	0.89	125th Driest	Driest since: 2004	1965
Nov 2002–Oct 2005 36-Month	0.90	0.01	0.89	3rd Wettest	Wettest since: 1904	1904
Nov 2001–Oct 2005 48-Month	0.36	0.02	0.34	103rd Driest	Driest since: 2004	1966
Nov 2001–Oct 2005 48-Month	0.36	0.02	0.34	24th Wettest	Wettest since: 1996	2021
Nov 2000–Oct 2005 60-Month	0.16	0.02	0.14	83rd Driest	Driest since: 2004	1966
Nov 2000–Oct 2005 60-Month	0.16	0.02	0.14	43rd Wettest	Wettest since: 1998	1906

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 3

October 2005 Palmer Z-Index Rankings

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