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 5

October 1899 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1899 1-Month	-1.67	0.02	-1.69	23rd Driest	Driest since: 1897	1963
October 1899 1-Month	-1.67	0.02	-1.69	108th Wettest	Wettest since: 1898	1976
Sep–Oct 1899 2-Month	-0.31	0.09	-0.40	53rd Driest	Driest since: 1897	1930
Sep–Oct 1899 2-Month	-0.31	0.09	-0.40	78th Wettest	Wettest since: 1898	2011
Aug–Oct 1899 3-Month	-0.04	0.10	-0.14	62nd Driest	Driest since: 1897	1930
Aug–Oct 1899 3-Month	-0.04	0.10	-0.14	69th Wettest	Wettest since: 1898	2011
Jul–Oct 1899 4-Month	-0.34	0.08	-0.42	48th Driest	Driest since: 1895	1930
Jul–Oct 1899 4-Month	-0.34	0.08	-0.42	83rd Wettest	Wettest since: 1898	2018
Jun–Oct 1899 5-Month	-0.30	0.10	-0.40	49th Driest	Driest since: 1897	1930
Jun–Oct 1899 5-Month	-0.30	0.10	-0.40	82nd Wettest	Wettest since: 1898	2018
May–Oct 1899 6-Month	-0.33	0.04	-0.37	48th Driest	Driest since: 1896	1991
May–Oct 1899 6-Month	-0.33	0.04	-0.37	83rd Wettest	Wettest since: 1898	2018
Apr–Oct 1899 7-Month	-0.67	0.07	-0.74	29th Driest	Driest since: 1896	1991
Apr–Oct 1899 7-Month	-0.67	0.07	-0.74	102nd Wettest	Wettest since: 1898	2011
Mar–Oct 1899 8-Month	-0.38	0.07	-0.45	42nd Driest	Driest since: 1896	1991
Mar–Oct 1899 8-Month	-0.38	0.07	-0.45	89th Wettest	Wettest since: 1898	2011
Feb–Oct 1899 9-Month	-0.04	0.07	-0.11	53rd Driest	Driest since: 1896	1991
Feb–Oct 1899 9-Month	-0.04	0.07	-0.11	78th Wettest	Wettest since: 1898	2011
Jan–Oct 1899 10-Month	0.03	0.09	-0.06	59th Driest	Driest since: 1897	1991
Jan–Oct 1899 10-Month	0.03	0.09	-0.06	72nd Wettest	Wettest since: 1898	2011
Dec 1898–Oct 1899 11-Month	0.09	0.09	0.00	66th Driest	Driest since: 1897	1930
Dec 1898–Oct 1899 11-Month	0.09	0.09	0.00	64th Wettest	Wettest since: 1898	2011
Nov 1898–Oct 1899 12-Month	0.13	0.06	0.07	67th Driest	Driest since: 1897	1931
Nov 1898–Oct 1899 12-Month	0.13	0.06	0.07	63rd Wettest	Wettest since: 1898	2011
May 1898–Oct 1899 18-Month	0.11	0.05	0.06	71st Driest	Driest since: 1897	1931
May 1898–Oct 1899 18-Month	0.11	0.05	0.06	59th Wettest	Wettest since: 1898	2019
Nov 1897–Oct 1899 24-Month	0.28	0.05	0.23	81st Driest	Driest since: 1898	1931
Nov 1897–Oct 1899 24-Month	0.28	0.05	0.23	48th Wettest	Wettest to Date	2019
Nov 1896–Oct 1899 36-Month	0.10	0.05	0.05	61st Driest	Driest since: 1898	1932
Nov 1896–Oct 1899 36-Month	0.10	0.05	0.05	67th Wettest	Wettest to Date	2019
Nov 1895–Oct 1899 48-Month	-0.02	0.05	-0.07	47th Driest	Driest to Date	1966
Nov 1895–Oct 1899 48-Month	-0.02	0.05	-0.07	80th Wettest	Wettest to Date	2006

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 5

October 1899 Palmer Z-Index Rankings

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