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 1988 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1988 1-Month	-0.57	0.11	-0.68	51st Driest	Driest since: 1986	2024
	-0.57	0.11	-0.68	80th Wettest	Wettest since: 1987	2005
	Ties: 1950
Sep–Oct 1988 2-Month	-0.71	0.10	-0.81	45th Driest	Driest since: 1986	2024
Sep–Oct 1988 2-Month	-0.71	0.10	-0.81	86th Wettest	Wettest since: 1987	2011
Aug–Oct 1988 3-Month	-0.79	0.10	-0.89	37th Driest	Driest since: 1986	1930
Aug–Oct 1988 3-Month	-0.79	0.10	-0.89	94th Wettest	Wettest since: 1987	2011
Jul–Oct 1988 4-Month	-0.07	0.07	-0.14	58th Driest	Driest since: 1986	1930
	-0.07	0.07	-0.14	73rd Wettest	Wettest since: 1987	2011
	Ties: 1898
Jun–Oct 1988 5-Month	-0.71	0.07	-0.78	31st Driest	Driest since: 1986	2024
Jun–Oct 1988 5-Month	-0.71	0.07	-0.78	100th Wettest	Wettest since: 1987	2018
May–Oct 1988 6-Month	-0.27	0.00	-0.27	53rd Driest	Driest since: 1986	1964
May–Oct 1988 6-Month	-0.27	0.00	-0.27	78th Wettest	Wettest since: 1987	2018
Apr–Oct 1988 7-Month	-0.37	0.01	-0.38	41st Driest	Driest since: 1986	1963
Apr–Oct 1988 7-Month	-0.37	0.01	-0.38	90th Wettest	Wettest since: 1987	2018
Mar–Oct 1988 8-Month	-0.55	0.01	-0.56	30th Driest	Driest since: 1986	1930
Mar–Oct 1988 8-Month	-0.55	0.01	-0.56	101st Wettest	Wettest since: 1987	2011
Feb–Oct 1988 9-Month	-0.38	0.03	-0.41	38th Driest	Driest since: 1987	1963
Feb–Oct 1988 9-Month	-0.38	0.03	-0.41	93rd Wettest	Wettest since: 1984	2018
Jan–Oct 1988 10-Month	-0.40	0.04	-0.44	35th Driest	Driest since: 1986	1963
Jan–Oct 1988 10-Month	-0.40	0.04	-0.44	96th Wettest	Wettest since: 1987	2018
Dec 1987–Oct 1988 11-Month	-0.51	0.04	-0.55	26th Driest	Driest since: 1986	1963
	-0.51	0.04	-0.55	104th Wettest	Wettest since: 1987	1975
	Ties: 1931
Nov 1987–Oct 1988 12-Month	-0.41	0.01	-0.42	37th Driest	Driest since: 1986	2002
Nov 1987–Oct 1988 12-Month	-0.41	0.01	-0.42	93rd Wettest	Wettest since: 1987	2003
May 1987–Oct 1988 18-Month	-0.29	0.01	-0.30	37th Driest	Driest since: 1987	1965
May 1987–Oct 1988 18-Month	-0.29	0.01	-0.30	93rd Wettest	Wettest since: 1986	2019
Nov 1986–Oct 1988 24-Month	-0.16	0.01	-0.17	43rd Driest	Driest since: 1987	1966
Nov 1986–Oct 1988 24-Month	-0.16	0.01	-0.17	86th Wettest	Wettest since: 1985	2019
Nov 1985–Oct 1988 36-Month	-0.28	0.01	-0.29	23rd Driest	Driest since: 1987	1965
	-0.28	0.01	-0.29	105th Wettest	Wettest since: 1986	1904
	Ties: 1911
Nov 1984–Oct 1988 48-Month	-0.40	0.02	-0.42	12th Driest	Driest since: 1983	1966
	-0.40	0.02	-0.42	115th Wettest	Wettest since: 1987	2021
	Ties: 1983
Nov 1983–Oct 1988 60-Month	-0.07	0.02	-0.09	40th Driest	Driest since: 1984	1966
	-0.07	0.02	-0.09	86th Wettest	Wettest since: 1987	1906
	Ties: 1984

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 1988 Palmer Z-Index Rankings

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