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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 1

October 1986 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1986 1-Month	-0.28	0.09	-0.37	59th Driest	Driest since: 1985	1963
October 1986 1-Month	-0.28	0.09	-0.37	72nd Wettest	Wettest since: 1983	2005
Sep–Oct 1986 2-Month	-0.72	0.07	-0.79	41st Driest	Driest since: 1984	1964
Sep–Oct 1986 2-Month	-0.72	0.07	-0.79	90th Wettest	Wettest since: 1985	2011
Aug–Oct 1986 3-Month	-0.15	0.04	-0.19	56th Driest	Driest since: 1984	1964
Aug–Oct 1986 3-Month	-0.15	0.04	-0.19	75th Wettest	Wettest since: 1985	2011
Jul–Oct 1986 4-Month	0.28	0.01	0.27	76th Driest	Driest since: 1984	1964
Jul–Oct 1986 4-Month	0.28	0.01	0.27	55th Wettest	Wettest since: 1985	2011
Jun–Oct 1986 5-Month	0.71	0.03	0.68	95th Driest	Driest since: 1984	1964
	0.71	0.03	0.68	36th Wettest	Wettest since: 1985	2011
	Ties: 1974
May–Oct 1986 6-Month	0.30	-0.02	0.32	79th Driest	Driest since: 1983	1964
May–Oct 1986 6-Month	0.30	-0.02	0.32	52nd Wettest	Wettest since: 1985	2011
Apr–Oct 1986 7-Month	0.38	-0.02	0.40	90th Driest	Driest since: 1985	1964
	0.38	-0.02	0.40	41st Wettest	Wettest since: 1984	2011
	Ties: 1977
Mar–Oct 1986 8-Month	0.30	-0.01	0.31	85th Driest	Driest since: 1985	1964
	0.30	-0.01	0.31	46th Wettest	Wettest since: 1984	2011
	Ties: 1946
Feb–Oct 1986 9-Month	0.41	0.00	0.41	93rd Driest	Driest since: 1985	1964
Feb–Oct 1986 9-Month	0.41	0.00	0.41	38th Wettest	Wettest since: 1984	2011
Jan–Oct 1986 10-Month	0.42	0.01	0.41	95th Driest	Driest since: 1985	1991
	0.42	0.01	0.41	36th Wettest	Wettest since: 1984	2011
	Ties: 1977
Dec 1985–Oct 1986 11-Month	0.31	0.01	0.30	89th Driest	Driest since: 1985	1964, 1980
Dec 1985–Oct 1986 11-Month	0.31	0.01	0.30	41st Wettest	Wettest since: 1984	2011
Nov 1985–Oct 1986 12-Month	0.54	-0.01	0.55	97th Driest	Driest since: 1985	1965
Nov 1985–Oct 1986 12-Month	0.54	-0.01	0.55	33rd Wettest	Wettest since: 1984	2011
May 1985–Oct 1986 18-Month	0.63	-0.02	0.65	107th Driest	Driest since: 1985	1965
May 1985–Oct 1986 18-Month	0.63	-0.02	0.65	23rd Wettest	Wettest since: 1976	2019
Nov 1984–Oct 1986 24-Month	0.08	-0.02	0.10	72nd Driest	Driest since: 1983	1965
	0.08	-0.02	0.10	57th Wettest	Wettest since: 1985	2019
	Ties: 1943
Nov 1983–Oct 1986 36-Month	0.33	-0.01	0.34	97th Driest	Driest since: 1985	1965
Nov 1983–Oct 1986 36-Month	0.33	-0.01	0.34	31st Wettest	Wettest since: 1979	1975
Nov 1982–Oct 1986 48-Month	0.28	-0.01	0.29	93rd Driest	Driest since: 1985	1966
Nov 1982–Oct 1986 48-Month	0.28	-0.01	0.29	34th Wettest	Wettest since: 1979	1976
Nov 1981–Oct 1986 60-Month	0.15	-0.01	0.16	79th Driest	Driest since: 1985	1966
Nov 1981–Oct 1986 60-Month	0.15	-0.01	0.16	47th Wettest	Wettest since: 1979	1976

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 1

October 1986 Palmer Z-Index Rankings

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