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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 4

November 1978 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
November 1978 1-Month	-1.71	-0.21	-1.50	30th Driest	Driest since: 1974	1930
November 1978 1-Month	-1.71	-0.21	-1.50	101st Wettest	Wettest since: 1977	2018
Oct–Nov 1978 2-Month	-1.55	-0.12	-1.43	26th Driest	Driest since: 1974	1930
Oct–Nov 1978 2-Month	-1.55	-0.12	-1.43	105th Wettest	Wettest since: 1977	1932
Sep–Nov 1978 3-Month	-1.61	-0.02	-1.59	19th Driest	Driest since: 1964	1930
Sep–Nov 1978 3-Month	-1.61	-0.02	-1.59	112th Wettest	Wettest since: 1977	2018
Aug–Nov 1978 4-Month	-1.00	0.03	-1.03	28th Driest	Driest since: 1964	1930
Aug–Nov 1978 4-Month	-1.00	0.03	-1.03	103rd Wettest	Wettest since: 1977	2018
Jul–Nov 1978 5-Month	-0.53	0.07	-0.60	39th Driest	Driest since: 1974	1930
Jul–Nov 1978 5-Month	-0.53	0.07	-0.60	92nd Wettest	Wettest since: 1977	2018
Jun–Nov 1978 6-Month	-0.49	0.09	-0.58	42nd Driest	Driest since: 1968	1930
Jun–Nov 1978 6-Month	-0.49	0.09	-0.58	89th Wettest	Wettest since: 1977	2018
May–Nov 1978 7-Month	-0.17	0.04	-0.21	54th Driest	Driest since: 1977	1930
	-0.17	0.04	-0.21	77th Wettest	Wettest since: 1976	2018
	Ties: 1935
Apr–Nov 1978 8-Month	-0.40	0.04	-0.44	42nd Driest	Driest since: 1977	1930
Apr–Nov 1978 8-Month	-0.40	0.04	-0.44	89th Wettest	Wettest since: 1976	2018
Mar–Nov 1978 9-Month	-0.32	0.03	-0.35	49th Driest	Driest since: 1977	1930
Mar–Nov 1978 9-Month	-0.32	0.03	-0.35	82nd Wettest	Wettest since: 1976	2018
Feb–Nov 1978 10-Month	-0.48	0.04	-0.52	37th Driest	Driest since: 1977	1930
	-0.48	0.04	-0.52	94th Wettest	Wettest since: 1976	2018
	Ties: 1943, 1944
Jan–Nov 1978 11-Month	0.05	0.06	-0.01	67th Driest	Driest since: 1977	1930
Jan–Nov 1978 11-Month	0.05	0.06	-0.01	64th Wettest	Wettest since: 1976	2018
Dec 1977–Nov 1978 12-Month	0.25	0.05	0.20	83rd Driest	Driest since: 1977	1930
Dec 1977–Nov 1978 12-Month	0.25	0.05	0.20	47th Wettest	Wettest since: 1976	2018
Jun 1977–Nov 1978 18-Month	0.04	0.06	-0.02	63rd Driest	Driest since: 1977	1931
Jun 1977–Nov 1978 18-Month	0.04	0.06	-0.02	67th Wettest	Wettest since: 1976	2019
Dec 1976–Nov 1978 24-Month	-0.20	0.05	-0.25	42nd Driest	Driest since: 1969	1931
	-0.20	0.05	-0.25	87th Wettest	Wettest since: 1977	2019
	Ties: 1960
Dec 1975–Nov 1978 36-Month	0.02	0.05	-0.03	57th Driest	Driest since: 1970	1966
	0.02	0.05	-0.03	71st Wettest	Wettest since: 1977	2019
	Ties: 1909, 1933
Dec 1974–Nov 1978 48-Month	0.40	0.05	0.35	104th Driest	Driest since: 1977	1966
	0.40	0.05	0.35	23rd Wettest	Wettest since: 1976	1996
	Ties: 1940
Dec 1973–Nov 1978 60-Month	0.31	0.06	0.25	95th Driest	Driest since: 1972	1966
	0.31	0.06	0.25	31st Wettest	Wettest since: 1977	1975
	Ties: 1916, 1940, 1952

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 1978 Palmer Z-Index Rankings

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