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 6

December 1971 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1971 1-Month	0.53	-0.08	0.61	81st Driest	Driest since: 1970	1930
December 1971 1-Month	0.53	-0.08	0.61	50th Wettest	Wettest since: 1969	1901
Nov–Dec 1971 2-Month	-0.26	-0.15	-0.11	56th Driest	Driest since: 1965	1930
	-0.26	-0.15	-0.11	75th Wettest	Wettest since: 1970	1972
	Ties: 1962
Oct–Dec 1971 3-Month	-0.85	-0.09	-0.76	28th Driest	Driest since: 1965	1930
Oct–Dec 1971 3-Month	-0.85	-0.09	-0.76	103rd Wettest	Wettest since: 1970	1996
Sep–Dec 1971 4-Month	-0.70	-0.04	-0.66	29th Driest	Driest since: 1965	1964
Sep–Dec 1971 4-Month	-0.70	-0.04	-0.66	102nd Wettest	Wettest since: 1970	2011
Aug–Dec 1971 5-Month	-0.72	-0.01	-0.71	27th Driest	Driest since: 1966	1964
Aug–Dec 1971 5-Month	-0.72	-0.01	-0.71	104th Wettest	Wettest since: 1970	2018
Jul–Dec 1971 6-Month	-0.48	0.01	-0.49	34th Driest	Driest since: 1966	1964
Jul–Dec 1971 6-Month	-0.48	0.01	-0.49	97th Wettest	Wettest since: 1970	2018
Jun–Dec 1971 7-Month	-0.70	0.03	-0.73	28th Driest	Driest since: 1966	1964
Jun–Dec 1971 7-Month	-0.70	0.03	-0.73	103rd Wettest	Wettest since: 1970	2018
May–Dec 1971 8-Month	-0.67	0.01	-0.68	28th Driest	Driest since: 1966	1964
	-0.67	0.01	-0.68	103rd Wettest	Wettest since: 1970	2018
	Ties: 1954
Apr–Dec 1971 9-Month	-0.78	0.03	-0.81	20th Driest	Driest since: 1966	1964
Apr–Dec 1971 9-Month	-0.78	0.03	-0.81	111th Wettest	Wettest since: 1970	2018
Mar–Dec 1971 10-Month	-0.78	0.02	-0.80	21st Driest	Driest since: 1966	1964
	-0.78	0.02	-0.80	110th Wettest	Wettest since: 1970	2011
	Ties: 1962
Feb–Dec 1971 11-Month	-0.37	0.01	-0.38	31st Driest	Driest since: 1966	1964
Feb–Dec 1971 11-Month	-0.37	0.01	-0.38	100th Wettest	Wettest since: 1970	2011
Jan–Dec 1971 12-Month	-0.43	0.03	-0.46	29th Driest	Driest since: 1966	1991
	-0.43	0.03	-0.46	102nd Wettest	Wettest since: 1970	2011, 2018
	Ties: 1944
Jul 1970–Dec 1971 18-Month	-0.08	0.02	-0.10	43rd Driest	Driest since: 1969	1965
Jul 1970–Dec 1971 18-Month	-0.08	0.02	-0.10	87th Wettest	Wettest since: 1970	2019
Jan 1970–Dec 1971 24-Month	-0.27	0.03	-0.30	35th Driest	Driest since: 1969	1964
Jan 1970–Dec 1971 24-Month	-0.27	0.03	-0.30	95th Wettest	Wettest since: 1970	2019
Jan 1969–Dec 1971 36-Month	-0.28	0.03	-0.31	22nd Driest	Driest since: 1967	1965
	-0.28	0.03	-0.31	107th Wettest	Wettest since: 1970	2019
	Ties: 1922
Jan 1968–Dec 1971 48-Month	-0.28	0.03	-0.31	24th Driest	Driest since: 1968	1966
Jan 1968–Dec 1971 48-Month	-0.28	0.03	-0.31	104th Wettest	Wettest since: 1970	2006
Jan 1967–Dec 1971 60-Month	-0.11	0.03	-0.14	39th Driest	Driest since: 1970	1966
Jan 1967–Dec 1971 60-Month	-0.11	0.03	-0.14	88th Wettest	Wettest since: 1962	2021

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 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 6

December 1971 Palmer Z-Index Rankings

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