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 2

December 1950 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1950 1-Month	2.20	0.09	2.11	113th Driest	Driest since: 1949	1955
December 1950 1-Month	2.20	0.09	2.11	18th Wettest	Wettest since: 1942	1996
Nov–Dec 1950 2-Month	2.65	-0.09	2.74	125th Driest	Driest since: 1949	1931
Nov–Dec 1950 2-Month	2.65	-0.09	2.74	6th Wettest	Wettest to Date	1972
Oct–Dec 1950 3-Month	1.48	-0.02	1.50	117th Driest	Driest since: 1949	1930
Oct–Dec 1950 3-Month	1.48	-0.02	1.50	14th Wettest	Wettest since: 1932	1996
Sep–Dec 1950 4-Month	1.11	0.00	1.11	111th Driest	Driest since: 1949	2024
Sep–Dec 1950 4-Month	1.11	0.00	1.11	20th Wettest	Wettest since: 1942	2018
Aug–Dec 1950 5-Month	0.68	0.02	0.66	91st Driest	Driest since: 1949	1930
Aug–Dec 1950 5-Month	0.68	0.02	0.66	40th Wettest	Wettest since: 1945	2011
Jul–Dec 1950 6-Month	0.76	0.01	0.75	100th Driest	Driest since: 1949	1930
Jul–Dec 1950 6-Month	0.76	0.01	0.75	31st Wettest	Wettest since: 1945	2018
Jun–Dec 1950 7-Month	0.55	0.02	0.53	97th Driest	Driest since: 1949	1930
Jun–Dec 1950 7-Month	0.55	0.02	0.53	34th Wettest	Wettest since: 1945	2018
May–Dec 1950 8-Month	0.50	-0.02	0.52	93rd Driest	Driest since: 1949	1964
May–Dec 1950 8-Month	0.50	-0.02	0.52	38th Wettest	Wettest since: 1947	2018
Apr–Dec 1950 9-Month	0.30	-0.01	0.31	84th Driest	Driest since: 1949	1930
Apr–Dec 1950 9-Month	0.30	-0.01	0.31	47th Wettest	Wettest since: 1948	2018
Mar–Dec 1950 10-Month	0.49	0.00	0.49	96th Driest	Driest since: 1949	1930
Mar–Dec 1950 10-Month	0.49	0.00	0.49	35th Wettest	Wettest since: 1947	2011
Feb–Dec 1950 11-Month	0.60	0.02	0.58	105th Driest	Driest since: 1949	1930
Feb–Dec 1950 11-Month	0.60	0.02	0.58	26th Wettest	Wettest since: 1945	2018
Jan–Dec 1950 12-Month	0.55	0.03	0.52	105th Driest	Driest since: 1949	1930
	0.55	0.03	0.52	26th Wettest	Wettest since: 1945	2018
	Ties: 1940
Jul 1949–Dec 1950 18-Month	0.02	0.02	0.00	59th Driest	Driest since: 1949	1965
Jul 1949–Dec 1950 18-Month	0.02	0.02	0.00	71st Wettest	Wettest since: 1948	2019
Jan 1949–Dec 1950 24-Month	-0.13	0.03	-0.16	47th Driest	Driest since: 1949	1931
Jan 1949–Dec 1950 24-Month	-0.13	0.03	-0.16	83rd Wettest	Wettest since: 1948	2019
Jan 1948–Dec 1950 36-Month	-0.03	0.03	-0.06	51st Driest	Driest since: 1949	1965
Jan 1948–Dec 1950 36-Month	-0.03	0.03	-0.06	78th Wettest	Wettest since: 1948	2020
Jan 1947–Dec 1950 48-Month	0.08	0.03	0.05	63rd Driest	Driest since: 1949	1966
	0.08	0.03	0.05	65th Wettest	Wettest since: 1948	2021
	Ties: 1912
Jan 1946–Dec 1950 60-Month	0.01	0.03	-0.02	52nd Driest	Driest since: 1947	1966
Jan 1946–Dec 1950 60-Month	0.01	0.03	-0.02	75th Wettest	Wettest since: 1949	1976, 1979, 2021

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 22, 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 2

December 1950 Palmer Z-Index Rankings

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