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 1

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	2.40	0.04	2.36	115th Driest	Driest since: 1949	1998
December 1950 1-Month	2.40	0.04	2.36	16th Wettest	Wettest since: 1948	1973
Nov–Dec 1950 2-Month	2.75	-0.11	2.86	126th Driest	Driest since: 1949	1931
Nov–Dec 1950 2-Month	2.75	-0.11	2.86	5th Wettest	Wettest to Date	1972
Oct–Dec 1950 3-Month	1.36	-0.05	1.41	114th Driest	Driest since: 1949	1931
Oct–Dec 1950 3-Month	1.36	-0.05	1.41	17th Wettest	Wettest since: 1942	1927
Sep–Dec 1950 4-Month	0.85	-0.02	0.87	96th Driest	Driest since: 1949	1931
Sep–Dec 1950 4-Month	0.85	-0.02	0.87	35th Wettest	Wettest since: 1945	2018
Aug–Dec 1950 5-Month	0.51	-0.02	0.53	90th Driest	Driest since: 1949	1964
Aug–Dec 1950 5-Month	0.51	-0.02	0.53	41st Wettest	Wettest since: 1945	2011
Jul–Dec 1950 6-Month	0.57	-0.03	0.60	91st Driest	Driest since: 1949	1964
Jul–Dec 1950 6-Month	0.57	-0.03	0.60	40th Wettest	Wettest since: 1945	2018
Jun–Dec 1950 7-Month	0.55	-0.01	0.56	92nd Driest	Driest since: 1949	1964
Jun–Dec 1950 7-Month	0.55	-0.01	0.56	39th Wettest	Wettest since: 1945	2011
May–Dec 1950 8-Month	0.48	-0.04	0.52	91st Driest	Driest since: 1949	1964
May–Dec 1950 8-Month	0.48	-0.04	0.52	40th Wettest	Wettest since: 1947	2011
Apr–Dec 1950 9-Month	0.32	-0.04	0.36	83rd Driest	Driest since: 1949	1964
	0.32	-0.04	0.36	48th Wettest	Wettest since: 1947	2011
	Ties: 1926
Mar–Dec 1950 10-Month	0.51	-0.03	0.54	102nd Driest	Driest since: 1949	1964
Mar–Dec 1950 10-Month	0.51	-0.03	0.54	29th Wettest	Wettest since: 1947	2011
Feb–Dec 1950 11-Month	0.66	-0.02	0.68	107th Driest	Driest since: 1949	1964
Feb–Dec 1950 11-Month	0.66	-0.02	0.68	24th Wettest	Wettest since: 1945	2011
Jan–Dec 1950 12-Month	0.68	-0.01	0.69	107th Driest	Driest since: 1949	1964
Jan–Dec 1950 12-Month	0.68	-0.01	0.69	24th Wettest	Wettest since: 1945	2011
Jul 1949–Dec 1950 18-Month	0.09	-0.02	0.11	67th Driest	Driest since: 1949	1965
	0.09	-0.02	0.11	63rd Wettest	Wettest since: 1948	2011
	Ties: 1912
Jan 1949–Dec 1950 24-Month	-0.09	-0.02	-0.07	57th Driest	Driest since: 1949	1964, 1965
Jan 1949–Dec 1950 24-Month	-0.09	-0.02	-0.07	73rd Wettest	Wettest since: 1948	2019
Jan 1948–Dec 1950 36-Month	-0.02	-0.02	0.00	58th Driest	Driest since: 1949	1965
Jan 1948–Dec 1950 36-Month	-0.02	-0.02	0.00	71st Wettest	Wettest since: 1948	2019
Jan 1947–Dec 1950 48-Month	0.10	-0.01	0.11	73rd Driest	Driest since: 1949	1966
Jan 1947–Dec 1950 48-Month	0.10	-0.01	0.11	55th Wettest	Wettest since: 1948	2021
Jan 1946–Dec 1950 60-Month	0.00	-0.01	0.01	54th Driest	Driest since: 1945	1966
Jan 1946–Dec 1950 60-Month	0.00	-0.01	0.01	73rd Wettest	Wettest since: 1949	1976, 2022

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 1

December 1950 Palmer Z-Index Rankings

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