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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 2

January 1975 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 1975 1-Month	2.15	0.21	1.94	116th Driest	Driest since: 1974	1970
January 1975 1-Month	2.15	0.21	1.94	16th Wettest	Wettest since: 1953	1979
Dec 1974–Jan 1975 2-Month	1.67	0.14	1.53	112th Driest	Driest since: 1972	1981
Dec 1974–Jan 1975 2-Month	1.67	0.14	1.53	19th Wettest	Wettest since: 1974	1978
Nov 1974–Jan 1975 3-Month	0.61	0.00	0.61	101st Driest	Driest since: 1972	1981
Nov 1974–Jan 1975 3-Month	0.61	0.00	0.61	30th Wettest	Wettest since: 1974	1978
Oct 1974–Jan 1975 4-Month	0.12	0.03	0.09	67th Driest	Driest since: 1972	2025
Oct 1974–Jan 1975 4-Month	0.12	0.03	0.09	64th Wettest	Wettest since: 1974	1978
Sep 1974–Jan 1975 5-Month	0.61	0.03	0.58	96th Driest	Driest since: 1972	2025
Sep 1974–Jan 1975 5-Month	0.61	0.03	0.58	35th Wettest	Wettest since: 1974	1978
Aug 1974–Jan 1975 6-Month	0.81	0.04	0.77	106th Driest	Driest since: 1974	1931
Aug 1974–Jan 1975 6-Month	0.81	0.04	0.77	25th Wettest	Wettest since: 1956	2019
Jul 1974–Jan 1975 7-Month	0.61	0.02	0.59	99th Driest	Driest since: 1974	1931
Jul 1974–Jan 1975 7-Month	0.61	0.02	0.59	32nd Wettest	Wettest since: 1972	2019
Jun 1974–Jan 1975 8-Month	0.59	0.03	0.56	101st Driest	Driest since: 1974	1931
Jun 1974–Jan 1975 8-Month	0.59	0.03	0.56	30th Wettest	Wettest since: 1973	2019
May 1974–Jan 1975 9-Month	0.50	-0.01	0.51	97th Driest	Driest since: 1972	1981
May 1974–Jan 1975 9-Month	0.50	-0.01	0.51	34th Wettest	Wettest since: 1974	2019
Apr 1974–Jan 1975 10-Month	0.37	0.00	0.37	91st Driest	Driest since: 1972	1931
Apr 1974–Jan 1975 10-Month	0.37	0.00	0.37	40th Wettest	Wettest since: 1974	2019
Mar 1974–Jan 1975 11-Month	0.48	0.01	0.47	95th Driest	Driest since: 1972	1931
Mar 1974–Jan 1975 11-Month	0.48	0.01	0.47	36th Wettest	Wettest since: 1974	2019
Feb 1974–Jan 1975 12-Month	0.37	0.02	0.35	93rd Driest	Driest since: 1972	1931
Feb 1974–Jan 1975 12-Month	0.37	0.02	0.35	38th Wettest	Wettest since: 1974	2019
Aug 1973–Jan 1975 18-Month	0.44	0.03	0.41	98th Driest	Driest since: 1972	1966
Aug 1973–Jan 1975 18-Month	0.44	0.03	0.41	32nd Wettest	Wettest since: 1974	2019
Feb 1973–Jan 1975 24-Month	0.40	0.03	0.37	101st Driest	Driest since: 1972	1966
Feb 1973–Jan 1975 24-Month	0.40	0.03	0.37	29th Wettest	Wettest since: 1974	2020
Feb 1972–Jan 1975 36-Month	0.68	0.03	0.65	117th Driest	Driest since: 1974	1967
Feb 1972–Jan 1975 36-Month	0.68	0.03	0.65	12th Wettest	Wettest since: 1954	2021
Feb 1971–Jan 1975 48-Month	0.60	0.03	0.57	117th Driest	Driest since: 1974	1967
Feb 1971–Jan 1975 48-Month	0.60	0.03	0.57	11th Wettest	Wettest since: 1954	1976, 2022
Feb 1970–Jan 1975 60-Month	0.47	0.03	0.44	110th Driest	Driest since: 1974	1967
	0.47	0.03	0.44	17th Wettest	Wettest since: 1953	1976
	Ties: 1953

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 2

January 1975 Palmer Z-Index Rankings

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