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 4

January 1973 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 1973 1-Month	0.44	0.23	0.21	79th Driest	Driest since: 1972	1981
January 1973 1-Month	0.44	0.23	0.21	53rd Wettest	Wettest since: 1971	1979
Dec 1972–Jan 1973 2-Month	1.96	0.12	1.84	119th Driest	Driest since: 1972	2002
Dec 1972–Jan 1973 2-Month	1.96	0.12	1.84	12th Wettest	Wettest since: 1958	1978
Nov 1972–Jan 1973 3-Month	2.30	0.01	2.29	128th Driest	Driest since: 1972	2002
Nov 1972–Jan 1973 3-Month	2.30	0.01	2.29	3rd Wettest	Wettest to Date	2019
Oct 1972–Jan 1973 4-Month	1.44	0.00	1.44	121st Driest	Driest since: 1972	2002
Oct 1972–Jan 1973 4-Month	1.44	0.00	1.44	10th Wettest	Wettest since: 1949	2019
Sep 1972–Jan 1973 5-Month	0.71	0.03	0.68	96th Driest	Driest since: 1972	1931
Sep 1972–Jan 1973 5-Month	0.71	0.03	0.68	35th Wettest	Wettest since: 1953	2019
Aug 1972–Jan 1973 6-Month	0.35	0.06	0.29	77th Driest	Driest since: 1970	1931
Aug 1972–Jan 1973 6-Month	0.35	0.06	0.29	54th Wettest	Wettest since: 1972	2019
Jul 1972–Jan 1973 7-Month	0.19	0.08	0.11	67th Driest	Driest since: 1970	1931
	0.19	0.08	0.11	64th Wettest	Wettest since: 1972	2019
	Ties: 1937
Jun 1972–Jan 1973 8-Month	1.50	0.09	1.41	124th Driest	Driest since: 1972	1931
Jun 1972–Jan 1973 8-Month	1.50	0.09	1.41	7th Wettest	Wettest since: 1943	2019
May 1972–Jan 1973 9-Month	1.47	0.05	1.42	124th Driest	Driest since: 1972	1931
May 1972–Jan 1973 9-Month	1.47	0.05	1.42	7th Wettest	Wettest since: 1943	2019
Apr 1972–Jan 1973 10-Month	1.47	0.04	1.43	125th Driest	Driest since: 1972	1931
Apr 1972–Jan 1973 10-Month	1.47	0.04	1.43	6th Wettest	Wettest to Date	2019
Mar 1972–Jan 1973 11-Month	1.24	0.04	1.20	123rd Driest	Driest since: 1972	1931
Mar 1972–Jan 1973 11-Month	1.24	0.04	1.20	8th Wettest	Wettest since: 1943	2019
Feb 1972–Jan 1973 12-Month	1.38	0.05	1.33	125th Driest	Driest since: 1972	1931
Feb 1972–Jan 1973 12-Month	1.38	0.05	1.33	6th Wettest	Wettest to Date	2019
Aug 1971–Jan 1973 18-Month	1.11	0.05	1.06	124th Driest	Driest since: 1972	1932
Aug 1971–Jan 1973 18-Month	1.11	0.05	1.06	6th Wettest	Wettest to Date	2019
Feb 1971–Jan 1973 24-Month	0.81	0.05	0.76	121st Driest	Driest since: 1972	1932
Feb 1971–Jan 1973 24-Month	0.81	0.05	0.76	9th Wettest	Wettest since: 1929	2020
Feb 1970–Jan 1973 36-Month	0.84	0.05	0.79	124th Driest	Driest since: 1972	1967
Feb 1970–Jan 1973 36-Month	0.84	0.05	0.79	5th Wettest	Wettest to Date	2020
Feb 1969–Jan 1973 48-Month	0.49	0.06	0.43	112th Driest	Driest since: 1972	1967
Feb 1969–Jan 1973 48-Month	0.49	0.06	0.43	16th Wettest	Wettest since: 1930	1997
Feb 1968–Jan 1973 60-Month	0.26	0.05	0.21	90th Driest	Driest since: 1972	1967
	0.26	0.05	0.21	37th Wettest	Wettest since: 1953	1997
	Ties: 1941

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

January 1973 Palmer Z-Index Rankings

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