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 2001 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 2001 1-Month	-0.34	0.23	-0.57	58th Driest	Driest since: 1997	1981
January 2001 1-Month	-0.34	0.23	-0.57	74th Wettest	Wettest since: 2000	1979
Dec 2000–Jan 2001 2-Month	-0.15	0.12	-0.27	60th Driest	Driest since: 2000	2002
Dec 2000–Jan 2001 2-Month	-0.15	0.12	-0.27	71st Wettest	Wettest since: 1998	1978
Nov 2000–Jan 2001 3-Month	-0.48	0.01	-0.49	46th Driest	Driest since: 2000	2002
Nov 2000–Jan 2001 3-Month	-0.48	0.01	-0.49	85th Wettest	Wettest since: 1998	2019
Oct 2000–Jan 2001 4-Month	-0.91	0.00	-0.91	29th Driest	Driest since: 1999	2002
Oct 2000–Jan 2001 4-Month	-0.91	0.00	-0.91	102nd Wettest	Wettest since: 2000	2019
Sep 2000–Jan 2001 5-Month	-0.20	0.03	-0.23	46th Driest	Driest since: 1999	1931
Sep 2000–Jan 2001 5-Month	-0.20	0.03	-0.23	85th Wettest	Wettest since: 2000	2019
Aug 2000–Jan 2001 6-Month	-0.32	0.06	-0.38	38th Driest	Driest since: 1999	1931
	-0.32	0.06	-0.38	93rd Wettest	Wettest since: 2000	2019
	Ties: 1955
Jul 2000–Jan 2001 7-Month	-0.11	0.08	-0.19	48th Driest	Driest since: 2000	1931
Jul 2000–Jan 2001 7-Month	-0.11	0.08	-0.19	83rd Wettest	Wettest since: 1998	2019
Jun 2000–Jan 2001 8-Month	0.01	0.09	-0.08	53rd Driest	Driest since: 2000	1931
	0.01	0.09	-0.08	78th Wettest	Wettest since: 1998	2019
	Ties: 1970
May 2000–Jan 2001 9-Month	0.00	0.05	-0.05	56th Driest	Driest since: 2000	1931
	0.00	0.05	-0.05	75th Wettest	Wettest since: 1997	2019
	Ties: 1984
Apr 2000–Jan 2001 10-Month	0.05	0.04	0.01	61st Driest	Driest since: 2000	1931
Apr 2000–Jan 2001 10-Month	0.05	0.04	0.01	70th Wettest	Wettest since: 1997	2019
Mar 2000–Jan 2001 11-Month	0.10	0.04	0.06	63rd Driest	Driest since: 2000	1931
Mar 2000–Jan 2001 11-Month	0.10	0.04	0.06	68th Wettest	Wettest since: 1997	2019
Feb 2000–Jan 2001 12-Month	0.10	0.05	0.05	67th Driest	Driest since: 2000	1931
	0.10	0.05	0.05	64th Wettest	Wettest since: 1997	2019
	Ties: 1977
Aug 1999–Jan 2001 18-Month	0.16	0.05	0.11	68th Driest	Driest since: 2000	1932
Aug 1999–Jan 2001 18-Month	0.16	0.05	0.11	62nd Wettest	Wettest since: 1998	2019
Feb 1999–Jan 2001 24-Month	-0.24	0.05	-0.29	39th Driest	Driest since: 2000	1932
Feb 1999–Jan 2001 24-Month	-0.24	0.05	-0.29	91st Wettest	Wettest since: 1999	2020
Feb 1998–Jan 2001 36-Month	-0.21	0.05	-0.26	34th Driest	Driest since: 2000	1967
Feb 1998–Jan 2001 36-Month	-0.21	0.05	-0.26	95th Wettest	Wettest since: 1999	2020
Feb 1997–Jan 2001 48-Month	-0.22	0.06	-0.28	24th Driest	Driest since: 1993	1967
	-0.22	0.06	-0.28	104th Wettest	Wettest since: 2000	1997
	Ties: 1993
Feb 1996–Jan 2001 60-Month	0.18	0.05	0.13	79th Driest	Driest since: 1996	1967
Feb 1996–Jan 2001 60-Month	0.18	0.05	0.13	48th Wettest	Wettest since: 2000	1997

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 2001 Palmer Z-Index Rankings

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