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

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	-0.88	0.21	-1.09	35th Driest	Driest since: 1993	1970
January 2001 1-Month	-0.88	0.21	-1.09	97th Wettest	Wettest since: 2000	1979
Dec 2000–Jan 2001 2-Month	0.13	0.14	-0.01	72nd Driest	Driest since: 2000	1981
Dec 2000–Jan 2001 2-Month	0.13	0.14	-0.01	59th Wettest	Wettest since: 1999	1978
Nov 2000–Jan 2001 3-Month	-0.38	0.00	-0.38	52nd Driest	Driest since: 2000	1981
	-0.38	0.00	-0.38	79th Wettest	Wettest since: 1998	1978
	Ties: 1906
Oct 2000–Jan 2001 4-Month	-0.67	0.03	-0.70	33rd Driest	Driest since: 1992	2025
Oct 2000–Jan 2001 4-Month	-0.67	0.03	-0.70	98th Wettest	Wettest since: 2000	1978
Sep 2000–Jan 2001 5-Month	-0.44	0.03	-0.47	35th Driest	Driest since: 1999	2025
	-0.44	0.03	-0.47	96th Wettest	Wettest since: 2000	1978
	Ties: 1897
Aug 2000–Jan 2001 6-Month	-0.34	0.04	-0.38	40th Driest	Driest since: 1999	1931
Aug 2000–Jan 2001 6-Month	-0.34	0.04	-0.38	91st Wettest	Wettest since: 2000	2019
Jul 2000–Jan 2001 7-Month	-0.39	0.02	-0.41	37th Driest	Driest since: 1999	1931
Jul 2000–Jan 2001 7-Month	-0.39	0.02	-0.41	94th Wettest	Wettest since: 2000	2019
Jun 2000–Jan 2001 8-Month	-0.08	0.03	-0.11	52nd Driest	Driest since: 2000	1931
Jun 2000–Jan 2001 8-Month	-0.08	0.03	-0.11	79th Wettest	Wettest since: 1998	2019
May 2000–Jan 2001 9-Month	-0.05	-0.01	-0.04	60th Driest	Driest since: 2000	1981
May 2000–Jan 2001 9-Month	-0.05	-0.01	-0.04	71st Wettest	Wettest since: 1997	2019
Apr 2000–Jan 2001 10-Month	-0.07	0.00	-0.07	50th Driest	Driest since: 2000	1931
Apr 2000–Jan 2001 10-Month	-0.07	0.00	-0.07	81st Wettest	Wettest since: 1997	2019
Mar 2000–Jan 2001 11-Month	0.06	0.01	0.05	71st Driest	Driest since: 2000	1931
	0.06	0.01	0.05	60th Wettest	Wettest since: 1997	2019
	Ties: 1925
Feb 2000–Jan 2001 12-Month	0.02	0.02	0.00	60th Driest	Driest since: 2000	1931
Feb 2000–Jan 2001 12-Month	0.02	0.02	0.00	71st Wettest	Wettest since: 1999	2019
Aug 1999–Jan 2001 18-Month	0.12	0.03	0.09	68th Driest	Driest since: 2000	1966
	0.12	0.03	0.09	62nd Wettest	Wettest since: 1999	2019
	Ties: 1917, 1951
Feb 1999–Jan 2001 24-Month	-0.34	0.03	-0.37	26th Driest	Driest since: 1993	1966
	-0.34	0.03	-0.37	104th Wettest	Wettest since: 2000	2020
	Ties: 1956
Feb 1998–Jan 2001 36-Month	-0.19	0.03	-0.22	30th Driest	Driest since: 2000	1967
Feb 1998–Jan 2001 36-Month	-0.19	0.03	-0.22	99th Wettest	Wettest since: 1999	2021
Feb 1997–Jan 2001 48-Month	-0.21	0.03	-0.24	23rd Driest	Driest since: 1992	1967
	-0.21	0.03	-0.24	105th Wettest	Wettest since: 2000	1976, 2022
	Ties: 1971
Feb 1996–Jan 2001 60-Month	0.08	0.03	0.05	67th Driest	Driest since: 2000	1967
Feb 1996–Jan 2001 60-Month	0.08	0.03	0.05	60th Wettest	Wettest since: 1999	1976

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 2

January 2001 Palmer Z-Index Rankings

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