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 2000 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2000 1-Month	1.03	0.04	0.99	94th Driest	Driest since: 1999	1998
December 2000 1-Month	1.03	0.04	0.99	37th Wettest	Wettest since: 1996	1973
Nov–Dec 2000 2-Month	-0.17	-0.11	-0.06	65th Driest	Driest since: 1999	1931
Nov–Dec 2000 2-Month	-0.17	-0.11	-0.06	66th Wettest	Wettest since: 1997	1972
Oct–Dec 2000 3-Month	-0.55	-0.05	-0.50	38th Driest	Driest since: 1999	1931
Oct–Dec 2000 3-Month	-0.55	-0.05	-0.50	93rd Wettest	Wettest since: 1997	1927
Sep–Dec 2000 4-Month	-0.46	-0.02	-0.44	38th Driest	Driest since: 1998	1931
Sep–Dec 2000 4-Month	-0.46	-0.02	-0.44	93rd Wettest	Wettest since: 1999	2018
Aug–Dec 2000 5-Month	-0.46	-0.02	-0.44	44th Driest	Driest since: 1998	1964
Aug–Dec 2000 5-Month	-0.46	-0.02	-0.44	87th Wettest	Wettest since: 1999	2011
Jul–Dec 2000 6-Month	-0.27	-0.03	-0.24	51st Driest	Driest since: 1999	1964
Jul–Dec 2000 6-Month	-0.27	-0.03	-0.24	80th Wettest	Wettest since: 1997	2018
Jun–Dec 2000 7-Month	0.16	-0.01	0.17	69th Driest	Driest since: 1999	1964
Jun–Dec 2000 7-Month	0.16	-0.01	0.17	62nd Wettest	Wettest since: 1996	2011
May–Dec 2000 8-Month	0.16	-0.04	0.20	72nd Driest	Driest since: 1999	1964
May–Dec 2000 8-Month	0.16	-0.04	0.20	59th Wettest	Wettest since: 1996	2011
Apr–Dec 2000 9-Month	0.15	-0.04	0.19	70th Driest	Driest since: 1999	1964
Apr–Dec 2000 9-Month	0.15	-0.04	0.19	61st Wettest	Wettest since: 1996	2011
Mar–Dec 2000 10-Month	0.15	-0.03	0.18	71st Driest	Driest since: 1999	1964
	0.15	-0.03	0.18	60th Wettest	Wettest since: 1996	2011
	Ties: 1926
Feb–Dec 2000 11-Month	0.15	-0.02	0.17	75th Driest	Driest since: 1999	1964
Feb–Dec 2000 11-Month	0.15	-0.02	0.17	56th Wettest	Wettest since: 1996	2011
Jan–Dec 2000 12-Month	0.16	-0.01	0.17	77th Driest	Driest since: 1999	1964
Jan–Dec 2000 12-Month	0.16	-0.01	0.17	54th Wettest	Wettest since: 1996	2011
Jul 1999–Dec 2000 18-Month	-0.08	-0.02	-0.06	50th Driest	Driest since: 1999	1965
	-0.08	-0.02	-0.06	80th Wettest	Wettest since: 1997	2011
	Ties: 1937
Jan 1999–Dec 2000 24-Month	-0.12	-0.02	-0.10	52nd Driest	Driest since: 1999	1964, 1965
	-0.12	-0.02	-0.10	78th Wettest	Wettest since: 1997	2019
	Ties: 1913, 1924
Jan 1998–Dec 2000 36-Month	-0.14	-0.02	-0.12	36th Driest	Driest since: 1999	1965
	-0.14	-0.02	-0.12	93rd Wettest	Wettest since: 1998	2019
	Ties: 1992
Jan 1997–Dec 2000 48-Month	-0.25	-0.01	-0.24	25th Driest	Driest since: 1983	1966
Jan 1997–Dec 2000 48-Month	-0.25	-0.01	-0.24	103rd Wettest	Wettest since: 1999	2021
Jan 1996–Dec 2000 60-Month	0.14	-0.01	0.15	79th Driest	Driest since: 1999	1966
	0.14	-0.01	0.15	48th Wettest	Wettest since: 1998	1976, 2022
	Ties: 1938, 1948

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 2000 Palmer Z-Index Rankings

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