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 6

December 2013 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2013 1-Month	0.83	-0.08	0.91	93rd Driest	Driest since: 2011	1930
December 2013 1-Month	0.83	-0.08	0.91	38th Wettest	Wettest since: 2012	1901
Nov–Dec 2013 2-Month	1.03	-0.15	1.18	101st Driest	Driest since: 2012	1930
	1.03	-0.15	1.18	30th Wettest	Wettest since: 2007	1972
	Ties: 2002
Oct–Dec 2013 3-Month	0.34	-0.09	0.43	75th Driest	Driest since: 2009	1930
Oct–Dec 2013 3-Month	0.34	-0.09	0.43	56th Wettest	Wettest since: 2012	1996
Sep–Dec 2013 4-Month	0.28	-0.04	0.32	70th Driest	Driest since: 2009	1964
Sep–Dec 2013 4-Month	0.28	-0.04	0.32	61st Wettest	Wettest since: 2012	2011
Aug–Dec 2013 5-Month	0.19	-0.01	0.20	68th Driest	Driest since: 2001	1964
Aug–Dec 2013 5-Month	0.19	-0.01	0.20	63rd Wettest	Wettest since: 2012	2018
Jul–Dec 2013 6-Month	0.41	0.01	0.40	76th Driest	Driest since: 2002	1964
	0.41	0.01	0.40	55th Wettest	Wettest since: 2012	2018
	Ties: 1905
Jun–Dec 2013 7-Month	0.57	0.03	0.54	87th Driest	Driest since: 2010	1964
	0.57	0.03	0.54	44th Wettest	Wettest since: 2012	2018
	Ties: 1935
May–Dec 2013 8-Month	0.41	0.01	0.40	82nd Driest	Driest since: 2010	1964
	0.41	0.01	0.40	49th Wettest	Wettest since: 2012	2018
	Ties: 1958
Apr–Dec 2013 9-Month	0.33	0.03	0.30	75th Driest	Driest since: 2010	1964
Apr–Dec 2013 9-Month	0.33	0.03	0.30	56th Wettest	Wettest since: 2012	2018
Mar–Dec 2013 10-Month	0.09	0.02	0.07	61st Driest	Driest since: 2010	1964
	0.09	0.02	0.07	70th Wettest	Wettest since: 2012	2011
	Ties: 1943
Feb–Dec 2013 11-Month	0.01	0.01	0.00	60th Driest	Driest since: 2010	1964
Feb–Dec 2013 11-Month	0.01	0.01	0.00	71st Wettest	Wettest since: 2012	2011
Jan–Dec 2013 12-Month	0.04	0.03	0.01	59th Driest	Driest since: 2010	1991
Jan–Dec 2013 12-Month	0.04	0.03	0.01	72nd Wettest	Wettest since: 2012	2011, 2018
Jul 2012–Dec 2013 18-Month	0.37	0.02	0.35	85th Driest	Driest since: 2010	1965
	0.37	0.02	0.35	45th Wettest	Wettest since: 2012	2019
	Ties: 1979
Jan 2012–Dec 2013 24-Month	0.07	0.03	0.04	59th Driest	Driest since: 2010	1964
	0.07	0.03	0.04	71st Wettest	Wettest since: 2012	2019
	Ties: 1958, 2010
Jan 2011–Dec 2013 36-Month	0.90	0.03	0.87	123rd Driest	Driest since: 2012	1965
	0.90	0.03	0.87	6th Wettest	Wettest since: 2011	2019
	Ties: 2011
Jan 2010–Dec 2013 48-Month	0.66	0.03	0.63	112th Driest	Driest since: 2010	1966
Jan 2010–Dec 2013 48-Month	0.66	0.03	0.63	16th Wettest	Wettest since: 2012	2006
Jan 2009–Dec 2013 60-Month	0.57	0.03	0.54	108th Driest	Driest since: 2010	1966
	0.57	0.03	0.54	19th Wettest	Wettest since: 2012	2021
	Ties: 2009

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 6

December 2013 Palmer Z-Index Rankings

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