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

November 2007 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
November 2007 1-Month	-1.50	-0.21	-1.29	35th Driest	Driest since: 2001	1930
November 2007 1-Month	-1.50	-0.21	-1.29	96th Wettest	Wettest since: 2006	2018
Oct–Nov 2007 2-Month	-1.06	-0.12	-0.94	36th Driest	Driest since: 2001	1930
Oct–Nov 2007 2-Month	-1.06	-0.12	-0.94	95th Wettest	Wettest since: 2006	1932
Sep–Nov 2007 3-Month	-1.65	-0.02	-1.63	18th Driest	Driest since: 2001	1930
Sep–Nov 2007 3-Month	-1.65	-0.02	-1.63	113th Wettest	Wettest since: 2006	2018
Aug–Nov 2007 4-Month	-1.00	0.03	-1.03	28th Driest	Driest since: 2001	1930
	-1.00	0.03	-1.03	103rd Wettest	Wettest since: 2006	2018
	Ties: 1978
Jul–Nov 2007 5-Month	-1.14	0.07	-1.21	21st Driest	Driest since: 2001	1930
Jul–Nov 2007 5-Month	-1.14	0.07	-1.21	110th Wettest	Wettest since: 2006	2018
Jun–Nov 2007 6-Month	-1.18	0.09	-1.27	15th Driest	Driest since: 2001	1930
	-1.18	0.09	-1.27	116th Wettest	Wettest since: 2006	2018
	Ties: 1910
May–Nov 2007 7-Month	-1.40	0.04	-1.44	9th Driest	Driest since: 2001	1930
May–Nov 2007 7-Month	-1.40	0.04	-1.44	122nd Wettest	Wettest since: 2006	2018
Apr–Nov 2007 8-Month	-1.14	0.04	-1.18	12th Driest	Driest since: 2001	1930
	-1.14	0.04	-1.18	119th Wettest	Wettest since: 2006	2018
	Ties: 1896, 1957
Mar–Nov 2007 9-Month	-0.98	0.03	-1.01	18th Driest	Driest since: 2001	1930
Mar–Nov 2007 9-Month	-0.98	0.03	-1.01	113th Wettest	Wettest since: 2006	2018
Feb–Nov 2007 10-Month	-0.89	0.04	-0.93	16th Driest	Driest since: 2001	1930
Feb–Nov 2007 10-Month	-0.89	0.04	-0.93	115th Wettest	Wettest since: 2006	2018
Jan–Nov 2007 11-Month	-0.89	0.06	-0.95	12th Driest	Driest since: 2001	1930
Jan–Nov 2007 11-Month	-0.89	0.06	-0.95	119th Wettest	Wettest since: 2006	2018
Dec 2006–Nov 2007 12-Month	-0.90	0.05	-0.95	10th Driest	Driest since: 2002	1930
	-0.90	0.05	-0.95	120th Wettest	Wettest since: 2006	2018
	Ties: 1988, 2002
Jun 2006–Nov 2007 18-Month	-0.23	0.06	-0.29	40th Driest	Driest since: 2002	1931
	-0.23	0.06	-0.29	90th Wettest	Wettest since: 2006	2019
	Ties: 1989
Dec 2005–Nov 2007 24-Month	-0.37	0.05	-0.42	30th Driest	Driest since: 2002	1931
Dec 2005–Nov 2007 24-Month	-0.37	0.05	-0.42	99th Wettest	Wettest since: 2006	2019
Dec 2004–Nov 2007 36-Month	-0.23	0.05	-0.28	30th Driest	Driest since: 2002	1966
	-0.23	0.05	-0.28	98th Wettest	Wettest since: 2006	2019
	Ties: 1989, 1990
Dec 2003–Nov 2007 48-Month	0.14	0.05	0.09	75th Driest	Driest since: 2003	1966
Dec 2003–Nov 2007 48-Month	0.14	0.05	0.09	52nd Wettest	Wettest since: 2006	1996
Dec 2002–Nov 2007 60-Month	0.43	0.06	0.37	109th Driest	Driest since: 2006	1966
Dec 2002–Nov 2007 60-Month	0.43	0.06	0.37	17th Wettest	Wettest since: 2006	1975

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on April 2, 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

November 2007 Palmer Z-Index Rankings

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