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 5

October 1907 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1907 1-Month	1.07	0.02	1.05	90th Driest	Driest since: 1904	1963
October 1907 1-Month	1.07	0.02	1.05	41st Wettest	Wettest since: 1906	1976
Sep–Oct 1907 2-Month	2.48	0.09	2.39	119th Driest	Driest since: 1906	1930
Sep–Oct 1907 2-Month	2.48	0.09	2.39	12th Wettest	Wettest to Date	2011
Aug–Oct 1907 3-Month	1.33	0.10	1.23	103rd Driest	Driest since: 1906	1930
Aug–Oct 1907 3-Month	1.33	0.10	1.23	28th Wettest	Wettest since: 1903	2011
Jul–Oct 1907 4-Month	0.80	0.08	0.72	93rd Driest	Driest since: 1906	1930
Jul–Oct 1907 4-Month	0.80	0.08	0.72	38th Wettest	Wettest since: 1905	2018
Jun–Oct 1907 5-Month	0.93	0.10	0.83	96th Driest	Driest since: 1906	1930
Jun–Oct 1907 5-Month	0.93	0.10	0.83	35th Wettest	Wettest since: 1903	2018
May–Oct 1907 6-Month	0.64	0.04	0.60	94th Driest	Driest since: 1906	1991
May–Oct 1907 6-Month	0.64	0.04	0.60	37th Wettest	Wettest since: 1903	2018
Apr–Oct 1907 7-Month	0.42	0.07	0.35	85th Driest	Driest since: 1906	1991
Apr–Oct 1907 7-Month	0.42	0.07	0.35	46th Wettest	Wettest since: 1903	2011
Mar–Oct 1907 8-Month	0.37	0.07	0.30	83rd Driest	Driest since: 1905	1991
Mar–Oct 1907 8-Month	0.37	0.07	0.30	48th Wettest	Wettest since: 1906	2011
Feb–Oct 1907 9-Month	0.20	0.07	0.13	70th Driest	Driest since: 1905	1991
Feb–Oct 1907 9-Month	0.20	0.07	0.13	61st Wettest	Wettest since: 1906	2011
Jan–Oct 1907 10-Month	0.33	0.09	0.24	82nd Driest	Driest since: 1905	1991
Jan–Oct 1907 10-Month	0.33	0.09	0.24	49th Wettest	Wettest since: 1906	2011
Dec 1906–Oct 1907 11-Month	0.43	0.09	0.34	84th Driest	Driest since: 1905	1930
Dec 1906–Oct 1907 11-Month	0.43	0.09	0.34	46th Wettest	Wettest since: 1906	2011
Nov 1906–Oct 1907 12-Month	0.24	0.06	0.18	76th Driest	Driest since: 1905	1931
Nov 1906–Oct 1907 12-Month	0.24	0.06	0.18	54th Wettest	Wettest since: 1906	2011
May 1906–Oct 1907 18-Month	0.31	0.05	0.26	85th Driest	Driest since: 1905	1931
May 1906–Oct 1907 18-Month	0.31	0.05	0.26	45th Wettest	Wettest since: 1906	2019
Nov 1905–Oct 1907 24-Month	0.31	0.05	0.26	89th Driest	Driest since: 1906	1931
Nov 1905–Oct 1907 24-Month	0.31	0.05	0.26	40th Wettest	Wettest since: 1904	2019
Nov 1904–Oct 1907 36-Month	0.19	0.05	0.14	76th Driest	Driest since: 1902	1932
Nov 1904–Oct 1907 36-Month	0.19	0.05	0.14	52nd Wettest	Wettest since: 1906	2019
Nov 1903–Oct 1907 48-Month	0.25	0.05	0.20	84th Driest	Driest since: 1902	1966
Nov 1903–Oct 1907 48-Month	0.25	0.05	0.20	43rd Wettest	Wettest since: 1906	2006
Nov 1902–Oct 1907 60-Month	0.41	0.05	0.36	104th Driest	Driest since: 1904	1966
Nov 1902–Oct 1907 60-Month	0.41	0.05	0.36	22nd Wettest	Wettest since: 1906	1976

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on April 1, 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 5

October 1907 Palmer Z-Index Rankings

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