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

January 1946 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 1946 1-Month	-1.75	0.23	-1.98	12th Driest	Driest since: 1931	1981
January 1946 1-Month	-1.75	0.23	-1.98	120th Wettest	Wettest since: 1945	1979
Dec 1945–Jan 1946 2-Month	-0.47	0.12	-0.59	48th Driest	Driest since: 1944	2002
Dec 1945–Jan 1946 2-Month	-0.47	0.12	-0.59	83rd Wettest	Wettest since: 1945	1978
Nov 1945–Jan 1946 3-Month	0.84	0.01	0.83	103rd Driest	Driest since: 1945	2002
Nov 1945–Jan 1946 3-Month	0.84	0.01	0.83	28th Wettest	Wettest since: 1941	2019
Oct 1945–Jan 1946 4-Month	0.29	0.00	0.29	78th Driest	Driest since: 1945	2002
	0.29	0.00	0.29	53rd Wettest	Wettest since: 1945	2019
	Ties: 1912, 1945
Sep 1945–Jan 1946 5-Month	0.74	0.03	0.71	98th Driest	Driest since: 1945	1931
Sep 1945–Jan 1946 5-Month	0.74	0.03	0.71	33rd Wettest	Wettest since: 1943	2019
Aug 1945–Jan 1946 6-Month	1.02	0.06	0.96	108th Driest	Driest since: 1945	1931
Aug 1945–Jan 1946 6-Month	1.02	0.06	0.96	23rd Wettest	Wettest since: 1943	2019
Jul 1945–Jan 1946 7-Month	1.30	0.08	1.22	120th Driest	Driest since: 1945	1931
Jul 1945–Jan 1946 7-Month	1.30	0.08	1.22	11th Wettest	Wettest since: 1943	2019
Jun 1945–Jan 1946 8-Month	1.01	0.09	0.92	112th Driest	Driest since: 1945	1931
Jun 1945–Jan 1946 8-Month	1.01	0.09	0.92	19th Wettest	Wettest since: 1943	2019
May 1945–Jan 1946 9-Month	1.03	0.05	0.98	119th Driest	Driest since: 1945	1931
	1.03	0.05	0.98	12th Wettest	Wettest since: 1943	2019
	Ties: 1918
Apr 1945–Jan 1946 10-Month	1.01	0.04	0.97	116th Driest	Driest since: 1945	1931
Apr 1945–Jan 1946 10-Month	1.01	0.04	0.97	15th Wettest	Wettest since: 1943	2019
Mar 1945–Jan 1946 11-Month	0.67	0.04	0.63	107th Driest	Driest since: 1945	1931
	0.67	0.04	0.63	24th Wettest	Wettest since: 1943	2019
	Ties: 1913
Feb 1945–Jan 1946 12-Month	0.56	0.05	0.51	100th Driest	Driest since: 1945	1931
Feb 1945–Jan 1946 12-Month	0.56	0.05	0.51	31st Wettest	Wettest since: 1943	2019
Aug 1944–Jan 1946 18-Month	0.30	0.05	0.25	82nd Driest	Driest since: 1945	1932
	0.30	0.05	0.25	48th Wettest	Wettest since: 1943	2019
	Ties: 1916
Feb 1944–Jan 1946 24-Month	0.14	0.05	0.09	68th Driest	Driest since: 1945	1932
Feb 1944–Jan 1946 24-Month	0.14	0.05	0.09	62nd Wettest	Wettest since: 1944	2020
Feb 1943–Jan 1946 36-Month	-0.07	0.05	-0.12	49th Driest	Driest since: 1944	1967
	-0.07	0.05	-0.12	80th Wettest	Wettest since: 1945	2020
	Ties: 1899
Feb 1942–Jan 1946 48-Month	0.27	0.06	0.21	87th Driest	Driest since: 1945	1967
	0.27	0.06	0.21	41st Wettest	Wettest since: 1941	1997
	Ties: 1921
Feb 1941–Jan 1946 60-Month	-0.04	0.05	-0.09	45th Driest	Driest since: 1935	1967
Feb 1941–Jan 1946 60-Month	-0.04	0.05	-0.09	82nd Wettest	Wettest since: 1945	1997

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 4

January 1946 Palmer Z-Index Rankings

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