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 1898 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1898 1-Month	-0.21	0.04	-0.25	59th Driest	Driest since: 1896	1998
December 1898 1-Month	-0.21	0.04	-0.25	72nd Wettest	Wettest since: 1897	1973
Nov–Dec 1898 2-Month	0.87	-0.11	0.98	101st Driest	Driest since: 1896	1931
Nov–Dec 1898 2-Month	0.87	-0.11	0.98	30th Wettest	Wettest since: 1897	1972
Oct–Dec 1898 3-Month	1.17	-0.05	1.22	109th Driest	Driest since: 1897	1931
Oct–Dec 1898 3-Month	1.17	-0.05	1.22	22nd Wettest	Wettest to Date	1927
Sep–Dec 1898 4-Month	0.59	-0.02	0.61	86th Driest	Driest since: 1897	1931
Sep–Dec 1898 4-Month	0.59	-0.02	0.61	45th Wettest	Wettest to Date	2018
Aug–Dec 1898 5-Month	0.84	-0.02	0.86	104th Driest	Driest since: 1897	1964
Aug–Dec 1898 5-Month	0.84	-0.02	0.86	27th Wettest	Wettest to Date	2011
Jul–Dec 1898 6-Month	0.63	-0.03	0.66	96th Driest	Driest since: 1897	1964
Jul–Dec 1898 6-Month	0.63	-0.03	0.66	35th Wettest	Wettest to Date	2018
Jun–Dec 1898 7-Month	0.38	-0.01	0.39	83rd Driest	Driest since: 1897	1964
Jun–Dec 1898 7-Month	0.38	-0.01	0.39	48th Wettest	Wettest to Date	2011
May–Dec 1898 8-Month	0.62	-0.04	0.66	101st Driest	Driest since: 1897	1964
May–Dec 1898 8-Month	0.62	-0.04	0.66	30th Wettest	Wettest to Date	2011
Apr–Dec 1898 9-Month	0.53	-0.04	0.57	99th Driest	Driest since: 1897	1964
Apr–Dec 1898 9-Month	0.53	-0.04	0.57	32nd Wettest	Wettest to Date	2011
Mar–Dec 1898 10-Month	0.46	-0.03	0.49	96th Driest	Driest since: 1897	1964
Mar–Dec 1898 10-Month	0.46	-0.03	0.49	35th Wettest	Wettest to Date	2011
Feb–Dec 1898 11-Month	0.34	-0.02	0.36	87th Driest	Driest since: 1896	1964
Feb–Dec 1898 11-Month	0.34	-0.02	0.36	44th Wettest	Wettest since: 1897	2011
Jan–Dec 1898 12-Month	0.42	-0.01	0.43	96th Driest	Driest since: 1897	1964
Jan–Dec 1898 12-Month	0.42	-0.01	0.43	35th Wettest	Wettest to Date	2011
Jul 1897–Dec 1898 18-Month	0.40	-0.02	0.42	93rd Driest	Driest since: 1897	1965
Jul 1897–Dec 1898 18-Month	0.40	-0.02	0.42	37th Wettest	Wettest to Date	2011
Jan 1897–Dec 1898 24-Month	0.35	-0.02	0.37	94th Driest	Driest since: 1897	1964, 1965
Jan 1897–Dec 1898 24-Month	0.35	-0.02	0.37	36th Wettest	Wettest to Date	2019
Jan 1896–Dec 1898 36-Month	0.23	-0.02	0.25	87th Driest	Driest since: 1897	1965
Jan 1896–Dec 1898 36-Month	0.23	-0.02	0.25	42nd Wettest	Wettest to Date	2019
Jan 1895–Dec 1898 48-Month	0.03	-0.01	0.04	60th Driest	Driest to Date	1966
Jan 1895–Dec 1898 48-Month	0.03	-0.01	0.04	68th Wettest	Wettest to Date	2021

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 1898 Palmer Z-Index Rankings

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