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 3

October 1974 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
October 1974 1-Month	-0.48	0.11	-0.59	56th Driest	Driest since: 1973	2024
	-0.48	0.11	-0.59	75th Wettest	Wettest since: 1972	2005
	Ties: 1953
Sep–Oct 1974 2-Month	0.89	0.10	0.79	88th Driest	Driest since: 1973	2024
	0.89	0.10	0.79	43rd Wettest	Wettest since: 1971	2011
	Ties: 1956
Aug–Oct 1974 3-Month	0.77	0.10	0.67	88th Driest	Driest since: 1973	1930
Aug–Oct 1974 3-Month	0.77	0.10	0.67	43rd Wettest	Wettest since: 1971	2011
Jul–Oct 1974 4-Month	0.20	0.07	0.13	72nd Driest	Driest since: 1973	1930
	0.20	0.07	0.13	59th Wettest	Wettest since: 1971	2011
	Ties: 1940
Jun–Oct 1974 5-Month	0.32	0.07	0.25	81st Driest	Driest since: 1973	2024
	0.32	0.07	0.25	50th Wettest	Wettest since: 1972	2018
	Ties: 1920
May–Oct 1974 6-Month	0.28	0.00	0.28	81st Driest	Driest since: 1973	1964
May–Oct 1974 6-Month	0.28	0.00	0.28	50th Wettest	Wettest since: 1972	2018
Apr–Oct 1974 7-Month	0.19	0.01	0.18	76th Driest	Driest since: 1970	1963
	0.19	0.01	0.18	55th Wettest	Wettest since: 1973	2018
	Ties: 1897, 1905
Mar–Oct 1974 8-Month	0.30	0.01	0.29	78th Driest	Driest since: 1970	1930
Mar–Oct 1974 8-Month	0.30	0.01	0.29	53rd Wettest	Wettest since: 1973	2011
Feb–Oct 1974 9-Month	0.11	0.03	0.08	67th Driest	Driest since: 1970	1963
Feb–Oct 1974 9-Month	0.11	0.03	0.08	64th Wettest	Wettest since: 1973	2018
Jan–Oct 1974 10-Month	0.14	0.04	0.10	71st Driest	Driest since: 1970	1963
Jan–Oct 1974 10-Month	0.14	0.04	0.10	60th Wettest	Wettest since: 1973	2018
Dec 1973–Oct 1974 11-Month	0.49	0.04	0.45	94th Driest	Driest since: 1972	1963
Dec 1973–Oct 1974 11-Month	0.49	0.04	0.45	36th Wettest	Wettest since: 1973	1975
Nov 1973–Oct 1974 12-Month	0.22	0.01	0.21	80th Driest	Driest since: 1970	2002
Nov 1973–Oct 1974 12-Month	0.22	0.01	0.21	50th Wettest	Wettest since: 1973	2003
May 1973–Oct 1974 18-Month	0.18	0.01	0.17	71st Driest	Driest since: 1970	1965
May 1973–Oct 1974 18-Month	0.18	0.01	0.17	59th Wettest	Wettest since: 1973	2019
Nov 1972–Oct 1974 24-Month	0.57	0.01	0.56	109th Driest	Driest since: 1971	1966
Nov 1972–Oct 1974 24-Month	0.57	0.01	0.56	20th Wettest	Wettest since: 1973	2019
Nov 1971–Oct 1974 36-Month	0.56	0.01	0.55	112th Driest	Driest since: 1972	1965
	0.56	0.01	0.55	16th Wettest	Wettest since: 1973	1904
	Ties: 1907
Nov 1970–Oct 1974 48-Month	0.63	0.02	0.61	118th Driest	Driest since: 1973	1966
Nov 1970–Oct 1974 48-Month	0.63	0.02	0.61	9th Wettest	Wettest since: 1906	2021
Nov 1969–Oct 1974 60-Month	0.51	0.02	0.49	115th Driest	Driest since: 1973	1966
	0.51	0.02	0.49	11th Wettest	Wettest since: 1908	1906
	Ties: 1903

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 3

October 1974 Palmer Z-Index Rankings

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