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 2

November 1971 Palmer Z-Index Rankings

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Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
November 1971 1-Month	2.34	-0.28	2.62	121st Driest	Driest since: 1969	1931
November 1971 1-Month	2.34	-0.28	2.62	10th Wettest	Wettest since: 1970	2018
Oct–Nov 1971 2-Month	0.96	-0.07	1.03	95th Driest	Driest since: 1969	2024
Oct–Nov 1971 2-Month	0.96	-0.07	1.03	36th Wettest	Wettest since: 1970	1932
Sep–Nov 1971 3-Month	0.82	-0.03	0.85	95th Driest	Driest since: 1970	2024
Sep–Nov 1971 3-Month	0.82	-0.03	0.85	36th Wettest	Wettest since: 1955	2011
Aug–Nov 1971 4-Month	1.45	0.00	1.45	117th Driest	Driest since: 1970	1930
Aug–Nov 1971 4-Month	1.45	0.00	1.45	14th Wettest	Wettest since: 1955	2011
Jul–Nov 1971 5-Month	1.20	-0.01	1.21	115th Driest	Driest since: 1970	1964
Jul–Nov 1971 5-Month	1.20	-0.01	1.21	16th Wettest	Wettest since: 1955	2018
Jun–Nov 1971 6-Month	0.60	0.01	0.59	94th Driest	Driest since: 1970	1930
Jun–Nov 1971 6-Month	0.60	0.01	0.59	37th Wettest	Wettest since: 1969	2018
May–Nov 1971 7-Month	0.67	-0.04	0.71	101st Driest	Driest since: 1970	1964
May–Nov 1971 7-Month	0.67	-0.04	0.71	30th Wettest	Wettest since: 1960	2018
Apr–Nov 1971 8-Month	0.29	-0.02	0.31	81st Driest	Driest since: 1970	1930
Apr–Nov 1971 8-Month	0.29	-0.02	0.31	50th Wettest	Wettest since: 1960	2018
Mar–Nov 1971 9-Month	0.23	-0.01	0.24	79th Driest	Driest since: 1970	1930
	0.23	-0.01	0.24	52nd Wettest	Wettest since: 1967	2011
	Ties: 1967
Feb–Nov 1971 10-Month	0.56	0.01	0.55	102nd Driest	Driest since: 1970	1941
Feb–Nov 1971 10-Month	0.56	0.01	0.55	29th Wettest	Wettest since: 1956	2018
Jan–Nov 1971 11-Month	0.45	0.03	0.42	97th Driest	Driest since: 1970	1930
	0.45	0.03	0.42	34th Wettest	Wettest since: 1960	2018
	Ties: 1906
Dec 1970–Nov 1971 12-Month	0.36	0.03	0.33	88th Driest	Driest since: 1970	1930
Dec 1970–Nov 1971 12-Month	0.36	0.03	0.33	42nd Wettest	Wettest since: 1960	2018
Jun 1970–Nov 1971 18-Month	0.33	0.02	0.31	85th Driest	Driest since: 1970	1965
Jun 1970–Nov 1971 18-Month	0.33	0.02	0.31	45th Wettest	Wettest since: 1960	2019
Dec 1969–Nov 1971 24-Month	0.20	0.03	0.17	80th Driest	Driest since: 1970	1931
Dec 1969–Nov 1971 24-Month	0.20	0.03	0.17	49th Wettest	Wettest since: 1953	2019
Dec 1968–Nov 1971 36-Month	0.05	0.03	0.02	60th Driest	Driest since: 1970	1965
	0.05	0.03	0.02	68th Wettest	Wettest since: 1960	2019
	Ties: 1948
Dec 1967–Nov 1971 48-Month	-0.10	0.03	-0.13	37th Driest	Driest since: 1970	1966
Dec 1967–Nov 1971 48-Month	-0.10	0.03	-0.13	90th Wettest	Wettest since: 1961	2021
Dec 1966–Nov 1971 60-Month	-0.10	0.03	-0.13	30th Driest	Driest since: 1970	1966
Dec 1966–Nov 1971 60-Month	-0.10	0.03	-0.13	96th Wettest	Wettest since: 1962	1979

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 25, 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 2

November 1971 Palmer Z-Index Rankings

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