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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

January 1979 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
January 1979 1-Month	7.29	0.21	7.08	131st Driest	Driest since: 1978	1970
January 1979 1-Month	7.29	0.21	7.08	1st Wettest	Wettest to Date	1979
Dec 1978–Jan 1979 2-Month	3.89	0.14	3.75	129th Driest	Driest since: 1977	1981
Dec 1978–Jan 1979 2-Month	3.89	0.14	3.75	2nd Wettest	Wettest since: 1978	1978
Nov 1978–Jan 1979 3-Month	2.07	0.00	2.07	123rd Driest	Driest since: 1977	1981
Nov 1978–Jan 1979 3-Month	2.07	0.00	2.07	8th Wettest	Wettest since: 1978	1978
Oct 1978–Jan 1979 4-Month	1.54	0.03	1.51	121st Driest	Driest since: 1977	2025
Oct 1978–Jan 1979 4-Month	1.54	0.03	1.51	10th Wettest	Wettest since: 1978	1978
Sep 1978–Jan 1979 5-Month	1.16	0.03	1.13	116th Driest	Driest since: 1977	2025
Sep 1978–Jan 1979 5-Month	1.16	0.03	1.13	15th Wettest	Wettest since: 1978	1978
Aug 1978–Jan 1979 6-Month	1.40	0.04	1.36	120th Driest	Driest since: 1977	1931
Aug 1978–Jan 1979 6-Month	1.40	0.04	1.36	11th Wettest	Wettest since: 1978	2019
Jul 1978–Jan 1979 7-Month	1.13	0.02	1.11	117th Driest	Driest since: 1977	1931
	1.13	0.02	1.11	14th Wettest	Wettest since: 1978	2019
	Ties: 1903, 1946
Jun 1978–Jan 1979 8-Month	0.91	0.03	0.88	107th Driest	Driest since: 1977	1931
Jun 1978–Jan 1979 8-Month	0.91	0.03	0.88	24th Wettest	Wettest since: 1978	2019
May 1978–Jan 1979 9-Month	1.06	-0.01	1.07	114th Driest	Driest since: 1977	1981
May 1978–Jan 1979 9-Month	1.06	-0.01	1.07	17th Wettest	Wettest since: 1978	2019
Apr 1978–Jan 1979 10-Month	0.75	0.00	0.75	109th Driest	Driest since: 1977	1931
Apr 1978–Jan 1979 10-Month	0.75	0.00	0.75	22nd Wettest	Wettest since: 1978	2019
Mar 1978–Jan 1979 11-Month	0.75	0.01	0.74	111th Driest	Driest since: 1977	1931
Mar 1978–Jan 1979 11-Month	0.75	0.01	0.74	20th Wettest	Wettest since: 1978	2019
Feb 1978–Jan 1979 12-Month	0.54	0.02	0.52	102nd Driest	Driest since: 1977	1931
Feb 1978–Jan 1979 12-Month	0.54	0.02	0.52	29th Wettest	Wettest since: 1978	2019
Aug 1977–Jan 1979 18-Month	1.15	0.03	1.12	124th Driest	Driest since: 1978	1966
Aug 1977–Jan 1979 18-Month	1.15	0.03	1.12	6th Wettest	Wettest since: 1953	2019
Feb 1977–Jan 1979 24-Month	0.89	0.03	0.86	123rd Driest	Driest since: 1978	1966
Feb 1977–Jan 1979 24-Month	0.89	0.03	0.86	7th Wettest	Wettest since: 1953	2020
Feb 1976–Jan 1979 36-Month	0.60	0.03	0.57	114th Driest	Driest since: 1977	1967
Feb 1976–Jan 1979 36-Month	0.60	0.03	0.57	15th Wettest	Wettest since: 1978	2021
Feb 1975–Jan 1979 48-Month	0.77	0.03	0.74	122nd Driest	Driest since: 1978	1967
Feb 1975–Jan 1979 48-Month	0.77	0.03	0.74	6th Wettest	Wettest since: 1976	1976, 2022
Feb 1974–Jan 1979 60-Month	0.69	0.03	0.66	125th Driest	Driest since: 1978	1967
Feb 1974–Jan 1979 60-Month	0.69	0.03	0.66	2nd Wettest	Wettest since: 1976	1976

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

January 1979 Palmer Z-Index Rankings

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