Climate at a Glance | Divisional Rankings | National Centers for Environmental Information (NCEI)

Divisional Rankings

Parameter:

Year:

Month:

State:

Division:

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 1990 Palmer Z-Index Rankings

View Period (Months):

All

Download:

CSV JSON XML

Record Driest

Bottom ⅒

Bottom ⅓

Normal

Top ⅓

Top ⅒

Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1990 1-Month	3.29	0.04	3.25	123rd Driest	Driest since: 1989	1998
December 1990 1-Month	3.29	0.04	3.25	8th Wettest	Wettest since: 1983	1973
Nov–Dec 1990 2-Month	1.63	-0.11	1.74	115th Driest	Driest since: 1989	1931
Nov–Dec 1990 2-Month	1.63	-0.11	1.74	16th Wettest	Wettest since: 1983	1972
Oct–Dec 1990 3-Month	1.71	-0.05	1.76	118th Driest	Driest since: 1989	1931
	1.71	-0.05	1.76	13th Wettest	Wettest since: 1983	1927
	Ties: 1932
Sep–Dec 1990 4-Month	1.06	-0.02	1.08	110th Driest	Driest since: 1989	1931
Sep–Dec 1990 4-Month	1.06	-0.02	1.08	21st Wettest	Wettest since: 1985	2018
Aug–Dec 1990 5-Month	1.47	-0.02	1.49	116th Driest	Driest since: 1989	1964
Aug–Dec 1990 5-Month	1.47	-0.02	1.49	15th Wettest	Wettest since: 1977	2011
Jul–Dec 1990 6-Month	1.28	-0.03	1.31	117th Driest	Driest since: 1989	1964
Jul–Dec 1990 6-Month	1.28	-0.03	1.31	14th Wettest	Wettest since: 1977	2018
Jun–Dec 1990 7-Month	0.98	-0.01	0.99	109th Driest	Driest since: 1989	1964
	0.98	-0.01	0.99	22nd Wettest	Wettest since: 1985	2011
	Ties: 1985
May–Dec 1990 8-Month	1.28	-0.04	1.32	118th Driest	Driest since: 1989	1964
May–Dec 1990 8-Month	1.28	-0.04	1.32	13th Wettest	Wettest since: 1972	2011
Apr–Dec 1990 9-Month	0.98	-0.04	1.02	116th Driest	Driest since: 1989	1964
Apr–Dec 1990 9-Month	0.98	-0.04	1.02	15th Wettest	Wettest since: 1973	2011
Mar–Dec 1990 10-Month	0.68	-0.03	0.71	108th Driest	Driest since: 1989	1964
Mar–Dec 1990 10-Month	0.68	-0.03	0.71	23rd Wettest	Wettest since: 1983	2011
Feb–Dec 1990 11-Month	0.63	-0.02	0.65	106th Driest	Driest since: 1989	1964
Feb–Dec 1990 11-Month	0.63	-0.02	0.65	25th Wettest	Wettest since: 1983	2011
Jan–Dec 1990 12-Month	0.74	-0.01	0.75	114th Driest	Driest since: 1989	1964
Jan–Dec 1990 12-Month	0.74	-0.01	0.75	17th Wettest	Wettest since: 1983	2011
Jul 1989–Dec 1990 18-Month	0.44	-0.02	0.46	99th Driest	Driest since: 1989	1965
	0.44	-0.02	0.46	31st Wettest	Wettest since: 1986	2011
	Ties: 1933
Jan 1989–Dec 1990 24-Month	0.46	-0.02	0.48	103rd Driest	Driest since: 1989	1964, 1965
Jan 1989–Dec 1990 24-Month	0.46	-0.02	0.48	27th Wettest	Wettest since: 1984	2019
Jan 1988–Dec 1990 36-Month	0.15	-0.02	0.17	76th Driest	Driest since: 1989	1965
	0.15	-0.02	0.17	53rd Wettest	Wettest since: 1987	2019
	Ties: 1987
Jan 1987–Dec 1990 48-Month	0.10	-0.01	0.11	73rd Driest	Driest since: 1989	1966
	0.10	-0.01	0.11	55th Wettest	Wettest since: 1987	2021
	Ties: 1920, 1950
Jan 1986–Dec 1990 60-Month	0.19	-0.01	0.20	82nd Driest	Driest since: 1989	1966
Jan 1986–Dec 1990 60-Month	0.19	-0.01	0.20	45th Wettest	Wettest since: 1987	1976, 2022

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 1990 Palmer Z-Index Rankings

Citing This Page

Success

Error