Statewide Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska. 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

Precipitation Rankings, April 1978

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Record Driest

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
April 1978 1-Month	2.26" (57.40mm)	3.64" (92.46mm)	-1.38" (-35.06mm)	18th Driest	Driest since: 1971	1946
April 1978 1-Month	2.26" (57.40mm)	3.64" (92.46mm)	-1.38" (-35.06mm)	111th Wettest	Wettest since: 1977	2011
Mar–Apr 1978 2-Month	4.89" (124.21mm)	7.13" (181.10mm)	-2.24" (-56.89mm)	11th Driest	Driest since: 1971	1915
Mar–Apr 1978 2-Month	4.89" (124.21mm)	7.13" (181.10mm)	-2.24" (-56.89mm)	118th Wettest	Wettest since: 1977	2011
Feb–Apr 1978 3-Month	5.91" (150.11mm)	9.73" (247.14mm)	-3.82" (-97.03mm)	2nd Driest	Driest since: 1941	1941
Feb–Apr 1978 3-Month	5.91" (150.11mm)	9.73" (247.14mm)	-3.82" (-97.03mm)	127th Wettest	Wettest since: 1977	2011
Jan–Apr 1978 4-Month	12.42" (315.47mm)	12.78" (324.61mm)	-0.36" (-9.14mm)	64th Driest	Driest since: 1976	1941
Jan–Apr 1978 4-Month	12.42" (315.47mm)	12.78" (324.61mm)	-0.36" (-9.14mm)	65th Wettest	Wettest since: 1977	2011
Dec 1977–Apr 1978 5-Month	17.01" (432.05mm)	15.88" (403.35mm)	1.13" (28.70mm)	86th Driest	Driest since: 1977	1941
	17.01" (432.05mm)	15.88" (403.35mm)	1.13" (28.70mm)	42nd Wettest	Wettest since: 1975	2011
	Ties: 1912
Nov 1977–Apr 1978 6-Month	21.46" (545.08mm)	19.09" (484.89mm)	2.37" (60.19mm)	101st Driest	Driest since: 1977	1931
Nov 1977–Apr 1978 6-Month	21.46" (545.08mm)	19.09" (484.89mm)	2.37" (60.19mm)	27th Wettest	Wettest since: 1973	1952
Oct 1977–Apr 1978 7-Month	25.58" (649.73mm)	22.26" (565.40mm)	3.32" (84.33mm)	105th Driest	Driest since: 1977	1925
Oct 1977–Apr 1978 7-Month	25.58" (649.73mm)	22.26" (565.40mm)	3.32" (84.33mm)	23rd Wettest	Wettest since: 1973	2011
Sep 1977–Apr 1978 8-Month	30.86" (783.84mm)	25.83" (656.08mm)	5.03" (127.76mm)	112th Driest	Driest since: 1977	1931
Sep 1977–Apr 1978 8-Month	30.86" (783.84mm)	25.83" (656.08mm)	5.03" (127.76mm)	16th Wettest	Wettest since: 1952	2019
Aug 1977–Apr 1978 9-Month	35.18" (893.57mm)	29.69" (754.13mm)	5.49" (139.44mm)	111th Driest	Driest since: 1977	1931
Aug 1977–Apr 1978 9-Month	35.18" (893.57mm)	29.69" (754.13mm)	5.49" (139.44mm)	17th Wettest	Wettest since: 1956	2019
Jul 1977–Apr 1978 10-Month	40.75" (1,035.05mm)	33.89" (860.81mm)	6.86" (174.24mm)	119th Driest	Driest since: 1977	1931
Jul 1977–Apr 1978 10-Month	40.75" (1,035.05mm)	33.89" (860.81mm)	6.86" (174.24mm)	9th Wettest	Wettest since: 1951	2019
Jun 1977–Apr 1978 11-Month	44.84" (1,138.94mm)	38.05" (966.47mm)	6.79" (172.47mm)	117th Driest	Driest since: 1977	1931
Jun 1977–Apr 1978 11-Month	44.84" (1,138.94mm)	38.05" (966.47mm)	6.79" (172.47mm)	11th Wettest	Wettest since: 1973	2019
May 1977–Apr 1978 12-Month	46.53" (1,181.86mm)	41.95" (1,065.53mm)	4.58" (116.33mm)	105th Driest	Driest since: 1977	1931
May 1977–Apr 1978 12-Month	46.53" (1,181.86mm)	41.95" (1,065.53mm)	4.58" (116.33mm)	23rd Wettest	Wettest since: 1976	2019
Nov 1976–Apr 1978 18-Month	62.07" (1,576.58mm)	61.03" (1,550.16mm)	1.04" (26.42mm)	71st Driest	Driest since: 1977	1931
Nov 1976–Apr 1978 18-Month	62.07" (1,576.58mm)	61.03" (1,550.16mm)	1.04" (26.42mm)	56th Wettest	Wettest since: 1976	2019
May 1976–Apr 1978 24-Month	89.13" (2,263.90mm)	83.91" (2,131.31mm)	5.22" (132.59mm)	95th Driest	Driest since: 1972	1966
May 1976–Apr 1978 24-Month	89.13" (2,263.90mm)	83.91" (2,131.31mm)	5.22" (132.59mm)	32nd Wettest	Wettest since: 1977	2020
May 1975–Apr 1978 36-Month	137.26" (3,486.40mm)	125.93" (3,198.62mm)	11.33" (287.78mm)	107th Driest	Driest since: 1977	1967
May 1975–Apr 1978 36-Month	137.26" (3,486.40mm)	125.93" (3,198.62mm)	11.33" (287.78mm)	19th Wettest	Wettest since: 1976	2020
May 1974–Apr 1978 48-Month	181.43" (4,608.32mm)	167.93" (4,265.42mm)	13.50" (342.90mm)	108th Driest	Driest since: 1977	1966
May 1974–Apr 1978 48-Month	181.43" (4,608.32mm)	167.93" (4,265.42mm)	13.50" (342.90mm)	17th Wettest	Wettest since: 1976	2020
May 1973–Apr 1978 60-Month	226.71" (5,758.43mm)	209.83" (5,329.68mm)	16.88" (428.75mm)	102nd Driest	Driest since: 1974	1967
May 1973–Apr 1978 60-Month	226.71" (5,758.43mm)	209.83" (5,329.68mm)	16.88" (428.75mm)	22nd Wettest	Wettest since: 1977	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings