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, May 1964

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 1964 1-Month	1.55" (39.37mm)	3.93" (99.82mm)	-2.38" (-60.45mm)	1st Driest	Driest since: 1964	1964
May 1964 1-Month	1.55" (39.37mm)	3.93" (99.82mm)	-2.38" (-60.45mm)	128th Wettest	Wettest since: 1963	1989
Apr–May 1964 2-Month	7.20" (182.88mm)	7.57" (192.28mm)	-0.37" (-9.40mm)	57th Driest	Driest since: 1963	1926
Apr–May 1964 2-Month	7.20" (182.88mm)	7.57" (192.28mm)	-0.37" (-9.40mm)	72nd Wettest	Wettest since: 1961	2011
Mar–May 1964 3-Month	11.15" (283.21mm)	11.06" (280.92mm)	0.09" (2.29mm)	73rd Driest	Driest since: 1963	1926
Mar–May 1964 3-Month	11.15" (283.21mm)	11.06" (280.92mm)	0.09" (2.29mm)	56th Wettest	Wettest since: 1961	2011
Feb–May 1964 4-Month	13.67" (347.22mm)	13.66" (346.96mm)	0.01" (0.26mm)	62nd Driest	Driest since: 1963	1941
Feb–May 1964 4-Month	13.67" (347.22mm)	13.66" (346.96mm)	0.01" (0.26mm)	67th Wettest	Wettest since: 1961	2011
Jan–May 1964 5-Month	17.26" (438.40mm)	16.71" (424.43mm)	0.55" (13.97mm)	74th Driest	Driest since: 1963	1941
	17.26" (438.40mm)	16.71" (424.43mm)	0.55" (13.97mm)	55th Wettest	Wettest since: 1961	2011
	Ties: 1914
Dec 1963–May 1964 6-Month	19.37" (492.00mm)	19.81" (503.17mm)	-0.44" (-11.17mm)	56th Driest	Driest since: 1963	1941
Dec 1963–May 1964 6-Month	19.37" (492.00mm)	19.81" (503.17mm)	-0.44" (-11.17mm)	72nd Wettest	Wettest since: 1961	2011
Nov 1963–May 1964 7-Month	24.71" (627.63mm)	23.02" (584.71mm)	1.69" (42.92mm)	89th Driest	Driest since: 1963	1934
	24.71" (627.63mm)	23.02" (584.71mm)	1.69" (42.92mm)	39th Wettest	Wettest since: 1960	1952
	Ties: 2014
Oct 1963–May 1964 8-Month	24.93" (633.22mm)	26.19" (665.23mm)	-1.26" (-32.01mm)	40th Driest	Driest since: 1963	1925
Oct 1963–May 1964 8-Month	24.93" (633.22mm)	26.19" (665.23mm)	-1.26" (-32.01mm)	88th Wettest	Wettest since: 1960	2011
Sep 1963–May 1964 9-Month	27.63" (701.80mm)	29.75" (755.65mm)	-2.12" (-53.85mm)	33rd Driest	Driest since: 1963	1941
Sep 1963–May 1964 9-Month	27.63" (701.80mm)	29.75" (755.65mm)	-2.12" (-53.85mm)	95th Wettest	Wettest since: 1961	2019
Aug 1963–May 1964 10-Month	30.30" (769.62mm)	33.62" (853.95mm)	-3.32" (-84.33mm)	26th Driest	Driest since: 1963	1931
Aug 1963–May 1964 10-Month	30.30" (769.62mm)	33.62" (853.95mm)	-3.32" (-84.33mm)	102nd Wettest	Wettest since: 1961	2019
Jul 1963–May 1964 11-Month	33.64" (854.46mm)	37.82" (960.63mm)	-4.18" (-106.17mm)	21st Driest	Driest since: 1963	1931
Jul 1963–May 1964 11-Month	33.64" (854.46mm)	37.82" (960.63mm)	-4.18" (-106.17mm)	107th Wettest	Wettest since: 1962	2019
Jun 1963–May 1964 12-Month	36.58" (929.13mm)	41.97" (1,066.04mm)	-5.39" (-136.91mm)	15th Driest	Driest since: 1963	1931
Jun 1963–May 1964 12-Month	36.58" (929.13mm)	41.97" (1,066.04mm)	-5.39" (-136.91mm)	113th Wettest	Wettest since: 1962	2019
Dec 1962–May 1964 18-Month	51.79" (1,315.47mm)	61.76" (1,568.70mm)	-9.97" (-253.23mm)	2nd Driest	Driest since: 1931	1931
Dec 1962–May 1964 18-Month	51.79" (1,315.47mm)	61.76" (1,568.70mm)	-9.97" (-253.23mm)	125th Wettest	Wettest since: 1963	2019
Jun 1962–May 1964 24-Month	71.36" (1,812.54mm)	83.91" (2,131.31mm)	-12.55" (-318.77mm)	5th Driest	Driest since: 1932	1931
Jun 1962–May 1964 24-Month	71.36" (1,812.54mm)	83.91" (2,131.31mm)	-12.55" (-318.77mm)	122nd Wettest	Wettest since: 1963	2019
Jun 1961–May 1964 36-Month	109.35" (2,777.49mm)	125.93" (3,198.62mm)	-16.58" (-421.13mm)	6th Driest	Driest since: 1932	1965
Jun 1961–May 1964 36-Month	109.35" (2,777.49mm)	125.93" (3,198.62mm)	-16.58" (-421.13mm)	120th Wettest	Wettest since: 1963	2020
Jun 1960–May 1964 48-Month	149.59" (3,799.59mm)	167.92" (4,265.17mm)	-18.33" (-465.58mm)	6th Driest	Driest since: 1964	1966
Jun 1960–May 1964 48-Month	149.59" (3,799.59mm)	167.92" (4,265.17mm)	-18.33" (-465.58mm)	119th Wettest	Wettest since: 1963	2020
Jun 1959–May 1964 60-Month	194.79" (4,947.67mm)	209.84" (5,329.94mm)	-15.05" (-382.27mm)	10th Driest	Driest since: 1935	1967
Jun 1959–May 1964 60-Month	194.79" (4,947.67mm)	209.84" (5,329.94mm)	-15.05" (-382.27mm)	114th Wettest	Wettest since: 1963	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on January 29, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings