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 1947

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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
May 1947 1-Month	6.46" (164.08mm)	3.93" (99.82mm)	2.53" (64.26mm)	122nd Driest	Driest since: 1945	1964
May 1947 1-Month	6.46" (164.08mm)	3.93" (99.82mm)	2.53" (64.26mm)	7th Wettest	Wettest since: 1946	1989
Apr–May 1947 2-Month	10.36" (263.14mm)	7.57" (192.28mm)	2.79" (70.86mm)	119th Driest	Driest since: 1946	1926
Apr–May 1947 2-Month	10.36" (263.14mm)	7.57" (192.28mm)	2.79" (70.86mm)	10th Wettest	Wettest since: 1929	2011
Mar–May 1947 3-Month	12.64" (321.06mm)	11.06" (280.92mm)	1.58" (40.14mm)	98th Driest	Driest since: 1946	1926
Mar–May 1947 3-Month	12.64" (321.06mm)	11.06" (280.92mm)	1.58" (40.14mm)	31st Wettest	Wettest since: 1945	2011
Feb–May 1947 4-Month	13.99" (355.35mm)	13.66" (346.96mm)	0.33" (8.39mm)	69th Driest	Driest since: 1941	1941
	13.99" (355.35mm)	13.66" (346.96mm)	0.33" (8.39mm)	60th Wettest	Wettest since: 1946	2011
	Ties: 1954
Jan–May 1947 5-Month	17.70" (449.58mm)	16.71" (424.43mm)	0.99" (25.15mm)	83rd Driest	Driest since: 1946	1941
Jan–May 1947 5-Month	17.70" (449.58mm)	16.71" (424.43mm)	0.99" (25.15mm)	46th Wettest	Wettest since: 1945	2011
Dec 1946–May 1947 6-Month	20.04" (509.02mm)	19.81" (503.17mm)	0.23" (5.85mm)	70th Driest	Driest since: 1946	1941
Dec 1946–May 1947 6-Month	20.04" (509.02mm)	19.81" (503.17mm)	0.23" (5.85mm)	58th Wettest	Wettest since: 1945	2011
Nov 1946–May 1947 7-Month	21.40" (543.56mm)	23.02" (584.71mm)	-1.62" (-41.15mm)	44th Driest	Driest since: 1944	1934
Nov 1946–May 1947 7-Month	21.40" (543.56mm)	23.02" (584.71mm)	-1.62" (-41.15mm)	84th Wettest	Wettest since: 1946	1952
Oct 1946–May 1947 8-Month	25.06" (636.52mm)	26.19" (665.23mm)	-1.13" (-28.71mm)	43rd Driest	Driest since: 1941	1925
Oct 1946–May 1947 8-Month	25.06" (636.52mm)	26.19" (665.23mm)	-1.13" (-28.71mm)	85th Wettest	Wettest since: 1946	2011
Sep 1946–May 1947 9-Month	28.40" (721.36mm)	29.75" (755.65mm)	-1.35" (-34.29mm)	43rd Driest	Driest since: 1944	1941
Sep 1946–May 1947 9-Month	28.40" (721.36mm)	29.75" (755.65mm)	-1.35" (-34.29mm)	85th Wettest	Wettest since: 1946	2019
Aug 1946–May 1947 10-Month	32.36" (821.94mm)	33.62" (853.95mm)	-1.26" (-32.01mm)	46th Driest	Driest since: 1944	1931
Aug 1946–May 1947 10-Month	32.36" (821.94mm)	33.62" (853.95mm)	-1.26" (-32.01mm)	82nd Wettest	Wettest since: 1946	2019
Jul 1946–May 1947 11-Month	36.30" (922.02mm)	37.82" (960.63mm)	-1.52" (-38.61mm)	46th Driest	Driest since: 1944	1931
Jul 1946–May 1947 11-Month	36.30" (922.02mm)	37.82" (960.63mm)	-1.52" (-38.61mm)	82nd Wettest	Wettest since: 1946	2019
Jun 1946–May 1947 12-Month	42.36" (1,075.94mm)	41.97" (1,066.04mm)	0.39" (9.90mm)	61st Driest	Driest since: 1945	1931
Jun 1946–May 1947 12-Month	42.36" (1,075.94mm)	41.97" (1,066.04mm)	0.39" (9.90mm)	67th Wettest	Wettest since: 1946	2019
Dec 1945–May 1947 18-Month	60.45" (1,535.43mm)	61.76" (1,568.70mm)	-1.31" (-33.27mm)	49th Driest	Driest since: 1945	1931
Dec 1945–May 1947 18-Month	60.45" (1,535.43mm)	61.76" (1,568.70mm)	-1.31" (-33.27mm)	78th Wettest	Wettest since: 1946	2019
Jun 1945–May 1947 24-Month	89.00" (2,260.60mm)	83.91" (2,131.31mm)	5.09" (129.29mm)	94th Driest	Driest since: 1946	1931
	89.00" (2,260.60mm)	83.91" (2,131.31mm)	5.09" (129.29mm)	33rd Wettest	Wettest since: 1943	2019
	Ties: 1984
Jun 1944–May 1947 36-Month	131.25" (3,333.75mm)	125.93" (3,198.62mm)	5.32" (135.13mm)	86th Driest	Driest since: 1946	1965
Jun 1944–May 1947 36-Month	131.25" (3,333.75mm)	125.93" (3,198.62mm)	5.32" (135.13mm)	40th Wettest	Wettest since: 1938	2020
Jun 1943–May 1947 48-Month	169.25" (4,298.95mm)	167.92" (4,265.17mm)	1.33" (33.78mm)	62nd Driest	Driest since: 1944	1966
Jun 1943–May 1947 48-Month	169.25" (4,298.95mm)	167.92" (4,265.17mm)	1.33" (33.78mm)	63rd Wettest	Wettest since: 1946	2020
Jun 1942–May 1947 60-Month	217.68" (5,529.07mm)	209.84" (5,329.94mm)	7.84" (199.13mm)	88th Driest	Driest since: 1946	1967
Jun 1942–May 1947 60-Month	217.68" (5,529.07mm)	209.84" (5,329.94mm)	7.84" (199.13mm)	36th Wettest	Wettest since: 1916	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on June 4, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings