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 1940

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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 1940 1-Month	4.43" (112.52mm)	3.93" (99.82mm)	0.50" (12.70mm)	84th Driest	Driest since: 1939	1964
May 1940 1-Month	4.43" (112.52mm)	3.93" (99.82mm)	0.50" (12.70mm)	45th Wettest	Wettest since: 1933	1989
Apr–May 1940 2-Month	9.70" (246.38mm)	7.57" (192.28mm)	2.13" (54.10mm)	110th Driest	Driest since: 1939	1926
Apr–May 1940 2-Month	9.70" (246.38mm)	7.57" (192.28mm)	2.13" (54.10mm)	19th Wettest	Wettest since: 1933	2011
Mar–May 1940 3-Month	14.58" (370.33mm)	11.06" (280.92mm)	3.52" (89.41mm)	120th Driest	Driest since: 1939	1926
Mar–May 1940 3-Month	14.58" (370.33mm)	11.06" (280.92mm)	3.52" (89.41mm)	9th Wettest	Wettest since: 1933	2011
Feb–May 1940 4-Month	17.89" (454.41mm)	13.66" (346.96mm)	4.23" (107.45mm)	123rd Driest	Driest since: 1939	1941
Feb–May 1940 4-Month	17.89" (454.41mm)	13.66" (346.96mm)	4.23" (107.45mm)	6th Wettest	Wettest since: 1908	2011
Jan–May 1940 5-Month	19.28" (489.71mm)	16.71" (424.43mm)	2.57" (65.28mm)	106th Driest	Driest since: 1939	1941
Jan–May 1940 5-Month	19.28" (489.71mm)	16.71" (424.43mm)	2.57" (65.28mm)	23rd Wettest	Wettest since: 1937	2011
Dec 1939–May 1940 6-Month	21.64" (549.66mm)	19.81" (503.17mm)	1.83" (46.49mm)	92nd Driest	Driest since: 1939	1941
Dec 1939–May 1940 6-Month	21.64" (549.66mm)	19.81" (503.17mm)	1.83" (46.49mm)	36th Wettest	Wettest since: 1937	2011
Nov 1939–May 1940 7-Month	22.66" (575.56mm)	23.02" (584.71mm)	-0.36" (-9.15mm)	62nd Driest	Driest since: 1939	1934
	22.66" (575.56mm)	23.02" (584.71mm)	-0.36" (-9.15mm)	66th Wettest	Wettest since: 1937	1952
	Ties: 1921
Oct 1939–May 1940 8-Month	26.59" (675.39mm)	26.19" (665.23mm)	0.40" (10.16mm)	71st Driest	Driest since: 1939	1925
Oct 1939–May 1940 8-Month	26.59" (675.39mm)	26.19" (665.23mm)	0.40" (10.16mm)	57th Wettest	Wettest since: 1937	2011
Sep 1939–May 1940 9-Month	29.89" (759.21mm)	29.75" (755.65mm)	0.14" (3.56mm)	70th Driest	Driest since: 1939	1941
Sep 1939–May 1940 9-Month	29.89" (759.21mm)	29.75" (755.65mm)	0.14" (3.56mm)	58th Wettest	Wettest since: 1937	2019
Aug 1939–May 1940 10-Month	32.59" (827.79mm)	33.62" (853.95mm)	-1.03" (-26.16mm)	49th Driest	Driest since: 1939	1931
Aug 1939–May 1940 10-Month	32.59" (827.79mm)	33.62" (853.95mm)	-1.03" (-26.16mm)	79th Wettest	Wettest since: 1938	2019
Jul 1939–May 1940 11-Month	35.93" (912.62mm)	37.82" (960.63mm)	-1.89" (-48.01mm)	36th Driest	Driest since: 1934	1931
Jul 1939–May 1940 11-Month	35.93" (912.62mm)	37.82" (960.63mm)	-1.89" (-48.01mm)	92nd Wettest	Wettest since: 1939	2019
Jun 1939–May 1940 12-Month	40.32" (1,024.13mm)	41.97" (1,066.04mm)	-1.65" (-41.91mm)	41st Driest	Driest since: 1934	1931
Jun 1939–May 1940 12-Month	40.32" (1,024.13mm)	41.97" (1,066.04mm)	-1.65" (-41.91mm)	87th Wettest	Wettest since: 1939	2019
Dec 1938–May 1940 18-Month	59.29" (1,505.97mm)	61.76" (1,568.70mm)	-2.47" (-62.73mm)	33rd Driest	Driest since: 1939	1931
Dec 1938–May 1940 18-Month	59.29" (1,505.97mm)	61.76" (1,568.70mm)	-2.47" (-62.73mm)	94th Wettest	Wettest since: 1938	2019
Jun 1938–May 1940 24-Month	81.47" (2,069.34mm)	83.91" (2,131.31mm)	-2.44" (-61.97mm)	39th Driest	Driest since: 1935	1931
Jun 1938–May 1940 24-Month	81.47" (2,069.34mm)	83.91" (2,131.31mm)	-2.44" (-61.97mm)	88th Wettest	Wettest since: 1939	2019
Jun 1937–May 1940 36-Month	124.53" (3,163.06mm)	125.93" (3,198.62mm)	-1.40" (-35.56mm)	46th Driest	Driest since: 1936	1965
	124.53" (3,163.06mm)	125.93" (3,198.62mm)	-1.40" (-35.56mm)	80th Wettest	Wettest since: 1939	2020
	Ties: 1907
Jun 1936–May 1940 48-Month	168.99" (4,292.35mm)	167.92" (4,265.17mm)	1.07" (27.18mm)	59th Driest	Driest since: 1937	1966
Jun 1936–May 1940 48-Month	168.99" (4,292.35mm)	167.92" (4,265.17mm)	1.07" (27.18mm)	66th Wettest	Wettest since: 1939	2020
Jun 1935–May 1940 60-Month	213.99" (5,435.35mm)	209.84" (5,329.94mm)	4.15" (105.41mm)	69th Driest	Driest since: 1938	1967
Jun 1935–May 1940 60-Month	213.99" (5,435.35mm)	209.84" (5,329.94mm)	4.15" (105.41mm)	55th Wettest	Wettest since: 1939	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 28, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings