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 1939

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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 1939 1-Month	1.60" (40.64mm)	3.93" (99.82mm)	-2.33" (-59.18mm)	3rd Driest	Driest since: 1926	1964
May 1939 1-Month	1.60" (40.64mm)	3.93" (99.82mm)	-2.33" (-59.18mm)	126th Wettest	Wettest since: 1938	1989
Apr–May 1939 2-Month	5.11" (129.79mm)	7.57" (192.28mm)	-2.46" (-62.49mm)	7th Driest	Driest since: 1926	1926
Apr–May 1939 2-Month	5.11" (129.79mm)	7.57" (192.28mm)	-2.46" (-62.49mm)	122nd Wettest	Wettest since: 1938	2011
Mar–May 1939 3-Month	8.82" (224.03mm)	11.06" (280.92mm)	-2.24" (-56.89mm)	20th Driest	Driest since: 1935	1926
Mar–May 1939 3-Month	8.82" (224.03mm)	11.06" (280.92mm)	-2.24" (-56.89mm)	109th Wettest	Wettest since: 1938	2011
Feb–May 1939 4-Month	13.22" (335.79mm)	13.66" (346.96mm)	-0.44" (-11.17mm)	59th Driest	Driest since: 1938	1941
Feb–May 1939 4-Month	13.22" (335.79mm)	13.66" (346.96mm)	-0.44" (-11.17mm)	70th Wettest	Wettest since: 1937	2011
Jan–May 1939 5-Month	16.39" (416.31mm)	16.71" (424.43mm)	-0.32" (-8.12mm)	61st Driest	Driest since: 1938	1941
	16.39" (416.31mm)	16.71" (424.43mm)	-0.32" (-8.12mm)	68th Wettest	Wettest since: 1937	2011
	Ties: 1907
Dec 1938–May 1939 6-Month	18.97" (481.84mm)	19.81" (503.17mm)	-0.84" (-21.33mm)	52nd Driest	Driest since: 1938	1941
Dec 1938–May 1939 6-Month	18.97" (481.84mm)	19.81" (503.17mm)	-0.84" (-21.33mm)	76th Wettest	Wettest since: 1937	2011
Nov 1938–May 1939 7-Month	22.15" (562.61mm)	23.02" (584.71mm)	-0.87" (-22.10mm)	54th Driest	Driest since: 1938	1934
Nov 1938–May 1939 7-Month	22.15" (562.61mm)	23.02" (584.71mm)	-0.87" (-22.10mm)	74th Wettest	Wettest since: 1937	1952
Oct 1938–May 1939 8-Month	23.89" (606.81mm)	26.19" (665.23mm)	-2.30" (-58.42mm)	31st Driest	Driest since: 1935	1925
Oct 1938–May 1939 8-Month	23.89" (606.81mm)	26.19" (665.23mm)	-2.30" (-58.42mm)	97th Wettest	Wettest since: 1938	2011
Sep 1938–May 1939 9-Month	28.75" (730.25mm)	29.75" (755.65mm)	-1.00" (-25.40mm)	51st Driest	Driest since: 1938	1941
Sep 1938–May 1939 9-Month	28.75" (730.25mm)	29.75" (755.65mm)	-1.00" (-25.40mm)	77th Wettest	Wettest since: 1937	2019
Aug 1938–May 1939 10-Month	31.55" (801.37mm)	33.62" (853.95mm)	-2.07" (-52.58mm)	36th Driest	Driest since: 1934	1931
Aug 1938–May 1939 10-Month	31.55" (801.37mm)	33.62" (853.95mm)	-2.07" (-52.58mm)	92nd Wettest	Wettest since: 1938	2019
Jul 1938–May 1939 11-Month	36.19" (919.23mm)	37.82" (960.63mm)	-1.63" (-41.40mm)	43rd Driest	Driest since: 1934	1931
Jul 1938–May 1939 11-Month	36.19" (919.23mm)	37.82" (960.63mm)	-1.63" (-41.40mm)	85th Wettest	Wettest since: 1938	2019
Jun 1938–May 1939 12-Month	41.15" (1,045.21mm)	41.97" (1,066.04mm)	-0.82" (-20.83mm)	50th Driest	Driest since: 1935	1931
Jun 1938–May 1939 12-Month	41.15" (1,045.21mm)	41.97" (1,066.04mm)	-0.82" (-20.83mm)	78th Wettest	Wettest since: 1938	2019
Dec 1937–May 1939 18-Month	59.12" (1,501.65mm)	61.76" (1,568.70mm)	-2.64" (-67.05mm)	31st Driest	Driest since: 1935	1931
Dec 1937–May 1939 18-Month	59.12" (1,501.65mm)	61.76" (1,568.70mm)	-2.64" (-67.05mm)	96th Wettest	Wettest since: 1938	2019
Jun 1937–May 1939 24-Month	84.21" (2,138.93mm)	83.91" (2,131.31mm)	0.30" (7.62mm)	57th Driest	Driest since: 1935	1931
Jun 1937–May 1939 24-Month	84.21" (2,138.93mm)	83.91" (2,131.31mm)	0.30" (7.62mm)	70th Wettest	Wettest since: 1938	2019
Jun 1936–May 1939 36-Month	128.67" (3,268.22mm)	125.93" (3,198.62mm)	2.74" (69.60mm)	68th Driest	Driest since: 1936	1965
Jun 1936–May 1939 36-Month	128.67" (3,268.22mm)	125.93" (3,198.62mm)	2.74" (69.60mm)	58th Wettest	Wettest since: 1938	2020
Jun 1935–May 1939 48-Month	173.67" (4,411.22mm)	167.92" (4,265.17mm)	5.75" (146.05mm)	80th Driest	Driest since: 1938	1966
Jun 1935–May 1939 48-Month	173.67" (4,411.22mm)	167.92" (4,265.17mm)	5.75" (146.05mm)	45th Wettest	Wettest since: 1930	2020
Jun 1934–May 1939 60-Month	214.44" (5,446.78mm)	209.84" (5,329.94mm)	4.60" (116.84mm)	70th Driest	Driest since: 1938	1967
Jun 1934–May 1939 60-Month	214.44" (5,446.78mm)	209.84" (5,329.94mm)	4.60" (116.84mm)	54th Wettest	Wettest since: 1930	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on April 2, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings