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 2004

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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 2004 1-Month	5.44" (138.18mm)	3.93" (99.82mm)	1.51" (38.36mm)	105th Driest	Driest since: 2003	1964
May 2004 1-Month	5.44" (138.18mm)	3.93" (99.82mm)	1.51" (38.36mm)	24th Wettest	Wettest since: 2002	1989
Apr–May 2004 2-Month	10.31" (261.87mm)	7.57" (192.28mm)	2.74" (69.59mm)	118th Driest	Driest since: 2003	1926
Apr–May 2004 2-Month	10.31" (261.87mm)	7.57" (192.28mm)	2.74" (69.59mm)	11th Wettest	Wettest since: 1984	2011
Mar–May 2004 3-Month	13.15" (334.01mm)	11.06" (280.92mm)	2.09" (53.09mm)	109th Driest	Driest since: 2003	1926
Mar–May 2004 3-Month	13.15" (334.01mm)	11.06" (280.92mm)	2.09" (53.09mm)	20th Wettest	Wettest since: 2002	2011
Feb–May 2004 4-Month	15.41" (391.41mm)	13.66" (346.96mm)	1.75" (44.45mm)	100th Driest	Driest since: 2003	1941
Feb–May 2004 4-Month	15.41" (391.41mm)	13.66" (346.96mm)	1.75" (44.45mm)	29th Wettest	Wettest since: 1998	2011
Jan–May 2004 5-Month	18.70" (474.98mm)	16.71" (424.43mm)	1.99" (50.55mm)	99th Driest	Driest since: 2003	1941
	18.70" (474.98mm)	16.71" (424.43mm)	1.99" (50.55mm)	30th Wettest	Wettest since: 1998	2011
	Ties: 1901
Dec 2003–May 2004 6-Month	22.87" (580.90mm)	19.81" (503.17mm)	3.06" (77.73mm)	109th Driest	Driest since: 2003	1941
Dec 2003–May 2004 6-Month	22.87" (580.90mm)	19.81" (503.17mm)	3.06" (77.73mm)	19th Wettest	Wettest since: 1998	2011
Nov 2003–May 2004 7-Month	27.17" (690.12mm)	23.02" (584.71mm)	4.15" (105.41mm)	112th Driest	Driest since: 2003	1934
Nov 2003–May 2004 7-Month	27.17" (690.12mm)	23.02" (584.71mm)	4.15" (105.41mm)	16th Wettest	Wettest since: 1998	1952
Oct 2003–May 2004 8-Month	31.36" (796.54mm)	26.19" (665.23mm)	5.17" (131.31mm)	115th Driest	Driest since: 2003	1925
Oct 2003–May 2004 8-Month	31.36" (796.54mm)	26.19" (665.23mm)	5.17" (131.31mm)	13th Wettest	Wettest since: 1996	2011
Sep 2003–May 2004 9-Month	38.49" (977.65mm)	29.75" (755.65mm)	8.74" (222.00mm)	124th Driest	Driest since: 2003	1941
Sep 2003–May 2004 9-Month	38.49" (977.65mm)	29.75" (755.65mm)	8.74" (222.00mm)	4th Wettest	Wettest since: 1908	2019
Aug 2003–May 2004 10-Month	44.04" (1,118.62mm)	33.62" (853.95mm)	10.42" (264.67mm)	125th Driest	Driest since: 2003	1931
Aug 2003–May 2004 10-Month	44.04" (1,118.62mm)	33.62" (853.95mm)	10.42" (264.67mm)	3rd Wettest	Wettest to Date	2019
Jul 2003–May 2004 11-Month	49.68" (1,261.87mm)	37.82" (960.63mm)	11.86" (301.24mm)	126th Driest	Driest since: 2003	1931
Jul 2003–May 2004 11-Month	49.68" (1,261.87mm)	37.82" (960.63mm)	11.86" (301.24mm)	2nd Wettest	Wettest to Date	2019
Jun 2003–May 2004 12-Month	55.79" (1,417.07mm)	41.97" (1,066.04mm)	13.82" (351.03mm)	126th Driest	Driest since: 2003	1931
Jun 2003–May 2004 12-Month	55.79" (1,417.07mm)	41.97" (1,066.04mm)	13.82" (351.03mm)	2nd Wettest	Wettest to Date	2019
Dec 2002–May 2004 18-Month	76.08" (1,932.43mm)	61.76" (1,568.70mm)	14.32" (363.73mm)	124th Driest	Driest since: 2003	1931
Dec 2002–May 2004 18-Month	76.08" (1,932.43mm)	61.76" (1,568.70mm)	14.32" (363.73mm)	3rd Wettest	Wettest to Date	2019
Jun 2002–May 2004 24-Month	98.66" (2,505.96mm)	83.91" (2,131.31mm)	14.75" (374.65mm)	122nd Driest	Driest since: 2003	1931
Jun 2002–May 2004 24-Month	98.66" (2,505.96mm)	83.91" (2,131.31mm)	14.75" (374.65mm)	5th Wettest	Wettest to Date	2019
Jun 2001–May 2004 36-Month	136.84" (3,475.74mm)	125.93" (3,198.62mm)	10.91" (277.12mm)	102nd Driest	Driest since: 2003	1965
Jun 2001–May 2004 36-Month	136.84" (3,475.74mm)	125.93" (3,198.62mm)	10.91" (277.12mm)	24th Wettest	Wettest since: 1998	2020
Jun 2000–May 2004 48-Month	173.84" (4,415.54mm)	167.92" (4,265.17mm)	5.92" (150.37mm)	81st Driest	Driest since: 2003	1966
Jun 2000–May 2004 48-Month	173.84" (4,415.54mm)	167.92" (4,265.17mm)	5.92" (150.37mm)	44th Wettest	Wettest since: 1999	2020
Jun 1999–May 2004 60-Month	214.96" (5,459.98mm)	209.84" (5,329.94mm)	5.12" (130.04mm)	73rd Driest	Driest since: 2003	1967
Jun 1999–May 2004 60-Month	214.96" (5,459.98mm)	209.84" (5,329.94mm)	5.12" (130.04mm)	51st Wettest	Wettest since: 2000	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 5, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings