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 1990

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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 1990 1-Month	6.08" (154.43mm)	3.93" (99.82mm)	2.15" (54.61mm)	118th Driest	Driest since: 1988	1964
May 1990 1-Month	6.08" (154.43mm)	3.93" (99.82mm)	2.15" (54.61mm)	11th Wettest	Wettest since: 1989	1989
Apr–May 1990 2-Month	9.19" (233.43mm)	7.57" (192.28mm)	1.62" (41.15mm)	103rd Driest	Driest since: 1988	1926
Apr–May 1990 2-Month	9.19" (233.43mm)	7.57" (192.28mm)	1.62" (41.15mm)	26th Wettest	Wettest since: 1989	2011
Mar–May 1990 3-Month	10.88" (276.35mm)	11.06" (280.92mm)	-0.18" (-4.57mm)	64th Driest	Driest since: 1988	1926
Mar–May 1990 3-Month	10.88" (276.35mm)	11.06" (280.92mm)	-0.18" (-4.57mm)	65th Wettest	Wettest since: 1989	2011
Feb–May 1990 4-Month	13.76" (349.50mm)	13.66" (346.96mm)	0.10" (2.54mm)	64th Driest	Driest since: 1988	1941
	13.76" (349.50mm)	13.66" (346.96mm)	0.10" (2.54mm)	65th Wettest	Wettest since: 1989	2011
	Ties: 1980
Jan–May 1990 5-Month	17.39" (441.71mm)	16.71" (424.43mm)	0.68" (17.28mm)	79th Driest	Driest since: 1988	1941
Jan–May 1990 5-Month	17.39" (441.71mm)	16.71" (424.43mm)	0.68" (17.28mm)	50th Wettest	Wettest since: 1989	2011
Dec 1989–May 1990 6-Month	18.68" (474.47mm)	19.81" (503.17mm)	-1.13" (-28.70mm)	46th Driest	Driest since: 1988	1941
Dec 1989–May 1990 6-Month	18.68" (474.47mm)	19.81" (503.17mm)	-1.13" (-28.70mm)	82nd Wettest	Wettest since: 1989	2011
Nov 1989–May 1990 7-Month	21.51" (546.35mm)	23.02" (584.71mm)	-1.51" (-38.36mm)	46th Driest	Driest since: 1988	1934
Nov 1989–May 1990 7-Month	21.51" (546.35mm)	23.02" (584.71mm)	-1.51" (-38.36mm)	82nd Wettest	Wettest since: 1989	1952
Oct 1989–May 1990 8-Month	25.40" (645.16mm)	26.19" (665.23mm)	-0.79" (-20.07mm)	50th Driest	Driest since: 1988	1925
Oct 1989–May 1990 8-Month	25.40" (645.16mm)	26.19" (665.23mm)	-0.79" (-20.07mm)	78th Wettest	Wettest since: 1989	2011
Sep 1989–May 1990 9-Month	29.59" (751.59mm)	29.75" (755.65mm)	-0.16" (-4.06mm)	65th Driest	Driest since: 1989	1941
Sep 1989–May 1990 9-Month	29.59" (751.59mm)	29.75" (755.65mm)	-0.16" (-4.06mm)	63rd Wettest	Wettest since: 1986	2019
Aug 1989–May 1990 10-Month	31.79" (807.47mm)	33.62" (853.95mm)	-1.83" (-46.48mm)	41st Driest	Driest since: 1985	1931
Aug 1989–May 1990 10-Month	31.79" (807.47mm)	33.62" (853.95mm)	-1.83" (-46.48mm)	87th Wettest	Wettest since: 1989	2019
Jul 1989–May 1990 11-Month	36.45" (925.83mm)	37.82" (960.63mm)	-1.37" (-34.80mm)	47th Driest	Driest since: 1985	1931
	36.45" (925.83mm)	37.82" (960.63mm)	-1.37" (-34.80mm)	81st Wettest	Wettest since: 1989	2019
	Ties: 1995
Jun 1989–May 1990 12-Month	43.51" (1,105.15mm)	41.97" (1,066.04mm)	1.54" (39.11mm)	74th Driest	Driest since: 1989	1931
	43.51" (1,105.15mm)	41.97" (1,066.04mm)	1.54" (39.11mm)	54th Wettest	Wettest since: 1984	2019
	Ties: 1898
Dec 1988–May 1990 18-Month	63.19" (1,605.03mm)	61.76" (1,568.70mm)	1.43" (36.33mm)	73rd Driest	Driest since: 1989	1931
Dec 1988–May 1990 18-Month	63.19" (1,605.03mm)	61.76" (1,568.70mm)	1.43" (36.33mm)	54th Wettest	Wettest since: 1985	2019
Jun 1988–May 1990 24-Month	83.13" (2,111.50mm)	83.91" (2,131.31mm)	-0.78" (-19.81mm)	50th Driest	Driest since: 1989	1931
Jun 1988–May 1990 24-Month	83.13" (2,111.50mm)	83.91" (2,131.31mm)	-0.78" (-19.81mm)	77th Wettest	Wettest since: 1988	2019
Jun 1987–May 1990 36-Month	124.51" (3,162.55mm)	125.93" (3,198.62mm)	-1.42" (-36.07mm)	45th Driest	Driest since: 1989	1965
Jun 1987–May 1990 36-Month	124.51" (3,162.55mm)	125.93" (3,198.62mm)	-1.42" (-36.07mm)	81st Wettest	Wettest since: 1988	2020
Jun 1986–May 1990 48-Month	166.73" (4,234.94mm)	167.92" (4,265.17mm)	-1.19" (-30.23mm)	46th Driest	Driest since: 1989	1966
Jun 1986–May 1990 48-Month	166.73" (4,234.94mm)	167.92" (4,265.17mm)	-1.19" (-30.23mm)	79th Wettest	Wettest since: 1987	2020
Jun 1985–May 1990 60-Month	209.43" (5,319.52mm)	209.84" (5,329.94mm)	-0.41" (-10.42mm)	48th Driest	Driest since: 1989	1967
Jun 1985–May 1990 60-Month	209.43" (5,319.52mm)	209.84" (5,329.94mm)	-0.41" (-10.42mm)	76th Wettest	Wettest since: 1988	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