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 1966

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 1966 1-Month	3.33" (84.58mm)	3.93" (99.82mm)	-0.60" (-15.24mm)	46th Driest	Driest since: 1965	1964
	3.33" (84.58mm)	3.93" (99.82mm)	-0.60" (-15.24mm)	83rd Wettest	Wettest since: 1960	1989
	Ties: 1981, 1992
Apr–May 1966 2-Month	6.69" (169.93mm)	7.57" (192.28mm)	-0.88" (-22.35mm)	50th Driest	Driest since: 1965	1926
Apr–May 1966 2-Month	6.69" (169.93mm)	7.57" (192.28mm)	-0.88" (-22.35mm)	79th Wettest	Wettest since: 1964	2011
Mar–May 1966 3-Month	9.11" (231.39mm)	11.06" (280.92mm)	-1.95" (-49.53mm)	26th Driest	Driest since: 1965	1926
Mar–May 1966 3-Month	9.11" (231.39mm)	11.06" (280.92mm)	-1.95" (-49.53mm)	103rd Wettest	Wettest since: 1964	2011
Feb–May 1966 4-Month	12.28" (311.91mm)	13.66" (346.96mm)	-1.38" (-35.05mm)	39th Driest	Driest since: 1965	1941
Feb–May 1966 4-Month	12.28" (311.91mm)	13.66" (346.96mm)	-1.38" (-35.05mm)	90th Wettest	Wettest since: 1964	2011
Jan–May 1966 5-Month	15.73" (399.54mm)	16.71" (424.43mm)	-0.98" (-24.89mm)	52nd Driest	Driest since: 1965	1941
	15.73" (399.54mm)	16.71" (424.43mm)	-0.98" (-24.89mm)	77th Wettest	Wettest since: 1964	2011
	Ties: 1982
Dec 1965–May 1966 6-Month	16.99" (431.55mm)	19.81" (503.17mm)	-2.82" (-71.62mm)	20th Driest	Driest since: 1963	1941
Dec 1965–May 1966 6-Month	16.99" (431.55mm)	19.81" (503.17mm)	-2.82" (-71.62mm)	108th Wettest	Wettest since: 1965	2011
Nov 1965–May 1966 7-Month	19.42" (493.27mm)	23.02" (584.71mm)	-3.60" (-91.44mm)	13th Driest	Driest since: 1963	1934
Nov 1965–May 1966 7-Month	19.42" (493.27mm)	23.02" (584.71mm)	-3.60" (-91.44mm)	115th Wettest	Wettest since: 1965	1952
Oct 1965–May 1966 8-Month	22.93" (582.42mm)	26.19" (665.23mm)	-3.26" (-82.81mm)	23rd Driest	Driest since: 1965	1925
Oct 1965–May 1966 8-Month	22.93" (582.42mm)	26.19" (665.23mm)	-3.26" (-82.81mm)	105th Wettest	Wettest since: 1964	2011
Sep 1965–May 1966 9-Month	26.43" (671.32mm)	29.75" (755.65mm)	-3.32" (-84.33mm)	25th Driest	Driest since: 1965	1941
Sep 1965–May 1966 9-Month	26.43" (671.32mm)	29.75" (755.65mm)	-3.32" (-84.33mm)	103rd Wettest	Wettest since: 1964	2019
Aug 1965–May 1966 10-Month	30.63" (778.00mm)	33.62" (853.95mm)	-2.99" (-75.95mm)	30th Driest	Driest since: 1965	1931
Aug 1965–May 1966 10-Month	30.63" (778.00mm)	33.62" (853.95mm)	-2.99" (-75.95mm)	98th Wettest	Wettest since: 1961	2019
Jul 1965–May 1966 11-Month	33.14" (841.76mm)	37.82" (960.63mm)	-4.68" (-118.87mm)	17th Driest	Driest since: 1965	1931
Jul 1965–May 1966 11-Month	33.14" (841.76mm)	37.82" (960.63mm)	-4.68" (-118.87mm)	111th Wettest	Wettest since: 1964	2019
Jun 1965–May 1966 12-Month	35.26" (895.60mm)	41.97" (1,066.04mm)	-6.71" (-170.44mm)	10th Driest	Driest since: 1965	1931
Jun 1965–May 1966 12-Month	35.26" (895.60mm)	41.97" (1,066.04mm)	-6.71" (-170.44mm)	118th Wettest	Wettest since: 1964	2019
Dec 1964–May 1966 18-Month	53.34" (1,354.84mm)	61.76" (1,568.70mm)	-8.42" (-213.86mm)	8th Driest	Driest since: 1965	1931
Dec 1964–May 1966 18-Month	53.34" (1,354.84mm)	61.76" (1,568.70mm)	-8.42" (-213.86mm)	119th Wettest	Wettest since: 1962	2019
Jun 1964–May 1966 24-Month	69.05" (1,753.87mm)	83.91" (2,131.31mm)	-14.86" (-377.44mm)	2nd Driest	Driest since: 1931	1931
Jun 1964–May 1966 24-Month	69.05" (1,753.87mm)	83.91" (2,131.31mm)	-14.86" (-377.44mm)	125th Wettest	Wettest since: 1965	2019
Jun 1963–May 1966 36-Month	105.63" (2,683.00mm)	125.93" (3,198.62mm)	-20.30" (-515.62mm)	3rd Driest	Driest since: 1965	1965
Jun 1963–May 1966 36-Month	105.63" (2,683.00mm)	125.93" (3,198.62mm)	-20.30" (-515.62mm)	123rd Wettest	Wettest since: 1964	2020
Jun 1962–May 1966 48-Month	140.41" (3,566.41mm)	167.92" (4,265.17mm)	-27.51" (-698.76mm)	1st Driest	Driest since: 1966	1966
Jun 1962–May 1966 48-Month	140.41" (3,566.41mm)	167.92" (4,265.17mm)	-27.51" (-698.76mm)	124th Wettest	Wettest since: 1965	2020
Jun 1961–May 1966 60-Month	178.40" (4,531.36mm)	209.84" (5,329.94mm)	-31.44" (-798.58mm)	2nd Driest	Driest since: 1966	1967
Jun 1961–May 1966 60-Month	178.40" (4,531.36mm)	209.84" (5,329.94mm)	-31.44" (-798.58mm)	122nd Wettest	Wettest since: 1965	2022

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on February 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings