Statewide Rankings

Statewide Data Info
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 2011

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
May 2011
1-Month 		5.70"
(144.78mm)		 3.93"
(99.82mm)		 1.77"
(44.96mm)		 109th Driest
Driest since:
 1964
20th Wettest
Wettest since:
 1989
Apr–May 2011
2-Month 		13.76"
(349.50mm)		 7.57"
(192.28mm)		 6.19"
(157.22mm)		 128th Driest
Driest since:
 1926
1st Wettest
Wettest to Date
 2011
Mar–May 2011
3-Month 		19.55"
(496.57mm)		 11.06"
(280.92mm)		 8.49"
(215.65mm)		 128th Driest
Driest since:
 1926
1st Wettest
Wettest to Date
 2011
Feb–May 2011
4-Month 		23.28"
(591.31mm)		 13.66"
(346.96mm)		 9.62"
(244.35mm)		 128th Driest
Driest since:
 1941
1st Wettest
Wettest to Date
 2011
Jan–May 2011
5-Month 		25.18"
(639.57mm)		 16.71"
(424.43mm)		 8.47"
(215.14mm)		 128th Driest
Driest since:
 1941
1st Wettest
Wettest to Date
 2011
Dec 2010–May 2011
6-Month 		28.62"
(726.95mm)		 19.81"
(503.17mm)		 8.81"
(223.78mm)		 127th Driest
Driest since:
 1941
1st Wettest
Wettest to Date
 2011
Nov 2010–May 2011
7-Month 		31.91"
(810.51mm)		 23.02"
(584.71mm)		 8.89"
(225.80mm)		 125th Driest
Driest since:
 1934
3rd Wettest
Wettest since:
 1952
Oct 2010–May 2011
8-Month 		37.06"
(941.32mm)		 26.19"
(665.23mm)		 10.87"
(276.09mm)		 127th Driest
Driest since:
 1925
1st Wettest
Wettest to Date
 2011
Sep 2010–May 2011
9-Month 		40.47"
(1,027.94mm)		 29.75"
(755.65mm)		 10.72"
(272.29mm)		 126th Driest
Driest since:
 1941
2nd Wettest
Wettest to Date
 2019
Aug 2010–May 2011
10-Month 		43.58"
(1,106.93mm)		 33.62"
(853.95mm)		 9.96"
(252.98mm)		 124th Driest
Driest since:
 1931
4th Wettest
Wettest since:
 2019
Jul 2010–May 2011
11-Month 		48.22"
(1,224.79mm)		 37.82"
(960.63mm)		 10.40"
(264.16mm)		 125th Driest
Driest since:
 1931
3rd Wettest
Wettest since:
 2019
Jun 2010–May 2011
12-Month 		51.85"
(1,316.99mm)		 41.97"
(1,066.04mm)		 9.88"
(250.95mm)		 123rd Driest
Driest since:
 1931
5th Wettest
Wettest since:
 2019
Dec 2009–May 2011
18-Month 		71.88"
(1,825.75mm)		 61.76"
(1,568.70mm)		 10.12"
(257.05mm)		 118th Driest
Driest since:
 1931
9th Wettest
Wettest since:
 2019
Jun 2009–May 2011
24-Month 		95.90"
(2,435.86mm)		 83.91"
(2,131.31mm)		 11.99"
(304.55mm)		 117th Driest
Driest since:
 1931
10th Wettest
Wettest since:
 2019
Ties: 1952
Jun 2008–May 2011
36-Month 		136.15"
(3,458.21mm)		 125.93"
(3,198.62mm)		 10.22"
(259.59mm)		 98th Driest
Driest since:
 1965
28th Wettest
Wettest since:
 2020
Jun 2007–May 2011
48-Month 		183.89"
(4,670.81mm)		 167.92"
(4,265.17mm)		 15.97"
(405.64mm)		 109th Driest
Driest since:
 1966
16th Wettest
Wettest since:
 2020
Jun 2006–May 2011
60-Month 		233.45"
(5,929.63mm)		 209.84"
(5,329.94mm)		 23.61"
(599.69mm)		 115th Driest
Driest since:
 1967
9th Wettest
Wettest since:
 2022

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