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 2010

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
May 2010
1-Month		4.02"
(102.11mm)		3.93"
(99.82mm)		0.09"
(2.29mm)		71st Driest
Driest since:
1964
58th Wettest
Wettest since:
1989
Apr–May 2010
2-Month		6.33"
(160.78mm)		7.57"
(192.28mm)		-1.24"
(-31.50mm)		36th Driest
Driest since:
1926
93rd Wettest
Wettest since:
2011
Ties: 1995
Mar–May 2010
3-Month		9.90"
(251.46mm)		11.06"
(280.92mm)		-1.16"
(-29.46mm)		42nd Driest
Driest since:
1926
87th Wettest
Wettest since:
2011
Feb–May 2010
4-Month		12.56"
(319.02mm)		13.66"
(346.96mm)		-1.10"
(-27.94mm)		48th Driest
Driest since:
1941
81st Wettest
Wettest since:
2011
Jan–May 2010
5-Month		15.64"
(397.26mm)		16.71"
(424.43mm)		-1.07"
(-27.17mm)		50th Driest
Driest since:
1941
79th Wettest
Wettest since:
2011
Dec 2009–May 2010
6-Month		20.03"
(508.76mm)		19.81"
(503.17mm)		0.22"
(5.59mm)		69th Driest
Driest since:
1941
59th Wettest
Wettest since:
2011
Ties: 1914, 1991
Nov 2009–May 2010
7-Month		21.64"
(549.66mm)		23.02"
(584.71mm)		-1.38"
(-35.05mm)		48th Driest
Driest since:
1934
80th Wettest
Wettest since:
1952
Oct 2009–May 2010
8-Month		26.41"
(670.81mm)		26.19"
(665.23mm)		0.22"
(5.58mm)		67th Driest
Driest since:
1925
61st Wettest
Wettest since:
2011
Sep 2009–May 2010
9-Month		29.19"
(741.43mm)		29.75"
(755.65mm)		-0.56"
(-14.22mm)		58th Driest
Driest since:
1941
70th Wettest
Wettest since:
2019
Aug 2009–May 2010
10-Month		34.17"
(867.92mm)		33.62"
(853.95mm)		0.55"
(13.97mm)		70th Driest
Driest since:
1931
58th Wettest
Wettest since:
2019
Jul 2009–May 2010
11-Month		39.14"
(994.16mm)		37.82"
(960.63mm)		1.32"
(33.53mm)		74th Driest
Driest since:
1931
54th Wettest
Wettest since:
2019
Jun 2009–May 2010
12-Month		44.05"
(1,118.87mm)		41.97"
(1,066.04mm)		2.08"
(52.83mm)		78th Driest
Driest since:
1931
50th Wettest
Wettest since:
2019
Dec 2008–May 2010
18-Month		63.98"
(1,625.09mm)		61.76"
(1,568.70mm)		2.22"
(56.39mm)		80th Driest
Driest since:
1931
47th Wettest
Wettest since:
2019
Jun 2008–May 2010
24-Month		84.30"
(2,141.22mm)		83.91"
(2,131.31mm)		0.39"
(9.91mm)		58th Driest
Driest since:
1931
69th Wettest
Wettest since:
2019
Jun 2007–May 2010
36-Month		132.04"
(3,353.82mm)		125.93"
(3,198.62mm)		6.11"
(155.20mm)		88th Driest
Driest since:
1965
38th Wettest
Wettest since:
2020
Jun 2006–May 2010
48-Month		181.60"
(4,612.64mm)		167.92"
(4,265.17mm)		13.68"
(347.47mm)		103rd Driest
Driest since:
1966
22nd Wettest
Wettest since:
2020
Jun 2005–May 2010
60-Month		221.52"
(5,626.61mm)		209.84"
(5,329.94mm)		11.68"
(296.67mm)		97th Driest
Driest since:
1967
27th Wettest
Wettest since:
2022

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