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, April 2020

View Period (Months):
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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
April 2020
1-Month 		4.51"
(114.55mm)		 3.64"
(92.46mm)		 0.87"
(22.09mm)		 107th Driest
Driest since:
 1946
22nd Wettest
Wettest since:
 2011
Mar–Apr 2020
2-Month 		8.78"
(223.01mm)		 7.13"
(181.10mm)		 1.65"
(41.91mm)		 109th Driest
Driest since:
 1915
20th Wettest
Wettest since:
 2011
Feb–Apr 2020
3-Month 		12.13"
(308.10mm)		 9.73"
(247.14mm)		 2.40"
(60.96mm)		 114th Driest
Driest since:
 1941
15th Wettest
Wettest since:
 2011
Jan–Apr 2020
4-Month 		15.18"
(385.57mm)		 12.78"
(324.61mm)		 2.40"
(60.96mm)		 106th Driest
Driest since:
 1941
23rd Wettest
Wettest since:
 2011
Dec 2019–Apr 2020
5-Month 		18.89"
(479.81mm)		 15.88"
(403.35mm)		 3.01"
(76.46mm)		 109th Driest
Driest since:
 1941
19th Wettest
Wettest since:
 2011
Nov 2019–Apr 2020
6-Month 		21.33"
(541.78mm)		 19.09"
(484.89mm)		 2.24"
(56.89mm)		 100th Driest
Driest since:
 1931
28th Wettest
Wettest since:
 1952
Oct 2019–Apr 2020
7-Month 		26.94"
(684.28mm)		 22.26"
(565.40mm)		 4.68"
(118.88mm)		 113th Driest
Driest since:
 1925
15th Wettest
Wettest since:
 2011
Sep 2019–Apr 2020
8-Month 		29.07"
(738.38mm)		 25.83"
(656.08mm)		 3.24"
(82.30mm)		 100th Driest
Driest since:
 1931
28th Wettest
Wettest since:
 2019
Ties: 1976
Aug 2019–Apr 2020
9-Month 		32.78"
(832.61mm)		 29.69"
(754.13mm)		 3.09"
(78.48mm)		 95th Driest
Driest since:
 1931
33rd Wettest
Wettest since:
 2019
Jul 2019–Apr 2020
10-Month 		38.40"
(975.36mm)		 33.89"
(860.81mm)		 4.51"
(114.55mm)		 105th Driest
Driest since:
 1931
23rd Wettest
Wettest since:
 2019
Jun 2019–Apr 2020
11-Month 		44.22"
(1,123.19mm)		 38.05"
(966.47mm)		 6.17"
(156.72mm)		 111th Driest
Driest since:
 1931
17th Wettest
Wettest since:
 2019
May 2019–Apr 2020
12-Month 		50.74"
(1,288.80mm)		 41.95"
(1,065.53mm)		 8.79"
(223.27mm)		 121st Driest
Driest since:
 1931
7th Wettest
Wettest since:
 2019
Nov 2018–Apr 2020
18-Month 		76.28"
(1,937.51mm)		 61.03"
(1,550.16mm)		 15.25"
(387.35mm)		 123rd Driest
Driest since:
 1931
4th Wettest
Wettest since:
 2019
May 2018–Apr 2020
24-Month 		114.03"
(2,896.36mm)		 83.91"
(2,131.31mm)		 30.12"
(765.05mm)		 126th Driest
Driest since:
 1966
1st Wettest
Wettest to Date
 2020
May 2017–Apr 2020
36-Month 		162.29"
(4,122.17mm)		 125.93"
(3,198.62mm)		 36.36"
(923.55mm)		 125th Driest
Driest since:
 1967
1st Wettest
Wettest to Date
 2020
May 2016–Apr 2020
48-Month 		204.69"
(5,199.13mm)		 167.93"
(4,265.42mm)		 36.76"
(933.71mm)		 124th Driest
Driest since:
 1966
1st Wettest
Wettest to Date
 2020
May 2015–Apr 2020
60-Month 		247.70"
(6,291.58mm)		 209.83"
(5,329.68mm)		 37.87"
(961.90mm)		 122nd Driest
Driest since:
 1967
2nd Wettest
Wettest to Date
 2022

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