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.

Maryland

Precipitation Rankings, April 2021

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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 2021
1-Month 		2.75"
(69.85mm)		 3.48"
(88.39mm)		 -0.73"
(-18.54mm)		 40th Driest
Driest since:
 1985
89th Wettest
Wettest since:
 1983
Mar–Apr 2021
2-Month 		6.17"
(156.72mm)		 7.26"
(184.40mm)		 -1.09"
(-27.68mm)		 37th Driest
Driest since:
 1915
92nd Wettest
Wettest since:
 1983
Feb–Apr 2021
3-Month 		10.51"
(266.95mm)		 10.15"
(257.81mm)		 0.36"
(9.14mm)		 78th Driest
Driest since:
 2006
51st Wettest
Wettest since:
 1983
Jan–Apr 2021
4-Month 		12.58"
(319.53mm)		 13.50"
(342.90mm)		 -0.92"
(-23.37mm)		 52nd Driest
Driest since:
 1985
77th Wettest
Wettest since:
 1998
Ties: 1987
Dec 2020–Apr 2021
5-Month 		17.99"
(456.95mm)		 16.79"
(426.47mm)		 1.20"
(30.48mm)		 91st Driest
Driest since:
 1985
37th Wettest
Wettest since:
 1937
Ties: 1944
Nov 2020–Apr 2021
6-Month 		22.75"
(577.85mm)		 19.78"
(502.41mm)		 2.97"
(75.44mm)		 101st Driest
Driest since:
 1977
27th Wettest
Wettest since:
 1998
Oct 2020–Apr 2021
7-Month 		27.39"
(695.71mm)		 22.91"
(581.91mm)		 4.48"
(113.80mm)		 106th Driest
Driest since:
 2002
22nd Wettest
Wettest since:
 1984
Sep 2020–Apr 2021
8-Month 		31.41"
(797.81mm)		 26.46"
(672.08mm)		 4.95"
(125.73mm)		 104th Driest
Driest since:
 1931
24th Wettest
Wettest since:
 2019
Aug 2020–Apr 2021
9-Month 		40.35"
(1,024.89mm)		 30.83"
(783.08mm)		 9.52"
(241.81mm)		 125th Driest
Driest since:
 1931
3rd Wettest
Wettest since:
 2019
Jul 2020–Apr 2021
10-Month 		44.72"
(1,135.89mm)		 34.99"
(888.75mm)		 9.73"
(247.14mm)		 126th Driest
Driest since:
 1931
2nd Wettest
Wettest since:
 2019
Jun 2020–Apr 2021
11-Month 		48.33"
(1,227.58mm)		 38.83"
(986.28mm)		 9.50"
(241.30mm)		 120th Driest
Driest since:
 1931
8th Wettest
Wettest since:
 2019
May 2020–Apr 2021
12-Month 		51.39"
(1,305.31mm)		 42.55"
(1,080.77mm)		 8.84"
(224.54mm)		 118th Driest
Driest since:
 1931
10th Wettest
Wettest since:
 2019
Nov 2019–Apr 2021
18-Month 		70.72"
(1,796.29mm)		 62.30"
(1,582.42mm)		 8.42"
(213.87mm)		 111th Driest
Driest since:
 1931
16th Wettest
Wettest since:
 2004
May 2019–Apr 2021
24-Month 		94.14"
(2,391.16mm)		 85.06"
(2,160.52mm)		 9.08"
(230.64mm)		 107th Driest
Driest since:
 1931
20th Wettest
Wettest since:
 2019
May 2018–Apr 2021
36-Month 		159.08"
(4,040.63mm)		 127.66"
(3,242.56mm)		 31.42"
(798.07mm)		 125th Driest
Driest since:
 1967
1st Wettest
Wettest to Date
 2021
May 2017–Apr 2021
48-Month 		202.74"
(5,149.60mm)		 170.21"
(4,323.33mm)		 32.53"
(826.27mm)		 124th Driest
Driest since:
 1968
1st Wettest
Wettest to Date
 2021
May 2016–Apr 2021
60-Month 		244.67"
(6,214.62mm)		 212.58"
(5,399.53mm)		 32.09"
(815.09mm)		 123rd Driest
Driest since:
 1967
1st Wettest
Wettest to Date
 2021

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