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, May 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
May 2021
1-Month 		3.40"
(86.36mm)		 3.73"
(94.74mm)		 -0.33"
(-8.38mm)		 56th Driest
Driest since:
 1964
73rd Wettest
Wettest since:
 2018
Apr–May 2021
2-Month 		6.15"
(156.21mm)		 7.21"
(183.13mm)		 -1.06"
(-26.92mm)		 42nd Driest
Driest since:
 1963
87th Wettest
Wettest since:
 1983
Mar–May 2021
3-Month 		9.57"
(243.08mm)		 10.99"
(279.15mm)		 -1.42"
(-36.07mm)		 35th Driest
Driest since:
 1986
94th Wettest
Wettest since:
 1983
Feb–May 2021
4-Month 		13.91"
(353.31mm)		 13.88"
(352.55mm)		 0.03"
(0.76mm)		 69th Driest
Driest since:
 2006
60th Wettest
Wettest since:
 1983
Ties: 1978
Jan–May 2021
5-Month 		15.98"
(405.89mm)		 17.23"
(437.64mm)		 -1.25"
(-31.75mm)		 46th Driest
Driest since:
 1969
83rd Wettest
Wettest since:
 1998
Ties: 1950
Dec 2020–May 2021
6-Month 		21.39"
(543.31mm)		 20.52"
(521.21mm)		 0.87"
(22.10mm)		 83rd Driest
Driest since:
 1986
45th Wettest
Wettest since:
 1984
Nov 2020–May 2021
7-Month 		26.15"
(664.21mm)		 23.51"
(597.15mm)		 2.64"
(67.06mm)		 95th Driest
Driest since:
 1977
33rd Wettest
Wettest since:
 1998
Oct 2020–May 2021
8-Month 		30.79"
(782.07mm)		 26.64"
(676.66mm)		 4.15"
(105.41mm)		 103rd Driest
Driest since:
 1925
25th Wettest
Wettest since:
 1984
Sep 2020–May 2021
9-Month 		34.81"
(884.17mm)		 30.19"
(766.83mm)		 4.62"
(117.34mm)		 101st Driest
Driest since:
 2002
27th Wettest
Wettest since:
 2019
Aug 2020–May 2021
10-Month 		43.75"
(1,111.25mm)		 34.56"
(877.82mm)		 9.19"
(233.43mm)		 123rd Driest
Driest since:
 1931
5th Wettest
Wettest since:
 2019
Jul 2020–May 2021
11-Month 		48.12"
(1,222.25mm)		 38.72"
(983.49mm)		 9.40"
(238.76mm)		 124th Driest
Driest since:
 1931
4th Wettest
Wettest since:
 2019
Jun 2020–May 2021
12-Month 		51.73"
(1,313.94mm)		 42.56"
(1,081.02mm)		 9.17"
(232.92mm)		 123rd Driest
Driest since:
 1931
5th Wettest
Wettest since:
 2019
Dec 2019–May 2021
18-Month 		72.42"
(1,839.47mm)		 63.04"
(1,601.22mm)		 9.38"
(238.25mm)		 112th Driest
Driest since:
 1931
15th Wettest
Wettest since:
 2019
Jun 2019–May 2021
24-Month 		92.35"
(2,345.69mm)		 85.05"
(2,160.27mm)		 7.30"
(185.42mm)		 100th Driest
Driest since:
 1931
27th Wettest
Wettest since:
 2019
Jun 2018–May 2021
36-Month 		154.87"
(3,933.70mm)		 127.65"
(3,242.31mm)		 27.22"
(691.39mm)		 125th Driest
Driest since:
 1967
1st Wettest
Wettest to Date
 2021
Jun 2017–May 2021
48-Month 		200.29"
(5,087.37mm)		 170.18"
(4,322.57mm)		 30.11"
(764.80mm)		 124th Driest
Driest since:
 1966
1st Wettest
Wettest to Date
 2021
Jun 2016–May 2021
60-Month 		242.14"
(6,150.36mm)		 212.57"
(5,399.28mm)		 29.57"
(751.08mm)		 122nd Driest
Driest since:
 1969
2nd Wettest
Wettest to Date
 2022

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