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 2018

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
May 2018
1-Month
7.61"
(193.29mm)
3.73"
(94.74mm)
3.88"
(98.55mm)
128th Driest
Driest since:
1964
1st Wettest
Wettest to Date
2018
Apr–May 2018
2-Month
11.36"
(288.54mm)
7.21"
(183.13mm)
4.15"
(105.41mm)
124th Driest
Driest since:
1963
5th Wettest
Wettest since:
1983
Mar–May 2018
3-Month
14.14"
(359.16mm)
10.99"
(279.15mm)
3.15"
(80.01mm)
114th Driest
Driest since:
1986
15th Wettest
Wettest since:
1983
Feb–May 2018
4-Month
18.87"
(479.30mm)
13.88"
(352.55mm)
4.99"
(126.75mm)
122nd Driest
Driest since:
2006
7th Wettest
Wettest since:
1983
Jan–May 2018
5-Month
21.27"
(540.26mm)
17.23"
(437.64mm)
4.04"
(102.62mm)
114th Driest
Driest since:
1969
15th Wettest
Wettest since:
1998
Dec 2017–May 2018
6-Month
22.22"
(564.39mm)
20.52"
(521.21mm)
1.70"
(43.18mm)
92nd Driest
Driest since:
1986
36th Wettest
Wettest since:
1984
Nov 2017–May 2018
7-Month
24.18"
(614.17mm)
23.51"
(597.15mm)
0.67"
(17.02mm)
83rd Driest
Driest since:
1977
45th Wettest
Wettest since:
1998
Oct 2017–May 2018
8-Month
27.97"
(710.44mm)
26.64"
(676.66mm)
1.33"
(33.78mm)
87th Driest
Driest since:
1925
41st Wettest
Wettest since:
1984
Sep 2017–May 2018
9-Month
29.98"
(761.49mm)
30.19"
(766.83mm)
-0.21"
(-5.34mm)
64th Driest
Driest since:
2002
64th Wettest
Wettest since:
2019
Ties: 1944, 1964
Aug 2017–May 2018
10-Month
35.55"
(902.97mm)
34.56"
(877.82mm)
0.99"
(25.15mm)
75th Driest
Driest since:
1931
53rd Wettest
Wettest since:
2019
Jul 2017–May 2018
11-Month
43.31"
(1,100.07mm)
38.72"
(983.49mm)
4.59"
(116.58mm)
96th Driest
Driest since:
1931
32nd Wettest
Wettest since:
2019
Ties: 1976
Jun 2017–May 2018
12-Month
45.42"
(1,153.67mm)
42.56"
(1,081.02mm)
2.86"
(72.65mm)
83rd Driest
Driest since:
1931
45th Wettest
Wettest since:
2019
Dec 2016–May 2018
18-Month
65.69"
(1,668.53mm)
63.04"
(1,601.22mm)
2.65"
(67.31mm)
83rd Driest
Driest since:
1931
44th Wettest
Wettest since:
2019
Jun 2016–May 2018
24-Month
87.27"
(2,216.66mm)
85.05"
(2,160.27mm)
2.22"
(56.39mm)
72nd Driest
Driest since:
1931
55th Wettest
Wettest since:
2019
Jun 2015–May 2018
36-Month
134.83"
(3,424.68mm)
127.65"
(3,242.31mm)
7.18"
(182.37mm)
91st Driest
Driest since:
1967
35th Wettest
Wettest since:
2021
Jun 2014–May 2018
48-Month
175.08"
(4,447.03mm)
170.18"
(4,322.57mm)
4.90"
(124.46mm)
80th Driest
Driest since:
1966
45th Wettest
Wettest since:
2021
Jun 2013–May 2018
60-Month
226.61"
(5,755.89mm)
212.57"
(5,399.28mm)
14.04"
(356.61mm)
99th Driest
Driest since:
1969
25th Wettest
Wettest since:
2022

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