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 2009

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 2009
1-Month
5.93"
(150.62mm)
3.73"
(94.74mm)
2.20"
(55.88mm)
118th Driest
Driest since:
1964
11th Wettest
Wettest since:
2018
Ties: 2016
Apr–May 2009
2-Month
10.62"
(269.75mm)
7.21"
(183.13mm)
3.41"
(86.62mm)
119th Driest
Driest since:
1963
10th Wettest
Wettest since:
1983
Mar–May 2009
3-Month
12.95"
(328.93mm)
10.99"
(279.15mm)
1.96"
(49.78mm)
100th Driest
Driest since:
1986
29th Wettest
Wettest since:
1983
Feb–May 2009
4-Month
13.46"
(341.88mm)
13.88"
(352.55mm)
-0.42"
(-10.67mm)
58th Driest
Driest since:
2006
71st Wettest
Wettest since:
1983
Jan–May 2009
5-Month
15.95"
(405.13mm)
17.23"
(437.64mm)
-1.28"
(-32.51mm)
43rd Driest
Driest since:
1969
86th Wettest
Wettest since:
1998
Ties: 1896
Dec 2008–May 2009
6-Month
20.72"
(526.29mm)
20.52"
(521.21mm)
0.20"
(5.08mm)
73rd Driest
Driest since:
1986
55th Wettest
Wettest since:
1984
Nov 2008–May 2009
7-Month
24.05"
(610.87mm)
23.51"
(597.15mm)
0.54"
(13.72mm)
78th Driest
Driest since:
1977
50th Wettest
Wettest since:
1998
Oct 2008–May 2009
8-Month
25.52"
(648.21mm)
26.64"
(676.66mm)
-1.12"
(-28.45mm)
58th Driest
Driest since:
1925
70th Wettest
Wettest since:
1984
Sep 2008–May 2009
9-Month
30.41"
(772.41mm)
30.19"
(766.83mm)
0.22"
(5.58mm)
69th Driest
Driest since:
2002
59th Wettest
Wettest since:
2019
Aug 2008–May 2009
10-Month
32.42"
(823.47mm)
34.56"
(877.82mm)
-2.14"
(-54.35mm)
46th Driest
Driest since:
1931
82nd Wettest
Wettest since:
2019
Jul 2008–May 2009
11-Month
36.63"
(930.40mm)
38.72"
(983.49mm)
-2.09"
(-53.09mm)
46th Driest
Driest since:
1931
82nd Wettest
Wettest since:
2019
Jun 2008–May 2009
12-Month
41.23"
(1,047.24mm)
42.56"
(1,081.02mm)
-1.33"
(-33.78mm)
52nd Driest
Driest since:
1931
76th Wettest
Wettest since:
2019
Dec 2007–May 2009
18-Month
65.16"
(1,655.06mm)
63.04"
(1,601.22mm)
2.12"
(53.84mm)
77th Driest
Driest since:
1931
50th Wettest
Wettest since:
2019
Jun 2007–May 2009
24-Month
82.11"
(2,085.59mm)
85.05"
(2,160.27mm)
-2.94"
(-74.68mm)
37th Driest
Driest since:
1931
90th Wettest
Wettest since:
2019
Jun 2006–May 2009
36-Month
130.56"
(3,316.22mm)
127.65"
(3,242.31mm)
2.91"
(73.91mm)
66th Driest
Driest since:
1967
60th Wettest
Wettest since:
2021
Jun 2005–May 2009
48-Month
168.30"
(4,274.82mm)
170.18"
(4,322.57mm)
-1.88"
(-47.75mm)
44th Driest
Driest since:
1966
81st Wettest
Wettest since:
2021
Jun 2004–May 2009
60-Month
216.12"
(5,489.45mm)
212.57"
(5,399.28mm)
3.55"
(90.17mm)
65th Driest
Driest since:
1969
59th Wettest
Wettest since:
2022

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