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 1999

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 1999
1-Month
3.04"
(77.22mm)
3.48"
(88.39mm)
-0.44"
(-11.17mm)
53rd Driest
Driest since:
1985
76th Wettest
Wettest since:
1983
Ties: 2019
Mar–Apr 1999
2-Month
7.35"
(186.69mm)
7.26"
(184.40mm)
0.09"
(2.29mm)
77th Driest
Driest since:
1915
52nd Wettest
Wettest since:
1983
Ties: 1972
Feb–Apr 1999
3-Month
9.91"
(251.71mm)
10.15"
(257.81mm)
-0.24"
(-6.10mm)
62nd Driest
Driest since:
2006
67th Wettest
Wettest since:
1983
Jan–Apr 1999
4-Month
15.31"
(388.87mm)
13.51"
(343.15mm)
1.80"
(45.72mm)
102nd Driest
Driest since:
1985
27th Wettest
Wettest since:
1998
Ties: 1975
Dec 1998–Apr 1999
5-Month
17.42"
(442.47mm)
16.79"
(426.47mm)
0.63"
(16.00mm)
78th Driest
Driest since:
1985
50th Wettest
Wettest since:
1937
Nov 1998–Apr 1999
6-Month
18.46"
(468.88mm)
19.78"
(502.41mm)
-1.32"
(-33.53mm)
54th Driest
Driest since:
1977
74th Wettest
Wettest since:
1998
Oct 1998–Apr 1999
7-Month
20.23"
(513.84mm)
22.91"
(581.91mm)
-2.68"
(-68.07mm)
34th Driest
Driest since:
2002
94th Wettest
Wettest since:
1984
Sep 1998–Apr 1999
8-Month
22.01"
(559.05mm)
26.46"
(672.08mm)
-4.45"
(-113.03mm)
16th Driest
Driest since:
1931
112th Wettest
Wettest since:
2019
Aug 1998–Apr 1999
9-Month
24.35"
(618.49mm)
30.83"
(783.08mm)
-6.48"
(-164.59mm)
8th Driest
Driest since:
1931
120th Wettest
Wettest since:
2019
Jul 1998–Apr 1999
10-Month
26.57"
(674.88mm)
34.99"
(888.75mm)
-8.42"
(-213.87mm)
4th Driest
Driest since:
1931
124th Wettest
Wettest since:
2019
Jun 1998–Apr 1999
11-Month
31.56"
(801.62mm)
38.83"
(986.28mm)
-7.27"
(-184.66mm)
9th Driest
Driest since:
1931
119th Wettest
Wettest since:
2019
May 1998–Apr 1999
12-Month
36.30"
(922.02mm)
42.55"
(1,080.77mm)
-6.25"
(-158.75mm)
18th Driest
Driest since:
1931
110th Wettest
Wettest since:
2019
Nov 1997–Apr 1999
18-Month
66.45"
(1,687.83mm)
62.30"
(1,582.42mm)
4.15"
(105.41mm)
94th Driest
Driest since:
1931
33rd Wettest
Wettest since:
2004
May 1997–Apr 1999
24-Month
83.92"
(2,131.57mm)
85.06"
(2,160.52mm)
-1.14"
(-28.95mm)
50th Driest
Driest since:
1931
77th Wettest
Wettest since:
2019
May 1996–Apr 1999
36-Month
139.68"
(3,547.87mm)
127.66"
(3,242.56mm)
12.02"
(305.31mm)
109th Driest
Driest since:
1967
17th Wettest
Wettest since:
2021
May 1995–Apr 1999
48-Month
185.09"
(4,701.29mm)
170.21"
(4,323.33mm)
14.88"
(377.96mm)
107th Driest
Driest since:
1968
18th Wettest
Wettest since:
2021
May 1994–Apr 1999
60-Month
221.08"
(5,615.43mm)
212.58"
(5,399.53mm)
8.50"
(215.90mm)
86th Driest
Driest since:
1967
38th Wettest
Wettest since:
2021

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