National Rankings

National Data Info
Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, April 1988

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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 1988
1-Month
2.32"
(58.93mm)
2.52"
(64.01mm)
-0.20"
(-5.08mm)
45th Driest
Driest since:
1987
84th Wettest
Wettest since:
1957
Ties: 1907, 1915, 2000
Mar–Apr 1988
2-Month
4.36"
(110.74mm)
5.03"
(127.76mm)
-0.67"
(-17.02mm)
19th Driest
Driest since:
1910
110th Wettest
Wettest since:
1973
Feb–Apr 1988
3-Month
5.88"
(149.35mm)
7.16"
(181.86mm)
-1.28"
(-32.51mm)
6th Driest
Driest since:
1910
123rd Wettest
Wettest since:
1983
Jan–Apr 1988
4-Month
7.85"
(199.39mm)
9.48"
(240.79mm)
-1.63"
(-41.40mm)
6th Driest
Driest since:
1910
123rd Wettest
Wettest since:
1998
Dec 1987–Apr 1988
5-Month
10.72"
(272.29mm)
11.82"
(300.23mm)
-1.10"
(-27.94mm)
25th Driest
Driest since:
1931
103rd Wettest
Wettest since:
1983
Nov 1987–Apr 1988
6-Month
13.27"
(337.06mm)
14.05"
(356.87mm)
-0.78"
(-19.81mm)
37th Driest
Driest since:
1977
91st Wettest
Wettest since:
1983
Oct 1987–Apr 1988
7-Month
14.42"
(366.27mm)
16.22"
(411.99mm)
-1.80"
(-45.72mm)
15th Driest
Driest since:
1981
113th Wettest
Wettest since:
1983
Sep 1987–Apr 1988
8-Month
16.61"
(421.89mm)
18.71"
(475.23mm)
-2.10"
(-53.34mm)
11th Driest
Driest since:
1918
117th Wettest
Wettest since:
2019
Aug 1987–Apr 1988
9-Month
19.35"
(491.49mm)
21.33"
(541.78mm)
-1.98"
(-50.29mm)
17th Driest
Driest since:
1918
111th Wettest
Wettest since:
2019
Jul 1987–Apr 1988
10-Month
22.18"
(563.37mm)
24.12"
(612.65mm)
-1.94"
(-49.28mm)
19th Driest
Driest since:
1931
109th Wettest
Wettest since:
2019
Jun 1987–Apr 1988
11-Month
24.99"
(634.75mm)
27.04"
(686.82mm)
-2.05"
(-52.07mm)
20th Driest
Driest since:
1931
108th Wettest
Wettest since:
2019
May 1987–Apr 1988
12-Month
28.23"
(717.04mm)
29.95"
(760.73mm)
-1.72"
(-43.69mm)
26th Driest
Driest since:
1918
102nd Wettest
Wettest since:
2019
Nov 1986–Apr 1988
18-Month
41.80"
(1,061.72mm)
44.02"
(1,118.11mm)
-2.22"
(-56.39mm)
26th Driest
Driest since:
1931
101st Wettest
Wettest since:
2020
May 1986–Apr 1988
24-Month
59.75"
(1,517.65mm)
59.92"
(1,521.97mm)
-0.17"
(-4.32mm)
60th Driest
Driest since:
1955
67th Wettest
Wettest since:
2020
May 1985–Apr 1988
36-Month
90.24"
(2,292.10mm)
89.88"
(2,282.95mm)
0.36"
(9.15mm)
70th Driest
Driest since:
1955
56th Wettest
Wettest since:
2020
May 1984–Apr 1988
48-Month
120.45"
(3,059.43mm)
119.77"
(3,042.16mm)
0.68"
(17.27mm)
64th Driest
Driest since:
1956
61st Wettest
Wettest since:
2019
May 1983–Apr 1988
60-Month
152.71"
(3,878.83mm)
149.63"
(3,800.60mm)
3.08"
(78.23mm)
79th Driest
Driest since:
1957
45th Wettest
Wettest since:
2020

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