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 1981

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 1981
1-Month
2.19"
(55.63mm)
2.52"
(64.01mm)
-0.33"
(-8.38mm)
34th Driest
Driest since:
1987
95th Wettest
Wettest since:
1957
Mar–Apr 1981
2-Month
4.40"
(111.76mm)
5.03"
(127.76mm)
-0.63"
(-16.00mm)
22nd Driest
Driest since:
1910
107th Wettest
Wettest since:
1973
Feb–Apr 1981
3-Month
6.57"
(166.88mm)
7.16"
(181.86mm)
-0.59"
(-14.98mm)
29th Driest
Driest since:
1910
100th Wettest
Wettest since:
1983
Ties: 1978
Jan–Apr 1981
4-Month
7.55"
(191.77mm)
9.47"
(240.54mm)
-1.92"
(-48.77mm)
2nd Driest
Driest since:
1910
127th Wettest
Wettest since:
1998
Dec 1980–Apr 1981
5-Month
9.12"
(231.65mm)
11.82"
(300.23mm)
-2.70"
(-68.58mm)
2nd Driest
Driest since:
1931
126th Wettest
Wettest since:
1983
Nov 1980–Apr 1981
6-Month
10.88"
(276.35mm)
14.05"
(356.87mm)
-3.17"
(-80.52mm)
2nd Driest
Driest since:
1977
126th Wettest
Wettest since:
1983
Oct 1980–Apr 1981
7-Month
12.75"
(323.85mm)
16.22"
(411.99mm)
-3.47"
(-88.14mm)
1st Driest
Driest since:
1981
127th Wettest
Wettest since:
1983
Sep 1980–Apr 1981
8-Month
15.54"
(394.72mm)
18.71"
(475.23mm)
-3.17"
(-80.51mm)
3rd Driest
Driest since:
1918
125th Wettest
Wettest since:
2019
Ties: 1977
Aug 1980–Apr 1981
9-Month
18.11"
(459.99mm)
21.33"
(541.78mm)
-3.22"
(-81.79mm)
4th Driest
Driest since:
1918
124th Wettest
Wettest since:
2019
Jul 1980–Apr 1981
10-Month
20.08"
(510.03mm)
24.12"
(612.65mm)
-4.04"
(-102.62mm)
3rd Driest
Driest since:
1931
125th Wettest
Wettest since:
2019
Jun 1980–Apr 1981
11-Month
22.39"
(568.71mm)
27.04"
(686.82mm)
-4.65"
(-118.11mm)
3rd Driest
Driest since:
1931
125th Wettest
Wettest since:
2019
May 1980–Apr 1981
12-Month
25.48"
(647.19mm)
29.95"
(760.73mm)
-4.47"
(-113.54mm)
3rd Driest
Driest since:
1918
125th Wettest
Wettest since:
2019
Nov 1979–Apr 1981
18-Month
40.02"
(1,016.51mm)
44.02"
(1,118.11mm)
-4.00"
(-101.60mm)
12th Driest
Driest since:
1931
115th Wettest
Wettest since:
2020
Ties: 1934
May 1979–Apr 1981
24-Month
56.79"
(1,442.47mm)
59.92"
(1,521.97mm)
-3.13"
(-79.50mm)
24th Driest
Driest since:
1955
103rd Wettest
Wettest since:
2020
May 1978–Apr 1981
36-Month
88.96"
(2,259.58mm)
89.88"
(2,282.95mm)
-0.92"
(-23.37mm)
51st Driest
Driest since:
1955
75th Wettest
Wettest since:
2020
May 1977–Apr 1981
48-Month
120.97"
(3,072.64mm)
119.77"
(3,042.16mm)
1.20"
(30.48mm)
68th Driest
Driest since:
1956
57th Wettest
Wettest since:
2019
May 1976–Apr 1981
60-Month
146.95"
(3,732.53mm)
149.63"
(3,800.60mm)
-2.68"
(-68.07mm)
37th Driest
Driest since:
1957
87th Wettest
Wettest since:
2020

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