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 2011

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 2011
1-Month
3.42"
(86.87mm)
2.52"
(64.01mm)
0.90"
(22.86mm)
126th Driest
Driest since:
1987
3rd Wettest
Wettest since:
1957
Mar–Apr 2011
2-Month
6.33"
(160.78mm)
5.03"
(127.76mm)
1.30"
(33.02mm)
123rd Driest
Driest since:
1910
6th Wettest
Wettest since:
1973
Ties: 1944
Feb–Apr 2011
3-Month
8.31"
(211.07mm)
7.16"
(181.86mm)
1.15"
(29.21mm)
113th Driest
Driest since:
1910
16th Wettest
Wettest since:
1983
Jan–Apr 2011
4-Month
9.96"
(252.98mm)
9.48"
(240.79mm)
0.48"
(12.19mm)
91st Driest
Driest since:
1910
38th Wettest
Wettest since:
1998
Dec 2010–Apr 2011
5-Month
12.41"
(315.21mm)
11.82"
(300.23mm)
0.59"
(14.98mm)
92nd Driest
Driest since:
1931
36th Wettest
Wettest since:
1983
Ties: 1916
Nov 2010–Apr 2011
6-Month
14.63"
(371.60mm)
14.05"
(356.87mm)
0.58"
(14.73mm)
91st Driest
Driest since:
1977
37th Wettest
Wettest since:
1983
Ties: 1937
Oct 2010–Apr 2011
7-Month
16.60"
(421.64mm)
16.22"
(411.99mm)
0.38"
(9.65mm)
80th Driest
Driest since:
1981
48th Wettest
Wettest since:
1983
Sep 2010–Apr 2011
8-Month
19.38"
(492.25mm)
18.71"
(475.23mm)
0.67"
(17.02mm)
86th Driest
Driest since:
1918
42nd Wettest
Wettest since:
2019
Ties: 1960
Aug 2010–Apr 2011
9-Month
21.89"
(556.01mm)
21.33"
(541.78mm)
0.56"
(14.23mm)
81st Driest
Driest since:
1918
47th Wettest
Wettest since:
2019
Jul 2010–Apr 2011
10-Month
25.21"
(640.33mm)
24.12"
(612.65mm)
1.09"
(27.68mm)
92nd Driest
Driest since:
1931
36th Wettest
Wettest since:
2019
Jun 2010–Apr 2011
11-Month
28.70"
(728.98mm)
27.04"
(686.82mm)
1.66"
(42.16mm)
99th Driest
Driest since:
1931
29th Wettest
Wettest since:
2019
May 2010–Apr 2011
12-Month
32.02"
(813.31mm)
29.95"
(760.73mm)
2.07"
(52.58mm)
105th Driest
Driest since:
1918
23rd Wettest
Wettest since:
2019
Nov 2009–Apr 2011
18-Month
46.04"
(1,169.42mm)
44.02"
(1,118.11mm)
2.02"
(51.31mm)
96th Driest
Driest since:
1931
31st Wettest
Wettest since:
2020
May 2009–Apr 2011
24-Month
64.95"
(1,649.73mm)
59.92"
(1,521.97mm)
5.03"
(127.76mm)
114th Driest
Driest since:
1955
13th Wettest
Wettest since:
2020
May 2008–Apr 2011
36-Month
95.13"
(2,416.30mm)
89.88"
(2,282.95mm)
5.25"
(133.35mm)
106th Driest
Driest since:
1955
20th Wettest
Wettest since:
2020
May 2007–Apr 2011
48-Month
125.27"
(3,181.86mm)
119.77"
(3,042.16mm)
5.50"
(139.70mm)
103rd Driest
Driest since:
1956
22nd Wettest
Wettest since:
2019
May 2006–Apr 2011
60-Month
154.89"
(3,934.21mm)
149.63"
(3,800.60mm)
5.26"
(133.61mm)
99th Driest
Driest since:
1957
25th Wettest
Wettest since:
2020

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