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 2006

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 2006
1-Month
2.54"
(64.52mm)
2.52"
(64.01mm)
0.02"
(0.51mm)
71st Driest
Driest since:
1987
58th Wettest
Wettest since:
1957
Ties: 1933, 1948, 1978, 2008
Mar–Apr 2006
2-Month
4.85"
(123.19mm)
5.03"
(127.76mm)
-0.18"
(-4.57mm)
57th Driest
Driest since:
1910
72nd Wettest
Wettest since:
1973
Ties: 2002
Feb–Apr 2006
3-Month
6.37"
(161.80mm)
7.16"
(181.86mm)
-0.79"
(-20.06mm)
19th Driest
Driest since:
1910
110th Wettest
Wettest since:
1983
Jan–Apr 2006
4-Month
8.98"
(228.09mm)
9.48"
(240.79mm)
-0.50"
(-12.70mm)
47th Driest
Driest since:
1910
82nd Wettest
Wettest since:
1998
Dec 2005–Apr 2006
5-Month
11.27"
(286.26mm)
11.82"
(300.23mm)
-0.55"
(-13.97mm)
39th Driest
Driest since:
1931
89th Wettest
Wettest since:
1983
Ties: 2018
Nov 2005–Apr 2006
6-Month
13.49"
(342.65mm)
14.05"
(356.87mm)
-0.56"
(-14.22mm)
48th Driest
Driest since:
1977
80th Wettest
Wettest since:
1983
Ties: 1986
Oct 2005–Apr 2006
7-Month
15.86"
(402.84mm)
16.22"
(411.99mm)
-0.36"
(-9.15mm)
53rd Driest
Driest since:
1981
75th Wettest
Wettest since:
1983
Sep 2005–Apr 2006
8-Month
17.80"
(452.12mm)
18.71"
(475.23mm)
-0.91"
(-23.11mm)
39th Driest
Driest since:
1918
89th Wettest
Wettest since:
2019
Aug 2005–Apr 2006
9-Month
20.79"
(528.07mm)
21.33"
(541.78mm)
-0.54"
(-13.71mm)
46th Driest
Driest since:
1918
82nd Wettest
Wettest since:
2019
Jul 2005–Apr 2006
10-Month
23.49"
(596.65mm)
24.12"
(612.65mm)
-0.63"
(-16.00mm)
45th Driest
Driest since:
1931
83rd Wettest
Wettest since:
2019
Jun 2005–Apr 2006
11-Month
26.63"
(676.40mm)
27.04"
(686.82mm)
-0.41"
(-10.42mm)
46th Driest
Driest since:
1931
82nd Wettest
Wettest since:
2019
May 2005–Apr 2006
12-Month
29.39"
(746.51mm)
29.95"
(760.73mm)
-0.56"
(-14.22mm)
47th Driest
Driest since:
1918
81st Wettest
Wettest since:
2019
Nov 2004–Apr 2006
18-Month
44.42"
(1,128.27mm)
44.02"
(1,118.11mm)
0.40"
(10.16mm)
68th Driest
Driest since:
1931
59th Wettest
Wettest since:
2020
May 2004–Apr 2006
24-Month
63.38"
(1,609.85mm)
59.92"
(1,521.97mm)
3.46"
(87.88mm)
104th Driest
Driest since:
1955
23rd Wettest
Wettest since:
2020
May 2003–Apr 2006
36-Month
93.81"
(2,382.77mm)
89.88"
(2,282.95mm)
3.93"
(99.82mm)
99th Driest
Driest since:
1955
27th Wettest
Wettest since:
2020
May 2002–Apr 2006
48-Month
123.69"
(3,141.73mm)
119.77"
(3,042.16mm)
3.92"
(99.57mm)
96th Driest
Driest since:
1956
29th Wettest
Wettest since:
2019
May 2001–Apr 2006
60-Month
152.16"
(3,864.86mm)
149.63"
(3,800.60mm)
2.53"
(64.26mm)
73rd Driest
Driest since:
1957
51st Wettest
Wettest since:
2020

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