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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