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, March 2012

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
March 2012
1-Month 		2.87"
(72.90mm)		 2.51"
(63.75mm)		 0.36"
(9.15mm)		 101st Driest
Driest since:
 1910
28th Wettest
Wettest since:
 1973
Feb–Mar 2012
2-Month 		4.72"
(119.89mm)		 4.64"
(117.86mm)		 0.08"
(2.03mm)		 75th Driest
Driest since:
 1910
54th Wettest
Wettest since:
 1998
Ties: 1936, 1950
Jan–Mar 2012
3-Month 		6.81"
(172.97mm)		 6.96"
(176.78mm)		 -0.15"
(-3.81mm)		 60th Driest
Driest since:
 1910
69th Wettest
Wettest since:
 1998
Ties: 1908
Dec 2011–Mar 2012
4-Month 		9.07"
(230.38mm)		 9.30"
(236.22mm)		 -0.23"
(-5.84mm)		 57th Driest
Driest since:
 1981
71st Wettest
Wettest since:
 1983, 1998
Nov 2011–Mar 2012
5-Month 		11.54"
(293.12mm)		 11.53"
(292.86mm)		 0.01"
(0.26mm)		 72nd Driest
Driest since:
 1977
56th Wettest
Wettest since:
 1983
Oct 2011–Mar 2012
6-Month 		13.68"
(347.47mm)		 13.70"
(347.98mm)		 -0.02"
(-0.51mm)		 66th Driest
Driest since:
 1918
62nd Wettest
Wettest since:
 1983
Sep 2011–Mar 2012
7-Month 		16.16"
(410.46mm)		 16.19"
(411.23mm)		 -0.03"
(-0.77mm)		 65th Driest
Driest since:
 1918
63rd Wettest
Wettest since:
 2019
Aug 2011–Mar 2012
8-Month 		18.50"
(469.90mm)		 18.82"
(478.03mm)		 -0.32"
(-8.13mm)		 51st Driest
Driest since:
 1918
77th Wettest
Wettest since:
 2019
Jul 2011–Mar 2012
9-Month 		20.94"
(531.88mm)		 21.60"
(548.64mm)		 -0.66"
(-16.76mm)		 40th Driest
Driest since:
 1918
88th Wettest
Wettest since:
 2019
Jun 2011–Mar 2012
10-Month 		23.52"
(597.41mm)		 24.53"
(623.06mm)		 -1.01"
(-25.65mm)		 38th Driest
Driest since:
 1918
90th Wettest
Wettest since:
 2019
May 2011–Mar 2012
11-Month 		26.95"
(684.53mm)		 27.43"
(696.72mm)		 -0.48"
(-12.19mm)		 46th Driest
Driest since:
 1918
82nd Wettest
Wettest since:
 2019
Apr 2011–Mar 2012
12-Month 		30.37"
(771.40mm)		 29.96"
(760.98mm)		 0.41"
(10.42mm)		 67th Driest
Driest since:
 1918
61st Wettest
Wettest since:
 2016
Oct 2010–Mar 2012
18-Month 		43.55"
(1,106.17mm)		 43.68"
(1,109.47mm)		 -0.13"
(-3.30mm)		 55th Driest
Driest since:
 1918
72nd Wettest
Wettest since:
 2020
Apr 2010–Mar 2012
24-Month 		61.35"
(1,558.29mm)		 59.92"
(1,521.97mm)		 1.43"
(36.32mm)		 75th Driest
Driest since:
 1955
52nd Wettest
Wettest since:
 2020
Apr 2009–Mar 2012
36-Month 		94.73"
(2,406.14mm)		 89.87"
(2,282.70mm)		 4.86"
(123.44mm)		 105th Driest
Driest since:
 1955
21st Wettest
Wettest since:
 2020
Apr 2008–Mar 2012
48-Month 		124.62"
(3,165.35mm)		 119.76"
(3,041.90mm)		 4.86"
(123.45mm)		 102nd Driest
Driest since:
 1957
23rd Wettest
Wettest since:
 2019
Apr 2007–Mar 2012
60-Month 		154.71"
(3,929.63mm)		 149.62"
(3,800.35mm)		 5.09"
(129.28mm)		 94th Driest
Driest since:
 1957
30th Wettest
Wettest since:
 2020

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