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, July 2009

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
July 2009
1-Month		3.07"
(77.98mm)		2.78"
(70.61mm)		0.29"
(7.37mm)		105th Driest
Driest since:
1930
24th Wettest
Wettest since:
1950, 1958
Ties: 1900, 1928
Jun–Jul 2009
2-Month		6.08"
(154.43mm)		5.70"
(144.78mm)		0.38"
(9.65mm)		93rd Driest
Driest since:
1930
36th Wettest
Wettest since:
1928
May–Jul 2009
3-Month		9.39"
(238.51mm)		8.62"
(218.95mm)		0.77"
(19.56mm)		104th Driest
Driest since:
1988
25th Wettest
Wettest since:
2015
Apr–Jul 2009
4-Month		12.22"
(310.39mm)		11.13"
(282.70mm)		1.09"
(27.69mm)		106th Driest
Driest since:
1934
23rd Wettest
Wettest since:
2015
Mar–Jul 2009
5-Month		14.92"
(378.97mm)		13.64"
(346.46mm)		1.28"
(32.51mm)		108th Driest
Driest since:
1936
21st Wettest
Wettest since:
1973
Feb–Jul 2009
6-Month		16.47"
(418.34mm)		15.78"
(400.81mm)		0.69"
(17.53mm)		81st Driest
Driest since:
1934
48th Wettest
Wettest since:
2019
Ties: 1929
Jan–Jul 2009
7-Month		18.07"
(458.98mm)		18.09"
(459.49mm)		-0.02"
(-0.51mm)		61st Driest
Driest since:
1934
68th Wettest
Wettest since:
2019
Ties: 1984
Dec 2008–Jul 2009
8-Month		20.91"
(531.11mm)		20.44"
(519.18mm)		0.47"
(11.93mm)		72nd Driest
Driest since:
1931
56th Wettest
Wettest since:
2019
Nov 2008–Jul 2009
9-Month		22.86"
(580.64mm)		22.66"
(575.56mm)		0.20"
(5.08mm)		65th Driest
Driest since:
1934
63rd Wettest
Wettest since:
2019
Oct 2008–Jul 2009
10-Month		25.04"
(636.02mm)		24.83"
(630.68mm)		0.21"
(5.34mm)		64th Driest
Driest since:
1934
64th Wettest
Wettest since:
2019
Sep 2008–Jul 2009
11-Month		27.72"
(704.09mm)		27.33"
(694.18mm)		0.39"
(9.91mm)		64th Driest
Driest since:
1934
64th Wettest
Wettest since:
2019
Aug 2008–Jul 2009
12-Month		30.77"
(781.56mm)		29.95"
(760.73mm)		0.82"
(20.83mm)		76th Driest
Driest since:
1918
52nd Wettest
Wettest since:
2019
Feb 2008–Jul 2009
18-Month		47.10"
(1,196.34mm)		45.74"
(1,161.80mm)		1.36"
(34.54mm)		81st Driest
Driest since:
1931
47th Wettest
Wettest since:
2019
Aug 2007–Jul 2009
24-Month		61.17"
(1,553.72mm)		59.92"
(1,521.97mm)		1.25"
(31.75mm)		73rd Driest
Driest since:
1918
54th Wettest
Wettest since:
2020
Aug 2006–Jul 2009
36-Month		92.02"
(2,337.31mm)		89.88"
(2,282.95mm)		2.14"
(54.36mm)		82nd Driest
Driest since:
1956
44th Wettest
Wettest since:
2019
Aug 2005–Jul 2009
48-Month		120.12"
(3,051.05mm)		119.78"
(3,042.41mm)		0.34"
(8.64mm)		61st Driest
Driest since:
1956
64th Wettest
Wettest since:
2019
Aug 2004–Jul 2009
60-Month		152.81"
(3,881.37mm)		149.64"
(3,800.86mm)		3.17"
(80.51mm)		79th Driest
Driest since:
1934
45th Wettest
Wettest since:
2019

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