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 2019

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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
July 2019
1-Month 		2.76"
(70.10mm)		 2.78"
(70.61mm)		 -0.02"
(-0.51mm)		 58th Driest
Driest since:
 1930
71st Wettest
Wettest since:
 1950, 1958
Jun–Jul 2019
2-Month 		6.13"
(155.70mm)		 5.70"
(144.78mm)		 0.43"
(10.92mm)		 99th Driest
Driest since:
 1930
30th Wettest
Wettest since:
 1928
May–Jul 2019
3-Month 		10.60"
(269.24mm)		 8.62"
(218.95mm)		 1.98"
(50.29mm)		 126th Driest
Driest since:
 1988
3rd Wettest
Wettest since:
 2015
Apr–Jul 2019
4-Month 		13.81"
(350.77mm)		 11.13"
(282.70mm)		 2.68"
(68.07mm)		 126th Driest
Driest since:
 1934
3rd Wettest
Wettest since:
 2015
Mar–Jul 2019
5-Month 		16.05"
(407.67mm)		 13.64"
(346.46mm)		 2.41"
(61.21mm)		 124th Driest
Driest since:
 1936
5th Wettest
Wettest since:
 1973
Feb–Jul 2019
6-Month 		19.33"
(490.98mm)		 15.78"
(400.81mm)		 3.55"
(90.17mm)		 128th Driest
Driest since:
 1934
1st Wettest
Wettest to Date
 2019
Jan–Jul 2019
7-Month 		21.89"
(556.01mm)		 18.09"
(459.49mm)		 3.80"
(96.52mm)		 128th Driest
Driest since:
 1934
1st Wettest
Wettest to Date
 2019
Dec 2018–Jul 2019
8-Month 		25.14"
(638.56mm)		 20.43"
(518.92mm)		 4.71"
(119.64mm)		 127th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
Nov 2018–Jul 2019
9-Month 		27.85"
(707.39mm)		 22.66"
(575.56mm)		 5.19"
(131.83mm)		 127th Driest
Driest since:
 1934
1st Wettest
Wettest to Date
 2019
Oct 2018–Jul 2019
10-Month 		31.28"
(794.51mm)		 24.83"
(630.68mm)		 6.45"
(163.83mm)		 127th Driest
Driest since:
 1934
1st Wettest
Wettest to Date
 2019
Sep 2018–Jul 2019
11-Month 		34.85"
(885.19mm)		 27.33"
(694.18mm)		 7.52"
(191.01mm)		 127th Driest
Driest since:
 1934
1st Wettest
Wettest to Date
 2019
Aug 2018–Jul 2019
12-Month 		37.83"
(960.88mm)		 29.95"
(760.73mm)		 7.88"
(200.15mm)		 127th Driest
Driest since:
 1918
1st Wettest
Wettest to Date
 2019
Feb 2018–Jul 2019
18-Month 		54.69"
(1,389.13mm)		 45.74"
(1,161.80mm)		 8.95"
(227.33mm)		 127th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
Aug 2017–Jul 2019
24-Month 		68.04"
(1,728.22mm)		 59.92"
(1,521.97mm)		 8.12"
(206.25mm)		 125th Driest
Driest since:
 1918
2nd Wettest
Wettest to Date
 2020
Aug 2016–Jul 2019
36-Month 		101.91"
(2,588.51mm)		 89.88"
(2,282.95mm)		 12.03"
(305.56mm)		 125th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2019
Aug 2015–Jul 2019
48-Month 		135.11"
(3,431.79mm)		 119.78"
(3,042.41mm)		 15.33"
(389.38mm)		 124th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2019
Aug 2014–Jul 2019
60-Month 		167.76"
(4,261.10mm)		 149.64"
(3,800.86mm)		 18.12"
(460.24mm)		 123rd Driest
Driest since:
 1934
1st Wettest
Wettest to Date
 2019

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