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 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
April 2019
1-Month 		3.21"
(81.53mm)		 2.52"
(64.01mm)		 0.69"
(17.52mm)		 118th Driest
Driest since:
 1987
11th Wettest
Wettest since:
 1957
Mar–Apr 2019
2-Month 		5.45"
(138.43mm)		 5.03"
(127.76mm)		 0.42"
(10.67mm)		 95th Driest
Driest since:
 1910
34th Wettest
Wettest since:
 1973
Feb–Apr 2019
3-Month 		8.73"
(221.74mm)		 7.16"
(181.86mm)		 1.57"
(39.88mm)		 121st Driest
Driest since:
 1910
8th Wettest
Wettest since:
 1983
Jan–Apr 2019
4-Month 		11.29"
(286.77mm)		 9.47"
(240.54mm)		 1.82"
(46.23mm)		 123rd Driest
Driest since:
 1910
6th Wettest
Wettest since:
 1998
Ties: 1975
Dec 2018–Apr 2019
5-Month 		14.54"
(369.32mm)		 11.82"
(300.23mm)		 2.72"
(69.09mm)		 124th Driest
Driest since:
 1931
4th Wettest
Wettest since:
 1983
Nov 2018–Apr 2019
6-Month 		17.25"
(438.15mm)		 14.05"
(356.87mm)		 3.20"
(81.28mm)		 124th Driest
Driest since:
 1977
4th Wettest
Wettest since:
 1983
Oct 2018–Apr 2019
7-Month 		20.68"
(525.27mm)		 16.22"
(411.99mm)		 4.46"
(113.28mm)		 126th Driest
Driest since:
 1981
2nd Wettest
Wettest since:
 1983
Sep 2018–Apr 2019
8-Month 		24.25"
(615.95mm)		 18.71"
(475.23mm)		 5.54"
(140.72mm)		 127th Driest
Driest since:
 1918
1st Wettest
Wettest to Date
 2019
Aug 2018–Apr 2019
9-Month 		27.23"
(691.64mm)		 21.33"
(541.78mm)		 5.90"
(149.86mm)		 127th Driest
Driest since:
 1918
1st Wettest
Wettest to Date
 2019
Jul 2018–Apr 2019
10-Month 		30.09"
(764.29mm)		 24.12"
(612.65mm)		 5.97"
(151.64mm)		 127th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
Jun 2018–Apr 2019
11-Month 		33.24"
(844.30mm)		 27.04"
(686.82mm)		 6.20"
(157.48mm)		 127th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
May 2018–Apr 2019
12-Month 		36.26"
(921.00mm)		 29.95"
(760.73mm)		 6.31"
(160.27mm)		 127th Driest
Driest since:
 1918
1st Wettest
Wettest to Date
 2019
Nov 2017–Apr 2019
18-Month 		49.15"
(1,248.41mm)		 44.02"
(1,118.11mm)		 5.13"
(130.30mm)		 119th Driest
Driest since:
 1931
8th Wettest
Wettest since:
 2020
May 2017–Apr 2019
24-Month 		66.67"
(1,693.42mm)		 59.92"
(1,521.97mm)		 6.75"
(171.45mm)		 120th Driest
Driest since:
 1955
7th Wettest
Wettest since:
 2020
May 2016–Apr 2019
36-Month 		99.78"
(2,534.41mm)		 89.88"
(2,282.95mm)		 9.90"
(251.46mm)		 120th Driest
Driest since:
 1955
6th Wettest
Wettest since:
 2020
May 2015–Apr 2019
48-Month 		135.73"
(3,447.54mm)		 119.77"
(3,042.16mm)		 15.96"
(405.38mm)		 124th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2019
May 2014–Apr 2019
60-Month 		166.24"
(4,222.50mm)		 149.63"
(3,800.60mm)		 16.61"
(421.90mm)		 122nd Driest
Driest since:
 1957
2nd Wettest
Wettest to Date
 2020

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