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, August 2019

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
August 2019
1-Month		2.78"
(70.61mm)		2.62"
(66.55mm)		0.16"
(4.06mm)		88th Driest
Driest since:
1929
41st Wettest
Wettest since:
1977
Ties: 1941
Jul–Aug 2019
2-Month		5.54"
(140.72mm)		5.40"
(137.16mm)		0.14"
(3.56mm)		71st Driest
Driest since:
1930
58th Wettest
Wettest since:
1915
Jun–Aug 2019
3-Month		8.91"
(226.31mm)		8.32"
(211.33mm)		0.59"
(14.98mm)		101st Driest
Driest since:
1930
28th Wettest
Wettest since:
1928
Ties: 1908
May–Aug 2019
4-Month		13.38"
(339.85mm)		11.23"
(285.24mm)		2.15"
(54.61mm)		126th Driest
Driest since:
1936
3rd Wettest
Wettest since:
1915
Apr–Aug 2019
5-Month		16.59"
(421.39mm)		13.75"
(349.25mm)		2.84"
(72.14mm)		128th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019
Mar–Aug 2019
6-Month		18.83"
(478.28mm)		16.26"
(413.00mm)		2.57"
(65.28mm)		127th Driest
Driest since:
1936
2nd Wettest
Wettest since:
1905
Feb–Aug 2019
7-Month		22.11"
(561.59mm)		18.40"
(467.36mm)		3.71"
(94.23mm)		128th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019
Jan–Aug 2019
8-Month		24.67"
(626.62mm)		20.71"
(526.03mm)		3.96"
(100.59mm)		128th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019
Dec 2018–Aug 2019
9-Month		27.92"
(709.17mm)		23.05"
(585.47mm)		4.87"
(123.70mm)		127th Driest
Driest since:
1931
1st Wettest
Wettest to Date
2019
Nov 2018–Aug 2019
10-Month		30.63"
(778.00mm)		25.28"
(642.11mm)		5.35"
(135.89mm)		127th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019
Oct 2018–Aug 2019
11-Month		34.06"
(865.12mm)		27.45"
(697.23mm)		6.61"
(167.89mm)		127th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019
Sep 2018–Aug 2019
12-Month		37.63"
(955.80mm)		29.94"
(760.48mm)		7.69"
(195.32mm)		127th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019
Mar 2018–Aug 2019
18-Month		54.58"
(1,386.33mm)		46.22"
(1,173.99mm)		8.36"
(212.34mm)		127th Driest
Driest since:
1931
1st Wettest
Wettest to Date
2019
Sep 2017–Aug 2019
24-Month		67.40"
(1,711.96mm)		59.92"
(1,521.97mm)		7.48"
(189.99mm)		122nd Driest
Driest since:
1918
5th Wettest
Wettest since:
2020
Sep 2016–Aug 2019
36-Month		101.22"
(2,570.99mm)		89.86"
(2,282.44mm)		11.36"
(288.55mm)		125th Driest
Driest since:
1956
1st Wettest
Wettest to Date
2019
Sep 2015–Aug 2019
48-Month		135.48"
(3,441.19mm)		119.77"
(3,042.16mm)		15.71"
(399.03mm)		124th Driest
Driest since:
1956
1st Wettest
Wettest to Date
2019
Sep 2014–Aug 2019
60-Month		167.41"
(4,252.21mm)		149.64"
(3,800.86mm)		17.77"
(451.35mm)		123rd Driest
Driest since:
1934
1st Wettest
Wettest to Date
2019

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