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 1901

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Wettest/Driest
Since		Record
April 1901
1-Month		2.53"
(64.26mm)		2.52"
(64.01mm)		0.01"
(0.25mm)		67th Driest
Driest since:
1987
63rd Wettest
Wettest since:
1957
Mar–Apr 1901
2-Month		4.82"
(122.43mm)		5.03"
(127.76mm)		-0.21"
(-5.33mm)		55th Driest
Driest since:
1910
75th Wettest
Wettest since:
1973
Feb–Apr 1901
3-Month		6.95"
(176.53mm)		7.16"
(181.86mm)		-0.21"
(-5.33mm)		60th Driest
Driest since:
1910
70th Wettest
Wettest since:
1983
Ties: 1933, 2012
Jan–Apr 1901
4-Month		8.94"
(227.08mm)		9.48"
(240.79mm)		-0.54"
(-13.71mm)		44th Driest
Driest since:
1910
86th Wettest
Wettest since:
1998
Dec 1900–Apr 1901
5-Month		10.60"
(269.24mm)		11.82"
(300.23mm)		-1.22"
(-30.99mm)		19th Driest
Driest to Date
1931
110th Wettest
Wettest since:
1983
Nov 1900–Apr 1901
6-Month		12.97"
(329.44mm)		14.05"
(356.87mm)		-1.08"
(-27.43mm)		29th Driest
Driest to Date
1977
100th Wettest
Wettest since:
1983
Oct 1900–Apr 1901
7-Month		15.72"
(399.29mm)		16.22"
(411.99mm)		-0.50"
(-12.70mm)		50th Driest
Driest since:
1981
79th Wettest
Wettest since:
1983
Sep 1900–Apr 1901
8-Month		18.65"
(473.71mm)		18.71"
(475.23mm)		-0.06"
(-1.52mm)		63rd Driest
Driest since:
1918
66th Wettest
Wettest since:
2019
Aug 1900–Apr 1901
9-Month		21.07"
(535.18mm)		21.33"
(541.78mm)		-0.26"
(-6.60mm)		50th Driest
Driest since:
1918
79th Wettest
Wettest since:
2019
Ties: 1971, 2004
Jul 1900–Apr 1901
10-Month		24.14"
(613.16mm)		24.12"
(612.65mm)		0.02"
(0.51mm)		61st Driest
Driest since:
1931
68th Wettest
Wettest since:
2019
Jun 1900–Apr 1901
11-Month		27.17"
(690.12mm)		27.04"
(686.82mm)		0.13"
(3.30mm)		61st Driest
Driest since:
1931
68th Wettest
Wettest since:
2019
May 1900–Apr 1901
12-Month		29.62"
(752.35mm)		29.95"
(760.73mm)		-0.33"
(-8.38mm)		50th Driest
Driest since:
1918
79th Wettest
Wettest since:
2019
Ties: 2007
Nov 1899–Apr 1901
18-Month		43.92"
(1,115.57mm)		44.02"
(1,118.11mm)		-0.10"
(-2.54mm)		58th Driest
Driest since:
1931
70th Wettest
Wettest since:
2020
May 1899–Apr 1901
24-Month		58.79"
(1,493.27mm)		59.92"
(1,521.97mm)		-1.13"
(-28.70mm)		44th Driest
Driest since:
1955
84th Wettest
Wettest since:
2020
May 1898–Apr 1901
36-Month		89.33"
(2,268.98mm)		89.88"
(2,282.95mm)		-0.55"
(-13.97mm)		59th Driest
Driest since:
1955
68th Wettest
Wettest to Date
2020
May 1897–Apr 1901
48-Month		116.33"
(2,954.78mm)		119.77"
(3,042.16mm)		-3.44"
(-87.38mm)		28th Driest
Driest to Date
1956
98th Wettest
Wettest since:
2019
May 1896–Apr 1901
60-Month		147.87"
(3,755.90mm)		149.63"
(3,800.60mm)		-1.76"
(-44.70mm)		47th Driest
Driest since:
1957
78th Wettest
Wettest to Date
2020

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