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 2004

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 2004
1-Month
2.50"
(63.50mm)
2.52"
(64.01mm)
-0.02"
(-0.51mm)
62nd Driest
Driest since:
1987
67th Wettest
Wettest since:
1957
Mar–Apr 2004
2-Month
4.51"
(114.55mm)
5.03"
(127.76mm)
-0.52"
(-13.21mm)
31st Driest
Driest since:
1910
98th Wettest
Wettest since:
1973
Feb–Apr 2004
3-Month
6.96"
(176.78mm)
7.16"
(181.86mm)
-0.20"
(-5.08mm)
63rd Driest
Driest since:
1910
66th Wettest
Wettest since:
1983
Ties: 1949
Jan–Apr 2004
4-Month
8.93"
(226.82mm)
9.47"
(240.54mm)
-0.54"
(-13.72mm)
42nd Driest
Driest since:
1910
87th Wettest
Wettest since:
1998
Ties: 1946
Dec 2003–Apr 2004
5-Month
11.31"
(287.27mm)
11.82"
(300.23mm)
-0.51"
(-12.96mm)
42nd Driest
Driest since:
1931
86th Wettest
Wettest since:
1983
Nov 2003–Apr 2004
6-Month
13.86"
(352.04mm)
14.05"
(356.87mm)
-0.19"
(-4.83mm)
67th Driest
Driest since:
1977
61st Wettest
Wettest since:
1983
Ties: 1928
Oct 2003–Apr 2004
7-Month
15.69"
(398.53mm)
16.22"
(411.99mm)
-0.53"
(-13.46mm)
48th Driest
Driest since:
1981
80th Wettest
Wettest since:
1983
Sep 2003–Apr 2004
8-Month
18.51"
(470.15mm)
18.71"
(475.23mm)
-0.20"
(-5.08mm)
59th Driest
Driest since:
1918
69th Wettest
Wettest since:
2019
Aug 2003–Apr 2004
9-Month
21.07"
(535.18mm)
21.33"
(541.78mm)
-0.26"
(-6.60mm)
50th Driest
Driest since:
1918
78th Wettest
Wettest since:
2019
Ties: 1901, 1971
Jul 2003–Apr 2004
10-Month
23.71"
(602.23mm)
24.12"
(612.65mm)
-0.41"
(-10.42mm)
49th Driest
Driest since:
1931
79th Wettest
Wettest since:
2019
Jun 2003–Apr 2004
11-Month
27.16"
(689.86mm)
27.04"
(686.82mm)
0.12"
(3.04mm)
60th Driest
Driest since:
1931
68th Wettest
Wettest since:
2019
May 2003–Apr 2004
12-Month
30.43"
(772.92mm)
29.95"
(760.73mm)
0.48"
(12.19mm)
71st Driest
Driest since:
1918
57th Wettest
Wettest since:
2019
Ties: 1924
Nov 2002–Apr 2004
18-Month
44.38"
(1,127.25mm)
44.02"
(1,118.11mm)
0.36"
(9.14mm)
67th Driest
Driest since:
1931
60th Wettest
Wettest since:
2020
May 2002–Apr 2004
24-Month
60.31"
(1,531.87mm)
59.92"
(1,521.97mm)
0.39"
(9.90mm)
67th Driest
Driest since:
1955
60th Wettest
Wettest since:
2020
May 2001–Apr 2004
36-Month
88.78"
(2,255.01mm)
89.88"
(2,282.95mm)
-1.10"
(-27.94mm)
47th Driest
Driest since:
1955
79th Wettest
Wettest since:
2020
Ties: 1942
May 2000–Apr 2004
48-Month
116.71"
(2,964.43mm)
119.77"
(3,042.16mm)
-3.06"
(-77.73mm)
35th Driest
Driest since:
1956
90th Wettest
Wettest since:
2019
May 1999–Apr 2004
60-Month
144.09"
(3,659.89mm)
149.63"
(3,800.60mm)
-5.54"
(-140.71mm)
18th Driest
Driest since:
1957
106th Wettest
Wettest since:
2020

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