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 2009

View Period (Months):
Download: csv json xml
  • Record Driest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 2009
1-Month
2.83"
(71.88mm)
2.52"
(64.01mm)
0.31"
(7.87mm)
95th Driest
Driest since:
1987
34th Wettest
Wettest since:
1957
Ties: 1995, 2015
Mar–Apr 2009
2-Month
5.53"
(140.46mm)
5.03"
(127.76mm)
0.50"
(12.70mm)
99th Driest
Driest since:
1910
30th Wettest
Wettest since:
1973
Feb–Apr 2009
3-Month
7.08"
(179.83mm)
7.16"
(181.86mm)
-0.08"
(-2.03mm)
73rd Driest
Driest since:
1910
56th Wettest
Wettest since:
1983
Ties: 1921
Jan–Apr 2009
4-Month
8.68"
(220.47mm)
9.48"
(240.79mm)
-0.80"
(-20.32mm)
27th Driest
Driest since:
1910
102nd Wettest
Wettest since:
1998
Ties: 2021
Dec 2008–Apr 2009
5-Month
11.52"
(292.61mm)
11.82"
(300.23mm)
-0.30"
(-7.62mm)
54th Driest
Driest since:
1931
74th Wettest
Wettest since:
1983
Nov 2008–Apr 2009
6-Month
13.47"
(342.14mm)
14.05"
(356.87mm)
-0.58"
(-14.73mm)
46th Driest
Driest since:
1977
82nd Wettest
Wettest since:
1983
Ties: 1899
Oct 2008–Apr 2009
7-Month
15.65"
(397.51mm)
16.22"
(411.99mm)
-0.57"
(-14.48mm)
46th Driest
Driest since:
1981
82nd Wettest
Wettest since:
1983
Sep 2008–Apr 2009
8-Month
18.33"
(465.58mm)
18.71"
(475.23mm)
-0.38"
(-9.65mm)
52nd Driest
Driest since:
1918
76th Wettest
Wettest since:
2019
Ties: 2014
Aug 2008–Apr 2009
9-Month
21.38"
(543.05mm)
21.33"
(541.78mm)
0.05"
(1.27mm)
65th Driest
Driest since:
1918
63rd Wettest
Wettest since:
2019
Jul 2008–Apr 2009
10-Month
24.18"
(614.17mm)
24.12"
(612.65mm)
0.06"
(1.52mm)
64th Driest
Driest since:
1931
64th Wettest
Wettest since:
2019
Jun 2008–Apr 2009
11-Month
27.18"
(690.37mm)
27.04"
(686.82mm)
0.14"
(3.55mm)
62nd Driest
Driest since:
1931
66th Wettest
Wettest since:
2019
May 2008–Apr 2009
12-Month
30.18"
(766.57mm)
29.95"
(760.73mm)
0.23"
(5.84mm)
61st Driest
Driest since:
1918
67th Wettest
Wettest since:
2019
Nov 2007–Apr 2009
18-Month
44.29"
(1,124.97mm)
44.02"
(1,118.11mm)
0.27"
(6.86mm)
64th Driest
Driest since:
1931
63rd Wettest
Wettest since:
2020
May 2007–Apr 2009
24-Month
60.32"
(1,532.13mm)
59.92"
(1,521.97mm)
0.40"
(10.16mm)
68th Driest
Driest since:
1955
59th Wettest
Wettest since:
2020
May 2006–Apr 2009
36-Month
89.94"
(2,284.48mm)
89.88"
(2,282.95mm)
0.06"
(1.53mm)
67th Driest
Driest since:
1955
59th Wettest
Wettest since:
2020
May 2005–Apr 2009
48-Month
119.33"
(3,030.98mm)
119.77"
(3,042.16mm)
-0.44"
(-11.18mm)
55th Driest
Driest since:
1956
70th Wettest
Wettest since:
2019
May 2004–Apr 2009
60-Month
153.32"
(3,894.33mm)
149.63"
(3,800.60mm)
3.69"
(93.73mm)
84th Driest
Driest since:
1957
40th Wettest
Wettest since:
2020

Citing This Page