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, May 2013

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 2013
1-Month
3.35"
(85.09mm)
2.91"
(73.91mm)
0.44"
(11.18mm)
107th Driest
Driest since:
1934
22nd Wettest
Wettest since:
2019
Apr–May 2013
2-Month
6.25"
(158.75mm)
5.43"
(137.92mm)
0.82"
(20.83mm)
112th Driest
Driest since:
1934
17th Wettest
Wettest since:
1957
Mar–May 2013
3-Month
7.97"
(202.44mm)
7.94"
(201.68mm)
0.03"
(0.76mm)
68th Driest
Driest since:
1925
61st Wettest
Wettest since:
1957, 1991
Ties: 1999
Feb–May 2013
4-Month
9.99"
(253.75mm)
10.07"
(255.78mm)
-0.08"
(-2.03mm)
66th Driest
Driest since:
1925
63rd Wettest
Wettest since:
2019
Ties: 1986
Jan–May 2013
5-Month
12.36"
(313.94mm)
12.39"
(314.71mm)
-0.03"
(-0.77mm)
67th Driest
Driest since:
1934
62nd Wettest
Wettest since:
2019
Ties: 1964
Dec 2012–May 2013
6-Month
15.24"
(387.10mm)
14.73"
(374.14mm)
0.51"
(12.96mm)
78th Driest
Driest since:
1931
50th Wettest
Wettest since:
2019
Nov 2012–May 2013
7-Month
16.56"
(420.62mm)
16.96"
(430.78mm)
-0.40"
(-10.16mm)
54th Driest
Driest since:
1934
74th Wettest
Wettest since:
1983
Ties: 2007
Oct 2012–May 2013
8-Month
18.79"
(477.27mm)
19.13"
(485.90mm)
-0.34"
(-8.63mm)
53rd Driest
Driest since:
1934
75th Wettest
Wettest since:
2019
Sep 2012–May 2013
9-Month
21.13"
(536.70mm)
21.62"
(549.15mm)
-0.49"
(-12.45mm)
50th Driest
Driest since:
1934
78th Wettest
Wettest since:
2019
Aug 2012–May 2013
10-Month
23.60"
(599.44mm)
24.25"
(615.95mm)
-0.65"
(-16.51mm)
40th Driest
Driest since:
1918
88th Wettest
Wettest since:
2019
Jul 2012–May 2013
11-Month
26.11"
(663.19mm)
27.03"
(686.56mm)
-0.92"
(-23.37mm)
37th Driest
Driest since:
1931
91st Wettest
Wettest since:
2019
Jun 2012–May 2013
12-Month
28.35"
(720.09mm)
29.95"
(760.73mm)
-1.60"
(-40.64mm)
29th Driest
Driest since:
1934
99th Wettest
Wettest since:
2019
Dec 2011–May 2013
18-Month
42.15"
(1,070.61mm)
44.70"
(1,135.38mm)
-2.55"
(-64.77mm)
24th Driest
Driest since:
1931
103rd Wettest
Wettest since:
2019
Jun 2011–May 2013
24-Month
56.60"
(1,437.64mm)
59.92"
(1,521.97mm)
-3.32"
(-84.33mm)
23rd Driest
Driest since:
1931
104th Wettest
Wettest since:
2020
Jun 2010–May 2013
36-Month
88.73"
(2,253.74mm)
89.88"
(2,282.95mm)
-1.15"
(-29.21mm)
44th Driest
Driest since:
1955
82nd Wettest
Wettest since:
2019
Jun 2009–May 2013
48-Month
121.67"
(3,090.42mm)
119.78"
(3,042.41mm)
1.89"
(48.01mm)
78th Driest
Driest since:
1956
47th Wettest
Wettest since:
2019
Jun 2008–May 2013
60-Month
152.16"
(3,864.86mm)
149.64"
(3,800.86mm)
2.52"
(64.00mm)
77th Driest
Driest since:
1957
47th Wettest
Wettest since:
2020

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