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, June 2018

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
June 2018
1-Month
3.15"
(80.01mm)
2.93"
(74.42mm)
0.22"
(5.59mm)
88th Driest
Driest since:
1933
41st Wettest
Wettest since:
1928
May–Jun 2018
2-Month
6.17"
(156.72mm)
5.84"
(148.34mm)
0.33"
(8.38mm)
85th Driest
Driest since:
1988
44th Wettest
Wettest since:
2015
Ties: 1919
Apr–Jun 2018
3-Month
8.63"
(219.20mm)
8.35"
(212.09mm)
0.28"
(7.11mm)
77th Driest
Driest since:
1988
52nd Wettest
Wettest since:
1957
Mar–Jun 2018
4-Month
11.11"
(282.19mm)
10.86"
(275.84mm)
0.25"
(6.35mm)
72nd Driest
Driest since:
1988
57th Wettest
Wettest since:
1957
Feb–Jun 2018
5-Month
14.00"
(355.60mm)
13.00"
(330.20mm)
1.00"
(25.40mm)
102nd Driest
Driest since:
1988
27th Wettest
Wettest since:
2019
Ties: 1997
Jan–Jun 2018
6-Month
15.85"
(402.59mm)
15.31"
(388.87mm)
0.54"
(13.72mm)
86th Driest
Driest since:
1988
43rd Wettest
Wettest since:
2019
Dec 2017–Jun 2018
7-Month
17.44"
(442.98mm)
17.66"
(448.56mm)
-0.22"
(-5.58mm)
53rd Driest
Driest since:
1931
75th Wettest
Wettest since:
2019
Nov 2017–Jun 2018
8-Month
19.06"
(484.12mm)
19.89"
(505.21mm)
-0.83"
(-21.09mm)
39th Driest
Driest since:
1934
89th Wettest
Wettest since:
2019
Oct 2017–Jun 2018
9-Month
21.66"
(550.16mm)
22.05"
(560.07mm)
-0.39"
(-9.91mm)
45th Driest
Driest since:
1934
83rd Wettest
Wettest since:
2019
Sep 2017–Jun 2018
10-Month
23.93"
(607.82mm)
24.55"
(623.57mm)
-0.62"
(-15.75mm)
45th Driest
Driest since:
1934
83rd Wettest
Wettest since:
2019
Aug 2017–Jun 2018
11-Month
27.35"
(694.69mm)
27.17"
(690.12mm)
0.18"
(4.57mm)
59th Driest
Driest since:
1918
69th Wettest
Wettest since:
2019
Ties: 1937
Jul 2017–Jun 2018
12-Month
30.15"
(765.81mm)
29.96"
(760.98mm)
0.19"
(4.83mm)
60th Driest
Driest since:
1931
68th Wettest
Wettest since:
2019
Jan 2017–Jun 2018
18-Month
48.16"
(1,223.26mm)
45.27"
(1,149.86mm)
2.89"
(73.40mm)
102nd Driest
Driest since:
1931
26th Wettest
Wettest since:
2019
Jul 2016–Jun 2018
24-Month
64.14"
(1,629.16mm)
59.93"
(1,522.22mm)
4.21"
(106.94mm)
109th Driest
Driest since:
1931
18th Wettest
Wettest since:
2020
Jul 2015–Jun 2018
36-Month
97.65"
(2,480.31mm)
89.89"
(2,283.21mm)
7.76"
(197.10mm)
114th Driest
Driest since:
1956
12th Wettest
Wettest since:
2019
Jul 2014–Jun 2018
48-Month
129.67"
(3,293.62mm)
119.79"
(3,042.67mm)
9.88"
(250.95mm)
117th Driest
Driest since:
1956
8th Wettest
Wettest since:
2019
Jul 2013–Jun 2018
60-Month
160.38"
(4,073.65mm)
149.66"
(3,801.36mm)
10.72"
(272.29mm)
115th Driest
Driest since:
1934
9th Wettest
Wettest since:
2020

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