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, July 2015

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
July 2015
1-Month
3.23"
(82.04mm)
2.78"
(70.61mm)
0.45"
(11.43mm)
116th Driest
Driest since:
1930
13th Wettest
Wettest since:
1950, 1958
Jun–Jul 2015
2-Month
6.78"
(172.21mm)
5.70"
(144.78mm)
1.08"
(27.43mm)
121st Driest
Driest since:
1930
8th Wettest
Wettest since:
1928
May–Jul 2015
3-Month
11.22"
(284.99mm)
8.62"
(218.95mm)
2.60"
(66.04mm)
128th Driest
Driest since:
1988
1st Wettest
Wettest to Date
2015
Apr–Jul 2015
4-Month
14.05"
(356.87mm)
11.13"
(282.70mm)
2.92"
(74.17mm)
128th Driest
Driest since:
1934
1st Wettest
Wettest to Date
2015
Mar–Jul 2015
5-Month
16.18"
(410.97mm)
13.64"
(346.46mm)
2.54"
(64.51mm)
125th Driest
Driest since:
1936
4th Wettest
Wettest since:
1973
Feb–Jul 2015
6-Month
17.92"
(455.17mm)
15.78"
(400.81mm)
2.14"
(54.36mm)
120th Driest
Driest since:
1934
9th Wettest
Wettest since:
2019
Ties: 1998
Jan–Jul 2015
7-Month
19.75"
(501.65mm)
18.09"
(459.49mm)
1.66"
(42.16mm)
110th Driest
Driest since:
1934
19th Wettest
Wettest since:
2019
Dec 2014–Jul 2015
8-Month
22.33"
(567.18mm)
20.44"
(519.18mm)
1.89"
(48.00mm)
108th Driest
Driest since:
1931
20th Wettest
Wettest since:
2019
Nov 2014–Jul 2015
9-Month
24.46"
(621.28mm)
22.66"
(575.56mm)
1.80"
(45.72mm)
107th Driest
Driest since:
1934
21st Wettest
Wettest since:
2019
Oct 2014–Jul 2015
10-Month
26.88"
(682.75mm)
24.83"
(630.68mm)
2.05"
(52.07mm)
106th Driest
Driest since:
1934
22nd Wettest
Wettest since:
2019
Sep 2014–Jul 2015
11-Month
29.52"
(749.81mm)
27.33"
(694.18mm)
2.19"
(55.63mm)
107th Driest
Driest since:
1934
21st Wettest
Wettest since:
2019
Aug 2014–Jul 2015
12-Month
32.65"
(829.31mm)
29.95"
(760.73mm)
2.70"
(68.58mm)
110th Driest
Driest since:
1918
18th Wettest
Wettest since:
2019
Feb 2014–Jul 2015
18-Month
49.23"
(1,250.44mm)
45.74"
(1,161.80mm)
3.49"
(88.64mm)
109th Driest
Driest since:
1931
19th Wettest
Wettest since:
2019
Aug 2013–Jul 2015
24-Month
62.62"
(1,590.55mm)
59.92"
(1,521.97mm)
2.70"
(68.58mm)
94th Driest
Driest since:
1918
33rd Wettest
Wettest since:
2020
Aug 2012–Jul 2015
36-Month
92.90"
(2,359.66mm)
89.88"
(2,282.95mm)
3.02"
(76.71mm)
92nd Driest
Driest since:
1956
34th Wettest
Wettest since:
2019
Aug 2011–Jul 2015
48-Month
120.88"
(3,070.35mm)
119.78"
(3,042.41mm)
1.10"
(27.94mm)
65th Driest
Driest since:
1956
60th Wettest
Wettest since:
2019
Aug 2010–Jul 2015
60-Month
151.22"
(3,840.99mm)
149.64"
(3,800.86mm)
1.58"
(40.13mm)
71st Driest
Driest since:
1934
53rd Wettest
Wettest since:
2019

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