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 1988

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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 1988
1-Month
2.70"
(68.58mm)
2.78"
(70.61mm)
-0.08"
(-2.03mm)
45th Driest
Driest since:
1930
84th Wettest
Wettest since:
1950, 1958
Ties: 1920, 1923, 1991, 2005
Jun–Jul 1988
2-Month
4.31"
(109.47mm)
5.70"
(144.78mm)
-1.39"
(-35.31mm)
5th Driest
Driest since:
1930
124th Wettest
Wettest since:
1928
May–Jul 1988
3-Month
6.38"
(162.05mm)
8.62"
(218.95mm)
-2.24"
(-56.90mm)
1st Driest
Driest since:
1988
128th Wettest
Wettest since:
2015
Apr–Jul 1988
4-Month
8.70"
(220.98mm)
11.13"
(282.70mm)
-2.43"
(-61.72mm)
3rd Driest
Driest since:
1934
126th Wettest
Wettest since:
2015
Mar–Jul 1988
5-Month
10.74"
(272.80mm)
13.64"
(346.46mm)
-2.90"
(-73.66mm)
3rd Driest
Driest since:
1936
126th Wettest
Wettest since:
1973
Ties: 1910
Feb–Jul 1988
6-Month
12.26"
(311.40mm)
15.78"
(400.81mm)
-3.52"
(-89.41mm)
2nd Driest
Driest since:
1934
127th Wettest
Wettest since:
2019
Jan–Jul 1988
7-Month
14.23"
(361.44mm)
18.09"
(459.49mm)
-3.86"
(-98.05mm)
2nd Driest
Driest since:
1934
127th Wettest
Wettest since:
2019
Dec 1987–Jul 1988
8-Month
17.10"
(434.34mm)
20.44"
(519.18mm)
-3.34"
(-84.84mm)
3rd Driest
Driest since:
1931
125th Wettest
Wettest since:
2019
Nov 1987–Jul 1988
9-Month
19.65"
(499.11mm)
22.66"
(575.56mm)
-3.01"
(-76.45mm)
8th Driest
Driest since:
1934
120th Wettest
Wettest since:
2019
Oct 1987–Jul 1988
10-Month
20.80"
(528.32mm)
24.83"
(630.68mm)
-4.03"
(-102.36mm)
5th Driest
Driest since:
1934
123rd Wettest
Wettest since:
2019
Sep 1987–Jul 1988
11-Month
22.99"
(583.95mm)
27.33"
(694.18mm)
-4.34"
(-110.23mm)
3rd Driest
Driest since:
1934
125th Wettest
Wettest since:
2019
Aug 1987–Jul 1988
12-Month
25.73"
(653.54mm)
29.95"
(760.73mm)
-4.22"
(-107.19mm)
6th Driest
Driest since:
1918
122nd Wettest
Wettest since:
2019
Feb 1987–Jul 1988
18-Month
41.07"
(1,043.18mm)
45.74"
(1,161.80mm)
-4.67"
(-118.62mm)
8th Driest
Driest since:
1931
120th Wettest
Wettest since:
2019
Aug 1986–Jul 1988
24-Month
57.40"
(1,457.96mm)
59.92"
(1,521.97mm)
-2.52"
(-64.01mm)
26th Driest
Driest since:
1918
101st Wettest
Wettest since:
2020
Aug 1985–Jul 1988
36-Month
88.73"
(2,253.74mm)
89.88"
(2,282.95mm)
-1.15"
(-29.21mm)
48th Driest
Driest since:
1956
78th Wettest
Wettest since:
2019
Aug 1984–Jul 1988
48-Month
117.92"
(2,995.17mm)
119.78"
(3,042.41mm)
-1.86"
(-47.24mm)
39th Driest
Driest since:
1956
86th Wettest
Wettest since:
2019
Aug 1983–Jul 1988
60-Month
150.59"
(3,824.99mm)
149.64"
(3,800.86mm)
0.95"
(24.13mm)
66th Driest
Driest since:
1934
58th Wettest
Wettest since:
2019

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