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 1991

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
July 1991
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, 1988, 2005
Jun–Jul 1991
2-Month
5.54"
(140.72mm)
5.70"
(144.78mm)
-0.16"
(-4.06mm)
44th Driest
Driest since:
1930
85th Wettest
Wettest since:
1928
May–Jul 1991
3-Month
9.26"
(235.20mm)
8.62"
(218.95mm)
0.64"
(16.25mm)
95th Driest
Driest since:
1988
34th Wettest
Wettest since:
2015
Ties: 1949
Apr–Jul 1991
4-Month
12.61"
(320.29mm)
11.13"
(282.70mm)
1.48"
(37.59mm)
117th Driest
Driest since:
1934
12th Wettest
Wettest since:
2015
Ties: 1928
Mar–Jul 1991
5-Month
15.94"
(404.88mm)
13.64"
(346.46mm)
2.30"
(58.42mm)
123rd Driest
Driest since:
1936
6th Wettest
Wettest since:
1973
Feb–Jul 1991
6-Month
17.58"
(446.53mm)
15.78"
(400.81mm)
1.80"
(45.72mm)
114th Driest
Driest since:
1934
15th Wettest
Wettest since:
2019
Jan–Jul 1991
7-Month
19.95"
(506.73mm)
18.09"
(459.49mm)
1.86"
(47.24mm)
114th Driest
Driest since:
1934
15th Wettest
Wettest since:
2019
Ties: 1958
Dec 1990–Jul 1991
8-Month
22.64"
(575.06mm)
20.44"
(519.18mm)
2.20"
(55.88mm)
116th Driest
Driest since:
1931
12th Wettest
Wettest since:
2019
Ties: 1938
Nov 1990–Jul 1991
9-Month
24.73"
(628.14mm)
22.66"
(575.56mm)
2.07"
(52.58mm)
110th Driest
Driest since:
1934
18th Wettest
Wettest since:
2019
Oct 1990–Jul 1991
10-Month
27.49"
(698.25mm)
24.83"
(630.68mm)
2.66"
(67.57mm)
115th Driest
Driest since:
1934
13th Wettest
Wettest since:
2019
Sep 1990–Jul 1991
11-Month
29.53"
(750.06mm)
27.33"
(694.18mm)
2.20"
(55.88mm)
109th Driest
Driest since:
1934
19th Wettest
Wettest since:
2019
Ties: 1979
Aug 1990–Jul 1991
12-Month
32.18"
(817.37mm)
29.95"
(760.73mm)
2.23"
(56.64mm)
105th Driest
Driest since:
1918
23rd Wettest
Wettest since:
2019
Feb 1990–Jul 1991
18-Month
49.33"
(1,252.98mm)
45.74"
(1,161.80mm)
3.59"
(91.18mm)
110th Driest
Driest since:
1931
18th Wettest
Wettest since:
2019
Aug 1989–Jul 1991
24-Month
62.49"
(1,587.25mm)
59.92"
(1,521.97mm)
2.57"
(65.28mm)
92nd Driest
Driest since:
1918
35th Wettest
Wettest since:
2020
Aug 1988–Jul 1991
36-Month
92.84"
(2,358.14mm)
89.88"
(2,282.95mm)
2.96"
(75.19mm)
89th Driest
Driest since:
1956
37th Wettest
Wettest since:
2019
Aug 1987–Jul 1991
48-Month
118.57"
(3,011.68mm)
119.78"
(3,042.41mm)
-1.21"
(-30.73mm)
47th Driest
Driest since:
1956
78th Wettest
Wettest since:
2019
Ties: 2014
Aug 1986–Jul 1991
60-Month
150.24"
(3,816.10mm)
149.64"
(3,800.86mm)
0.60"
(15.24mm)
63rd Driest
Driest since:
1934
61st Wettest
Wettest since:
2019

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