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, October 1987

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
October 1987
1-Month
1.15"
(29.21mm)
2.16"
(54.86mm)
-1.01"
(-25.65mm)
5th Driest
Driest since:
1952
124th Wettest
Wettest since:
2009
Sep–Oct 1987
2-Month
3.34"
(84.84mm)
4.65"
(118.11mm)
-1.31"
(-33.27mm)
7th Driest
Driest since:
1952
122nd Wettest
Wettest since:
2018
Aug–Oct 1987
3-Month
6.08"
(154.43mm)
7.27"
(184.66mm)
-1.19"
(-30.23mm)
13th Driest
Driest since:
1952
116th Wettest
Wettest since:
2018
Jul–Oct 1987
4-Month
8.91"
(226.31mm)
10.05"
(255.27mm)
-1.14"
(-28.96mm)
17th Driest
Driest since:
1952
112th Wettest
Wettest since:
1941
Jun–Oct 1987
5-Month
11.72"
(297.69mm)
12.97"
(329.44mm)
-1.25"
(-31.75mm)
21st Driest
Driest since:
1952
108th Wettest
Wettest since:
1941
May–Oct 1987
6-Month
14.96"
(379.98mm)
15.88"
(403.35mm)
-0.92"
(-23.37mm)
30th Driest
Driest since:
1952
99th Wettest
Wettest since:
1941
Apr–Oct 1987
7-Month
16.42"
(417.07mm)
18.40"
(467.36mm)
-1.98"
(-50.29mm)
14th Driest
Driest since:
1952
115th Wettest
Wettest since:
1941
Ties: 1954
Mar–Oct 1987
8-Month
19.09"
(484.89mm)
20.91"
(531.11mm)
-1.82"
(-46.22mm)
17th Driest
Driest since:
1956
112th Wettest
Wettest since:
2019
Feb–Oct 1987
9-Month
21.42"
(544.07mm)
23.04"
(585.22mm)
-1.62"
(-41.15mm)
21st Driest
Driest since:
1934
108th Wettest
Wettest since:
2019
Jan–Oct 1987
10-Month
23.59"
(599.19mm)
25.36"
(644.14mm)
-1.77"
(-44.95mm)
21st Driest
Driest since:
1934
108th Wettest
Wettest since:
2019
Dec 1986–Oct 1987
11-Month
25.59"
(649.99mm)
27.70"
(703.58mm)
-2.11"
(-53.59mm)
20th Driest
Driest since:
1931
108th Wettest
Wettest since:
2019
Ties: 2012
Nov 1986–Oct 1987
12-Month
28.53"
(724.66mm)
29.93"
(760.22mm)
-1.40"
(-35.56mm)
28th Driest
Driest since:
1934
100th Wettest
Wettest since:
2019
May 1986–Oct 1987
18-Month
46.48"
(1,180.59mm)
45.83"
(1,164.08mm)
0.65"
(16.51mm)
68th Driest
Driest since:
1931
60th Wettest
Wettest since:
2019
Nov 1985–Oct 1987
24-Month
59.97"
(1,523.24mm)
59.90"
(1,521.46mm)
0.07"
(1.78mm)
58th Driest
Driest since:
1931
69th Wettest
Wettest since:
2019
Nov 1984–Oct 1987
36-Month
90.28"
(2,293.11mm)
89.86"
(2,282.44mm)
0.42"
(10.67mm)
67th Driest
Driest since:
1956
59th Wettest
Wettest since:
2019
Nov 1983–Oct 1987
48-Month
123.70"
(3,141.98mm)
119.78"
(3,042.41mm)
3.92"
(99.57mm)
97th Driest
Driest since:
1956
28th Wettest
Wettest since:
2019
Nov 1982–Oct 1987
60-Month
157.85"
(4,009.39mm)
149.66"
(3,801.36mm)
8.19"
(208.03mm)
108th Driest
Driest since:
1934
16th Wettest
Wettest since:
2019

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