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 2017

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 2017
1-Month
2.60"
(66.04mm)
2.16"
(54.86mm)
0.44"
(11.18mm)
96th Driest
Driest since:
1952
33rd Wettest
Wettest since:
2009
Ties: 1929
Sep–Oct 2017
2-Month
4.87"
(123.70mm)
4.65"
(118.11mm)
0.22"
(5.59mm)
80th Driest
Driest since:
1952
49th Wettest
Wettest since:
2018
Ties: 1951, 1983
Aug–Oct 2017
3-Month
8.29"
(210.57mm)
7.27"
(184.66mm)
1.02"
(25.91mm)
110th Driest
Driest since:
1952
19th Wettest
Wettest since:
2018
Jul–Oct 2017
4-Month
11.09"
(281.69mm)
10.05"
(255.27mm)
1.04"
(26.42mm)
108th Driest
Driest since:
1952
21st Wettest
Wettest since:
1941
Ties: 1945
Jun–Oct 2017
5-Month
14.16"
(359.66mm)
12.97"
(329.44mm)
1.19"
(30.22mm)
105th Driest
Driest since:
1952
24th Wettest
Wettest since:
1941
Ties: 1972
May–Oct 2017
6-Month
17.52"
(445.01mm)
15.88"
(403.35mm)
1.64"
(41.66mm)
112th Driest
Driest since:
1952
17th Wettest
Wettest since:
1941
Apr–Oct 2017
7-Month
21.02"
(533.91mm)
18.40"
(467.36mm)
2.62"
(66.55mm)
121st Driest
Driest since:
1952
8th Wettest
Wettest since:
1941
Mar–Oct 2017
8-Month
23.61"
(599.69mm)
20.91"
(531.11mm)
2.70"
(68.58mm)
122nd Driest
Driest since:
1956
7th Wettest
Wettest since:
2019
Ties: 2015
Feb–Oct 2017
9-Month
25.86"
(656.84mm)
23.04"
(585.22mm)
2.82"
(71.62mm)
118th Driest
Driest since:
1934
11th Wettest
Wettest since:
2019
Jan–Oct 2017
10-Month
29.10"
(739.14mm)
25.36"
(644.14mm)
3.74"
(95.00mm)
126th Driest
Driest since:
1934
3rd Wettest
Wettest since:
2019
Dec 2016–Oct 2017
11-Month
31.82"
(808.23mm)
27.70"
(703.58mm)
4.12"
(104.65mm)
126th Driest
Driest since:
1931
2nd Wettest
Wettest to Date
2019
Nov 2016–Oct 2017
12-Month
33.57"
(852.68mm)
29.93"
(760.22mm)
3.64"
(92.46mm)
119th Driest
Driest since:
1934
9th Wettest
Wettest since:
2019
May 2016–Oct 2017
18-Month
50.63"
(1,286.00mm)
45.83"
(1,164.08mm)
4.80"
(121.92mm)
121st Driest
Driest since:
1931
7th Wettest
Wettest since:
2019
Nov 2015–Oct 2017
24-Month
67.93"
(1,725.42mm)
59.90"
(1,521.46mm)
8.03"
(203.96mm)
125th Driest
Driest since:
1931
2nd Wettest
Wettest to Date
2019
Nov 2014–Oct 2017
36-Month
99.82"
(2,535.43mm)
89.86"
(2,282.44mm)
9.96"
(252.99mm)
122nd Driest
Driest since:
1956
4th Wettest
Wettest since:
2019
Nov 2013–Oct 2017
48-Month
130.21"
(3,307.33mm)
119.78"
(3,042.41mm)
10.43"
(264.92mm)
119th Driest
Driest since:
1956
6th Wettest
Wettest since:
2019
Nov 2012–Oct 2017
60-Month
161.22"
(4,094.99mm)
149.66"
(3,801.36mm)
11.56"
(293.63mm)
116th Driest
Driest since:
1934
8th Wettest
Wettest since:
2019

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