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 2018

View Period (Months):
Download: csv json xml
  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 2018
1-Month
3.43"
(87.12mm)
2.16"
(54.86mm)
1.27"
(32.26mm)
123rd Driest
Driest since:
1952
6th Wettest
Wettest since:
2009
Sep–Oct 2018
2-Month
7.00"
(177.80mm)
4.65"
(118.11mm)
2.35"
(59.69mm)
128th Driest
Driest since:
1952
1st Wettest
Wettest to Date
2018
Aug–Oct 2018
3-Month
9.98"
(253.49mm)
7.27"
(184.66mm)
2.71"
(68.83mm)
128th Driest
Driest since:
1952
1st Wettest
Wettest to Date
2018
Jul–Oct 2018
4-Month
12.84"
(326.14mm)
10.05"
(255.27mm)
2.79"
(70.87mm)
127th Driest
Driest since:
1952
2nd Wettest
Wettest since:
1941
Jun–Oct 2018
5-Month
15.99"
(406.15mm)
12.97"
(329.44mm)
3.02"
(76.71mm)
127th Driest
Driest since:
1952
2nd Wettest
Wettest since:
1941
May–Oct 2018
6-Month
19.01"
(482.85mm)
15.88"
(403.35mm)
3.13"
(79.50mm)
126th Driest
Driest since:
1952
3rd Wettest
Wettest since:
1941
Apr–Oct 2018
7-Month
21.47"
(545.34mm)
18.40"
(467.36mm)
3.07"
(77.98mm)
123rd Driest
Driest since:
1952
6th Wettest
Wettest since:
1941
Mar–Oct 2018
8-Month
23.95"
(608.33mm)
20.91"
(531.11mm)
3.04"
(77.22mm)
123rd Driest
Driest since:
1956
6th Wettest
Wettest since:
2019
Feb–Oct 2018
9-Month
26.84"
(681.74mm)
23.04"
(585.22mm)
3.80"
(96.52mm)
127th Driest
Driest since:
1934
2nd Wettest
Wettest to Date
2019
Jan–Oct 2018
10-Month
28.69"
(728.73mm)
25.36"
(644.14mm)
3.33"
(84.59mm)
124th Driest
Driest since:
1934
5th Wettest
Wettest since:
2019
Dec 2017–Oct 2018
11-Month
30.28"
(769.11mm)
27.70"
(703.58mm)
2.58"
(65.53mm)
113th Driest
Driest since:
1931
15th Wettest
Wettest since:
2019
Nov 2017–Oct 2018
12-Month
31.90"
(810.26mm)
29.93"
(760.22mm)
1.97"
(50.04mm)
100th Driest
Driest since:
1934
28th Wettest
Wettest since:
2019
May 2017–Oct 2018
18-Month
49.42"
(1,255.27mm)
45.83"
(1,164.08mm)
3.59"
(91.19mm)
111th Driest
Driest since:
1931
17th Wettest
Wettest since:
2019
Nov 2016–Oct 2018
24-Month
65.47"
(1,662.94mm)
59.90"
(1,521.46mm)
5.57"
(141.48mm)
115th Driest
Driest since:
1931
12th Wettest
Wettest since:
2019
Nov 2015–Oct 2018
36-Month
99.83"
(2,535.68mm)
89.86"
(2,282.44mm)
9.97"
(253.24mm)
123rd Driest
Driest since:
1956
3rd Wettest
Wettest since:
2019
Nov 2014–Oct 2018
48-Month
131.72"
(3,345.69mm)
119.78"
(3,042.41mm)
11.94"
(303.28mm)
121st Driest
Driest since:
1956
4th Wettest
Wettest since:
2019
Nov 2013–Oct 2018
60-Month
162.11"
(4,117.59mm)
149.66"
(3,801.36mm)
12.45"
(316.23mm)
117th Driest
Driest since:
1934
7th Wettest
Wettest since:
2019

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