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 2011

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 2011
1-Month
2.14"
(54.36mm)
2.16"
(54.86mm)
-0.02"
(-0.50mm)
57th Driest
Driest since:
1952
72nd Wettest
Wettest since:
2009
Sep–Oct 2011
2-Month
4.62"
(117.35mm)
4.65"
(118.11mm)
-0.03"
(-0.76mm)
53rd Driest
Driest since:
1952
76th Wettest
Wettest since:
2018
Ties: 1915, 2020
Aug–Oct 2011
3-Month
6.96"
(176.78mm)
7.27"
(184.66mm)
-0.31"
(-7.88mm)
44th Driest
Driest since:
1952
85th Wettest
Wettest since:
2018
Jul–Oct 2011
4-Month
9.40"
(238.76mm)
10.05"
(255.27mm)
-0.65"
(-16.51mm)
34th Driest
Driest since:
1952
95th Wettest
Wettest since:
1941
Jun–Oct 2011
5-Month
11.98"
(304.29mm)
12.97"
(329.44mm)
-0.99"
(-25.15mm)
27th Driest
Driest since:
1952
102nd Wettest
Wettest since:
1941
Ties: 1901
May–Oct 2011
6-Month
15.41"
(391.41mm)
15.88"
(403.35mm)
-0.47"
(-11.94mm)
41st Driest
Driest since:
1952
88th Wettest
Wettest since:
1941
Ties: 1913, 1925
Apr–Oct 2011
7-Month
18.83"
(478.28mm)
18.40"
(467.36mm)
0.43"
(10.92mm)
70th Driest
Driest since:
1952
59th Wettest
Wettest since:
1941
Ties: 1935
Mar–Oct 2011
8-Month
21.74"
(552.20mm)
20.91"
(531.11mm)
0.83"
(21.09mm)
82nd Driest
Driest since:
1956
47th Wettest
Wettest since:
2019
Feb–Oct 2011
9-Month
23.72"
(602.49mm)
23.04"
(585.22mm)
0.68"
(17.27mm)
77th Driest
Driest since:
1934
52nd Wettest
Wettest since:
2019
Jan–Oct 2011
10-Month
25.37"
(644.40mm)
25.36"
(644.14mm)
0.01"
(0.26mm)
58th Driest
Driest since:
1934
71st Wettest
Wettest since:
2019
Dec 2010–Oct 2011
11-Month
27.82"
(706.63mm)
27.70"
(703.58mm)
0.12"
(3.05mm)
65th Driest
Driest since:
1931
63rd Wettest
Wettest since:
2019
Nov 2010–Oct 2011
12-Month
30.04"
(763.02mm)
29.93"
(760.22mm)
0.11"
(2.80mm)
62nd Driest
Driest since:
1934
66th Wettest
Wettest since:
2019
May 2010–Oct 2011
18-Month
47.43"
(1,204.72mm)
45.83"
(1,164.08mm)
1.60"
(40.64mm)
84th Driest
Driest since:
1931
44th Wettest
Wettest since:
2019
Nov 2009–Oct 2011
24-Month
61.45"
(1,560.83mm)
59.90"
(1,521.46mm)
1.55"
(39.37mm)
79th Driest
Driest since:
1931
48th Wettest
Wettest since:
2019
Nov 2008–Oct 2011
36-Month
93.83"
(2,383.28mm)
89.86"
(2,282.44mm)
3.97"
(100.84mm)
100th Driest
Driest since:
1956
26th Wettest
Wettest since:
2019
Nov 2007–Oct 2011
48-Month
124.65"
(3,166.11mm)
119.78"
(3,042.41mm)
4.87"
(123.70mm)
102nd Driest
Driest since:
1956
23rd Wettest
Wettest since:
2019
Nov 2006–Oct 2011
60-Month
154.49"
(3,924.05mm)
149.66"
(3,801.36mm)
4.83"
(122.69mm)
94th Driest
Driest since:
1934
30th Wettest
Wettest since:
2019

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