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 2012

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 2012
1-Month
2.23"
(56.64mm)
2.16"
(54.86mm)
0.07"
(1.78mm)
68th Driest
Driest since:
1952
61st Wettest
Wettest since:
2009
Ties: 1928, 2013
Sep–Oct 2012
2-Month
4.57"
(116.08mm)
4.65"
(118.11mm)
-0.08"
(-2.03mm)
47th Driest
Driest since:
1952
82nd Wettest
Wettest since:
2018
Ties: 1989
Aug–Oct 2012
3-Month
7.04"
(178.82mm)
7.27"
(184.66mm)
-0.23"
(-5.84mm)
46th Driest
Driest since:
1952
83rd Wettest
Wettest since:
2018
Ties: 2020
Jul–Oct 2012
4-Month
9.55"
(242.57mm)
10.05"
(255.27mm)
-0.50"
(-12.70mm)
37th Driest
Driest since:
1952
92nd Wettest
Wettest since:
1941
Jun–Oct 2012
5-Month
11.79"
(299.47mm)
12.97"
(329.44mm)
-1.18"
(-29.97mm)
23rd Driest
Driest since:
1952
106th Wettest
Wettest since:
1941
May–Oct 2012
6-Month
14.29"
(362.97mm)
15.88"
(403.35mm)
-1.59"
(-40.38mm)
19th Driest
Driest since:
1952
110th Wettest
Wettest since:
1941
Apr–Oct 2012
7-Month
16.52"
(419.61mm)
18.40"
(467.36mm)
-1.88"
(-47.75mm)
17th Driest
Driest since:
1952
112th Wettest
Wettest since:
1941
Mar–Oct 2012
8-Month
19.39"
(492.51mm)
20.91"
(531.11mm)
-1.52"
(-38.60mm)
19th Driest
Driest since:
1956
110th Wettest
Wettest since:
2019
Feb–Oct 2012
9-Month
21.24"
(539.50mm)
23.04"
(585.22mm)
-1.80"
(-45.72mm)
17th Driest
Driest since:
1934
112th Wettest
Wettest since:
2019
Jan–Oct 2012
10-Month
23.33"
(592.58mm)
25.36"
(644.14mm)
-2.03"
(-51.56mm)
16th Driest
Driest since:
1934
113th Wettest
Wettest since:
2019
Dec 2011–Oct 2012
11-Month
25.59"
(649.99mm)
27.70"
(703.58mm)
-2.11"
(-53.59mm)
19th Driest
Driest since:
1931
109th Wettest
Wettest since:
2019
Ties: 1987
Nov 2011–Oct 2012
12-Month
28.06"
(712.72mm)
29.93"
(760.22mm)
-1.87"
(-47.50mm)
25th Driest
Driest since:
1934
103rd Wettest
Wettest since:
2019
May 2011–Oct 2012
18-Month
43.47"
(1,104.14mm)
45.83"
(1,164.08mm)
-2.36"
(-59.94mm)
23rd Driest
Driest since:
1931
105th Wettest
Wettest since:
2019
Ties: 1981, 2001
Nov 2010–Oct 2012
24-Month
58.10"
(1,475.74mm)
59.90"
(1,521.46mm)
-1.80"
(-45.72mm)
36th Driest
Driest since:
1931
91st Wettest
Wettest since:
2019
Nov 2009–Oct 2012
36-Month
89.51"
(2,273.55mm)
89.86"
(2,282.44mm)
-0.35"
(-8.89mm)
56th Driest
Driest since:
1956
70th Wettest
Wettest since:
2019
Nov 2008–Oct 2012
48-Month
121.89"
(3,096.01mm)
119.78"
(3,042.41mm)
2.11"
(53.60mm)
76th Driest
Driest since:
1956
49th Wettest
Wettest since:
2019
Nov 2007–Oct 2012
60-Month
152.71"
(3,878.83mm)
149.66"
(3,801.36mm)
3.05"
(77.47mm)
81st Driest
Driest since:
1934
43rd Wettest
Wettest since:
2019

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