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, December 2012

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 2012
1-Month
2.88"
(73.15mm)
2.35"
(59.69mm)
0.53"
(13.46mm)
107th Driest
Driest since:
1930
21st Wettest
Wettest since:
2015
Ties: 1906
Nov–Dec 2012
2-Month
4.20"
(106.68mm)
4.58"
(116.33mm)
-0.38"
(-9.65mm)
42nd Driest
Driest since:
1976
86th Wettest
Wettest since:
2015
Ties: 1979
Oct–Dec 2012
3-Month
6.43"
(163.32mm)
6.74"
(171.20mm)
-0.31"
(-7.88mm)
44th Driest
Driest since:
1917
84th Wettest
Wettest since:
2015
Sep–Dec 2012
4-Month
8.77"
(222.76mm)
9.23"
(234.44mm)
-0.46"
(-11.68mm)
44th Driest
Driest since:
1939
84th Wettest
Wettest since:
2018
Aug–Dec 2012
5-Month
11.24"
(285.50mm)
11.85"
(300.99mm)
-0.61"
(-15.49mm)
36th Driest
Driest since:
1917
92nd Wettest
Wettest since:
2018
Jul–Dec 2012
6-Month
13.75"
(349.25mm)
14.62"
(371.35mm)
-0.87"
(-22.10mm)
33rd Driest
Driest since:
1917
95th Wettest
Wettest since:
2018
Jun–Dec 2012
7-Month
15.99"
(406.15mm)
17.55"
(445.77mm)
-1.56"
(-39.62mm)
21st Driest
Driest since:
1917
107th Wettest
Wettest since:
2018
Ties: 1938
May–Dec 2012
8-Month
18.49"
(469.65mm)
20.46"
(519.68mm)
-1.97"
(-50.03mm)
20th Driest
Driest since:
1917
108th Wettest
Wettest since:
2015
Ties: 1904
Apr–Dec 2012
9-Month
20.72"
(526.29mm)
22.98"
(583.69mm)
-2.26"
(-57.40mm)
17th Driest
Driest since:
1956
111th Wettest
Wettest since:
2015
Mar–Dec 2012
10-Month
23.59"
(599.19mm)
25.49"
(647.45mm)
-1.90"
(-48.26mm)
21st Driest
Driest since:
1956
107th Wettest
Wettest since:
2015
Feb–Dec 2012
11-Month
25.44"
(646.18mm)
27.62"
(701.55mm)
-2.18"
(-55.37mm)
20th Driest
Driest since:
1910
108th Wettest
Wettest since:
2018
Jan–Dec 2012
12-Month
27.53"
(699.26mm)
29.94"
(760.48mm)
-2.41"
(-61.22mm)
19th Driest
Driest since:
1910
109th Wettest
Wettest since:
1973
Jul 2011–Dec 2012
18-Month
41.66"
(1,058.16mm)
44.58"
(1,132.33mm)
-2.92"
(-74.17mm)
20th Driest
Driest since:
1954
107th Wettest
Wettest since:
2019
Jan 2011–Dec 2012
24-Month
57.63"
(1,463.80mm)
59.90"
(1,521.46mm)
-2.27"
(-57.66mm)
30th Driest
Driest since:
1931
97th Wettest
Wettest since:
2019
Jan 2010–Dec 2012
36-Month
89.00"
(2,260.60mm)
89.86"
(2,282.44mm)
-0.86"
(-21.84mm)
50th Driest
Driest since:
1956
76th Wettest
Wettest since:
2019
Jan 2009–Dec 2012
48-Month
121.30"
(3,081.02mm)
119.78"
(3,042.41mm)
1.52"
(38.61mm)
72nd Driest
Driest since:
1956
53rd Wettest
Wettest since:
2019
Jan 2008–Dec 2012
60-Month
152.54"
(3,874.52mm)
149.68"
(3,801.87mm)
2.86"
(72.65mm)
79th Driest
Driest since:
1956
45th Wettest
Wettest since:
2019

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