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 2008

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 2008
1-Month
2.84"
(72.14mm)
2.35"
(59.69mm)
0.49"
(12.45mm)
104th Driest
Driest since:
1930
24th Wettest
Wettest since:
2015
Ties: 1940
Nov–Dec 2008
2-Month
4.79"
(121.67mm)
4.58"
(116.33mm)
0.21"
(5.34mm)
81st Driest
Driest since:
1976
47th Wettest
Wettest since:
2015
Oct–Dec 2008
3-Month
6.97"
(177.04mm)
6.74"
(171.20mm)
0.23"
(5.84mm)
71st Driest
Driest since:
1917
57th Wettest
Wettest since:
2015
Ties: 1907
Sep–Dec 2008
4-Month
9.65"
(245.11mm)
9.23"
(234.44mm)
0.42"
(10.67mm)
82nd Driest
Driest since:
1939
46th Wettest
Wettest since:
2018
Aug–Dec 2008
5-Month
12.70"
(322.58mm)
11.85"
(300.99mm)
0.85"
(21.59mm)
87th Driest
Driest since:
1917
41st Wettest
Wettest since:
2018
Jul–Dec 2008
6-Month
15.50"
(393.70mm)
14.62"
(371.35mm)
0.88"
(22.35mm)
88th Driest
Driest since:
1917
40th Wettest
Wettest since:
2018
Ties: 2014
Jun–Dec 2008
7-Month
18.50"
(469.90mm)
17.55"
(445.77mm)
0.95"
(24.13mm)
84th Driest
Driest since:
1917
44th Wettest
Wettest since:
2018
May–Dec 2008
8-Month
21.50"
(546.10mm)
20.46"
(519.68mm)
1.04"
(26.42mm)
84th Driest
Driest since:
1917
44th Wettest
Wettest since:
2015
Ties: 1990, 2003
Apr–Dec 2008
9-Month
24.04"
(610.62mm)
22.98"
(583.69mm)
1.06"
(26.93mm)
86th Driest
Driest since:
1956
42nd Wettest
Wettest since:
2015
Ties: 1951, 1979
Mar–Dec 2008
10-Month
26.56"
(674.62mm)
25.49"
(647.45mm)
1.07"
(27.17mm)
82nd Driest
Driest since:
1956
46th Wettest
Wettest since:
2015
Feb–Dec 2008
11-Month
29.03"
(737.36mm)
27.62"
(701.55mm)
1.41"
(35.81mm)
89th Driest
Driest since:
1910
39th Wettest
Wettest since:
2018
Jan–Dec 2008
12-Month
31.24"
(793.50mm)
29.94"
(760.48mm)
1.30"
(33.02mm)
90th Driest
Driest since:
1910
38th Wettest
Wettest since:
1973
Jul 2007–Dec 2008
18-Month
45.98"
(1,167.89mm)
44.58"
(1,132.33mm)
1.40"
(35.56mm)
83rd Driest
Driest since:
1954
44th Wettest
Wettest since:
2019
Jan 2007–Dec 2008
24-Month
60.42"
(1,534.67mm)
59.90"
(1,521.46mm)
0.52"
(13.21mm)
68th Driest
Driest since:
1931
59th Wettest
Wettest since:
2019
Jan 2006–Dec 2008
36-Month
90.24"
(2,292.10mm)
89.86"
(2,282.44mm)
0.38"
(9.66mm)
64th Driest
Driest since:
1956
62nd Wettest
Wettest since:
2019
Jan 2005–Dec 2008
48-Month
120.32"
(3,056.13mm)
119.78"
(3,042.41mm)
0.54"
(13.72mm)
61st Driest
Driest since:
1956
64th Wettest
Wettest since:
2019
Ties: 1970
Jan 2004–Dec 2008
60-Month
153.57"
(3,900.68mm)
149.68"
(3,801.87mm)
3.89"
(98.81mm)
88th Driest
Driest since:
1956
36th Wettest
Wettest since:
2019

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