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 1970

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 1970
1-Month
2.22"
(56.39mm)
2.35"
(59.69mm)
-0.13"
(-3.30mm)
49th Driest
Driest since:
1930
79th Wettest
Wettest since:
2015
Ties: 1949, 1959
Nov–Dec 1970
2-Month
4.42"
(112.27mm)
4.58"
(116.33mm)
-0.16"
(-4.06mm)
49th Driest
Driest since:
1976
79th Wettest
Wettest since:
2015
Ties: 1981
Oct–Dec 1970
3-Month
7.30"
(185.42mm)
6.74"
(171.20mm)
0.56"
(14.22mm)
86th Driest
Driest since:
1917
42nd Wettest
Wettest since:
2015
Sep–Dec 1970
4-Month
10.36"
(263.14mm)
9.23"
(234.44mm)
1.13"
(28.70mm)
103rd Driest
Driest since:
1939
25th Wettest
Wettest since:
2018
Ties: 1906
Aug–Dec 1970
5-Month
12.73"
(323.34mm)
11.85"
(300.99mm)
0.88"
(22.35mm)
88th Driest
Driest since:
1917
40th Wettest
Wettest since:
2018
Jul–Dec 1970
6-Month
15.14"
(384.56mm)
14.62"
(371.35mm)
0.52"
(13.21mm)
75th Driest
Driest since:
1917
53rd Wettest
Wettest since:
2018
Ties: 1918
Jun–Dec 1970
7-Month
17.91"
(454.91mm)
17.55"
(445.77mm)
0.36"
(9.14mm)
67th Driest
Driest since:
1917
61st Wettest
Wettest since:
2018
Ties: 1965
May–Dec 1970
8-Month
20.52"
(521.21mm)
20.46"
(519.68mm)
0.06"
(1.53mm)
61st Driest
Driest since:
1917
67th Wettest
Wettest since:
2015
Apr–Dec 1970
9-Month
23.30"
(591.82mm)
22.98"
(583.69mm)
0.32"
(8.13mm)
65th Driest
Driest since:
1956
63rd Wettest
Wettest since:
2015
Mar–Dec 1970
10-Month
25.98"
(659.89mm)
25.49"
(647.45mm)
0.49"
(12.44mm)
67th Driest
Driest since:
1956
61st Wettest
Wettest since:
2015
Feb–Dec 1970
11-Month
27.61"
(701.29mm)
27.62"
(701.55mm)
-0.01"
(-0.26mm)
58th Driest
Driest since:
1910
70th Wettest
Wettest since:
2018
Jan–Dec 1970
12-Month
29.70"
(754.38mm)
29.94"
(760.48mm)
-0.24"
(-6.10mm)
47th Driest
Driest since:
1910
81st Wettest
Wettest since:
1973
Ties: 1897
Jul 1969–Dec 1970
18-Month
44.63"
(1,133.60mm)
44.58"
(1,132.33mm)
0.05"
(1.27mm)
57th Driest
Driest since:
1954
70th Wettest
Wettest since:
2019
Jan 1969–Dec 1970
24-Month
60.33"
(1,532.38mm)
59.90"
(1,521.46mm)
0.43"
(10.92mm)
66th Driest
Driest since:
1931
61st Wettest
Wettest since:
2019
Jan 1968–Dec 1970
36-Month
90.72"
(2,304.29mm)
89.86"
(2,282.44mm)
0.86"
(21.85mm)
73rd Driest
Driest since:
1956
53rd Wettest
Wettest since:
2019
Jan 1967–Dec 1970
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: 2008
Jan 1966–Dec 1970
60-Month
147.78"
(3,753.61mm)
149.68"
(3,801.87mm)
-1.90"
(-48.26mm)
44th Driest
Driest since:
1956
80th Wettest
Wettest since:
2019

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