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 1956

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
December 1956
1-Month
2.00"
(50.80mm)
2.35"
(59.69mm)
-0.35"
(-8.89mm)
34th Driest
Driest since:
1930
95th Wettest
Wettest since:
2015
Ties: 1954, 1986
Nov–Dec 1956
2-Month
3.36"
(85.34mm)
4.58"
(116.33mm)
-1.22"
(-30.99mm)
11th Driest
Driest since:
1976
118th Wettest
Wettest since:
2015
Oct–Dec 1956
3-Month
5.36"
(136.14mm)
6.74"
(171.20mm)
-1.38"
(-35.06mm)
14th Driest
Driest since:
1917
115th Wettest
Wettest since:
2015
Sep–Dec 1956
4-Month
6.80"
(172.72mm)
9.23"
(234.44mm)
-2.43"
(-61.72mm)
4th Driest
Driest since:
1939
125th Wettest
Wettest since:
2018
Aug–Dec 1956
5-Month
9.01"
(228.85mm)
11.85"
(300.99mm)
-2.84"
(-72.14mm)
3rd Driest
Driest since:
1917
126th Wettest
Wettest since:
2018
Jul–Dec 1956
6-Month
11.79"
(299.47mm)
14.62"
(371.35mm)
-2.83"
(-71.88mm)
5th Driest
Driest since:
1917
124th Wettest
Wettest since:
2018
Jun–Dec 1956
7-Month
14.00"
(355.60mm)
17.55"
(445.77mm)
-3.55"
(-90.17mm)
3rd Driest
Driest since:
1917
126th Wettest
Wettest since:
2018
May–Dec 1956
8-Month
16.60"
(421.64mm)
20.46"
(519.68mm)
-3.86"
(-98.04mm)
3rd Driest
Driest since:
1917
126th Wettest
Wettest since:
2015
Apr–Dec 1956
9-Month
18.67"
(474.22mm)
22.98"
(583.69mm)
-4.31"
(-109.47mm)
1st Driest
Driest since:
1956
128th Wettest
Wettest since:
2015
Mar–Dec 1956
10-Month
20.49"
(520.45mm)
25.49"
(647.45mm)
-5.00"
(-127.00mm)
1st Driest
Driest since:
1956
128th Wettest
Wettest since:
2015
Feb–Dec 1956
11-Month
23.11"
(586.99mm)
27.62"
(701.55mm)
-4.51"
(-114.56mm)
3rd Driest
Driest since:
1910
126th Wettest
Wettest since:
2018
Jan–Dec 1956
12-Month
25.38"
(644.65mm)
29.94"
(760.48mm)
-4.56"
(-115.83mm)
3rd Driest
Driest since:
1910
126th Wettest
Wettest since:
1973
Jul 1955–Dec 1956
18-Month
39.35"
(999.49mm)
44.58"
(1,132.33mm)
-5.23"
(-132.84mm)
5th Driest
Driest since:
1954
123rd Wettest
Wettest since:
2019
Jan 1955–Dec 1956
24-Month
53.12"
(1,349.25mm)
59.90"
(1,521.46mm)
-6.78"
(-172.21mm)
2nd Driest
Driest since:
1931
126th Wettest
Wettest since:
2019
Jan 1954–Dec 1956
36-Month
79.27"
(2,013.46mm)
89.86"
(2,282.44mm)
-10.59"
(-268.98mm)
1st Driest
Driest since:
1956
126th Wettest
Wettest since:
2019
Jan 1953–Dec 1956
48-Month
107.58"
(2,732.53mm)
119.78"
(3,042.41mm)
-12.20"
(-309.88mm)
1st Driest
Driest since:
1956
125th Wettest
Wettest since:
2019
Jan 1952–Dec 1956
60-Month
133.92"
(3,401.57mm)
149.68"
(3,801.87mm)
-15.76"
(-400.30mm)
1st Driest
Driest since:
1956
124th Wettest
Wettest since:
2019

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