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 1986

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 1986
1-Month
2.00"
(50.80mm)
2.35"
(59.69mm)
-0.35"
(-8.89mm)
34th Driest
Driest since:
1930
94th Wettest
Wettest since:
2015
Ties: 1954, 1956
Nov–Dec 1986
2-Month
4.94"
(125.48mm)
4.58"
(116.33mm)
0.36"
(9.15mm)
91st Driest
Driest since:
1976
37th Wettest
Wettest since:
2015
Ties: 1907, 1932, 1945, 2002
Oct–Dec 1986
3-Month
7.75"
(196.85mm)
6.74"
(171.20mm)
1.01"
(25.65mm)
102nd Driest
Driest since:
1917
26th Wettest
Wettest since:
2015
Sep–Dec 1986
4-Month
11.34"
(288.04mm)
9.23"
(234.44mm)
2.11"
(53.60mm)
117th Driest
Driest since:
1939
11th Wettest
Wettest since:
2018
Aug–Dec 1986
5-Month
14.16"
(359.66mm)
11.85"
(300.99mm)
2.31"
(58.67mm)
117th Driest
Driest since:
1917
11th Wettest
Wettest since:
2018
Jul–Dec 1986
6-Month
16.91"
(429.51mm)
14.62"
(371.35mm)
2.29"
(58.16mm)
115th Driest
Driest since:
1917
13th Wettest
Wettest since:
2018
Jun–Dec 1986
7-Month
19.94"
(506.48mm)
17.55"
(445.77mm)
2.39"
(60.71mm)
116th Driest
Driest since:
1917
12th Wettest
Wettest since:
2018
May–Dec 1986
8-Month
22.89"
(581.41mm)
20.46"
(519.68mm)
2.43"
(61.73mm)
113th Driest
Driest since:
1917
15th Wettest
Wettest since:
2015
Apr–Dec 1986
9-Month
25.13"
(638.30mm)
22.98"
(583.69mm)
2.15"
(54.61mm)
110th Driest
Driest since:
1956
18th Wettest
Wettest since:
2015
Ties: 1905
Mar–Dec 1986
10-Month
27.11"
(688.59mm)
25.49"
(647.45mm)
1.62"
(41.14mm)
97th Driest
Driest since:
1956
31st Wettest
Wettest since:
2015
Feb–Dec 1986
11-Month
29.93"
(760.22mm)
27.62"
(701.55mm)
2.31"
(58.67mm)
107th Driest
Driest since:
1910
21st Wettest
Wettest since:
2018
Jan–Dec 1986
12-Month
31.38"
(797.05mm)
29.94"
(760.48mm)
1.44"
(36.57mm)
97th Driest
Driest since:
1910
31st Wettest
Wettest since:
1973
Jul 1985–Dec 1986
18-Month
48.21"
(1,224.53mm)
44.58"
(1,132.33mm)
3.63"
(92.20mm)
109th Driest
Driest since:
1954
18th Wettest
Wettest since:
2019
Jan 1985–Dec 1986
24-Month
61.35"
(1,558.29mm)
59.90"
(1,521.46mm)
1.45"
(36.83mm)
82nd Driest
Driest since:
1931
45th Wettest
Wettest since:
2019
Jan 1984–Dec 1986
36-Month
92.75"
(2,355.85mm)
89.86"
(2,282.44mm)
2.89"
(73.41mm)
90th Driest
Driest since:
1956
36th Wettest
Wettest since:
2019
Jan 1983–Dec 1986
48-Month
127.51"
(3,238.75mm)
119.78"
(3,042.41mm)
7.73"
(196.34mm)
109th Driest
Driest since:
1956
16th Wettest
Wettest since:
2019
Jan 1982–Dec 1986
60-Month
161.37"
(4,098.80mm)
149.68"
(3,801.87mm)
11.69"
(296.93mm)
117th Driest
Driest since:
1956
7th Wettest
Wettest to Date
2019

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