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 1988

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 1988
1-Month
1.69"
(42.93mm)
2.35"
(59.69mm)
-0.66"
(-16.76mm)
15th Driest
Driest since:
1930
113th Wettest
Wettest since:
2015
Ties: 1910
Nov–Dec 1988
2-Month
4.86"
(123.44mm)
4.58"
(116.33mm)
0.28"
(7.11mm)
84th Driest
Driest since:
1976
44th Wettest
Wettest since:
2015
Oct–Dec 1988
3-Month
6.29"
(159.77mm)
6.74"
(171.20mm)
-0.45"
(-11.43mm)
41st Driest
Driest since:
1917
87th Wettest
Wettest since:
2015
Sep–Dec 1988
4-Month
9.10"
(231.14mm)
9.23"
(234.44mm)
-0.13"
(-3.30mm)
51st Driest
Driest since:
1939
77th Wettest
Wettest since:
2018
Aug–Dec 1988
5-Month
11.67"
(296.42mm)
11.85"
(300.99mm)
-0.18"
(-4.57mm)
50th Driest
Driest since:
1917
78th Wettest
Wettest since:
2018
Ties: 2001
Jul–Dec 1988
6-Month
14.37"
(365.00mm)
14.62"
(371.35mm)
-0.25"
(-6.35mm)
49th Driest
Driest since:
1917
79th Wettest
Wettest since:
2018
Ties: 1937
Jun–Dec 1988
7-Month
15.98"
(405.89mm)
17.55"
(445.77mm)
-1.57"
(-39.88mm)
20th Driest
Driest since:
1917
108th Wettest
Wettest since:
2018
May–Dec 1988
8-Month
18.05"
(458.47mm)
20.46"
(519.68mm)
-2.41"
(-61.21mm)
13th Driest
Driest since:
1917
115th Wettest
Wettest since:
2015
Apr–Dec 1988
9-Month
20.37"
(517.40mm)
22.98"
(583.69mm)
-2.61"
(-66.29mm)
13th Driest
Driest since:
1956
115th Wettest
Wettest since:
2015
Mar–Dec 1988
10-Month
22.41"
(569.21mm)
25.49"
(647.45mm)
-3.08"
(-78.24mm)
11th Driest
Driest since:
1956
117th Wettest
Wettest since:
2015
Feb–Dec 1988
11-Month
23.93"
(607.82mm)
27.62"
(701.55mm)
-3.69"
(-93.73mm)
8th Driest
Driest since:
1910
120th Wettest
Wettest since:
2018
Jan–Dec 1988
12-Month
25.90"
(657.86mm)
29.94"
(760.48mm)
-4.04"
(-102.62mm)
7th Driest
Driest since:
1910
121st Wettest
Wettest since:
1973
Jul 1987–Dec 1988
18-Month
40.23"
(1,021.84mm)
44.58"
(1,132.33mm)
-4.35"
(-110.49mm)
14th Driest
Driest since:
1954
113th Wettest
Wettest since:
2019
Jan 1987–Dec 1988
24-Month
54.91"
(1,394.71mm)
59.90"
(1,521.46mm)
-4.99"
(-126.75mm)
12th Driest
Driest since:
1931
115th Wettest
Wettest since:
2019
Jan 1986–Dec 1988
36-Month
86.29"
(2,191.77mm)
89.86"
(2,282.44mm)
-3.57"
(-90.67mm)
24th Driest
Driest since:
1956
102nd Wettest
Wettest since:
2019
Ties: 2002
Jan 1985–Dec 1988
48-Month
116.26"
(2,953.00mm)
119.78"
(3,042.41mm)
-3.52"
(-89.41mm)
27th Driest
Driest since:
1956
98th Wettest
Wettest since:
2019
Jan 1984–Dec 1988
60-Month
147.66"
(3,750.56mm)
149.68"
(3,801.87mm)
-2.02"
(-51.31mm)
42nd Driest
Driest since:
1956
82nd Wettest
Wettest since:
2019

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