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 1938

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 1938
1-Month
1.71"
(43.43mm)
2.35"
(59.69mm)
-0.64"
(-16.26mm)
17th Driest
Driest since:
1930
111th Wettest
Wettest since:
2015
Ties: 2000
Nov–Dec 1938
2-Month
3.72"
(94.49mm)
4.58"
(116.33mm)
-0.86"
(-21.84mm)
23rd Driest
Driest since:
1976
105th Wettest
Wettest since:
2015
Oct–Dec 1938
3-Month
5.02"
(127.51mm)
6.74"
(171.20mm)
-1.72"
(-43.69mm)
7th Driest
Driest since:
1917
121st Wettest
Wettest since:
2015
Sep–Dec 1938
4-Month
7.47"
(189.74mm)
9.23"
(234.44mm)
-1.76"
(-44.70mm)
13th Driest
Driest since:
1939
115th Wettest
Wettest since:
2018
Aug–Dec 1938
5-Month
9.53"
(242.06mm)
11.85"
(300.99mm)
-2.32"
(-58.93mm)
7th Driest
Driest since:
1917
121st Wettest
Wettest since:
2018
Jul–Dec 1938
6-Month
12.87"
(326.90mm)
14.62"
(371.35mm)
-1.75"
(-44.45mm)
15th Driest
Driest since:
1917
113th Wettest
Wettest since:
2018
Jun–Dec 1938
7-Month
15.99"
(406.15mm)
17.55"
(445.77mm)
-1.56"
(-39.62mm)
21st Driest
Driest since:
1917
107th Wettest
Wettest since:
2018
Ties: 2012
May–Dec 1938
8-Month
19.23"
(488.44mm)
20.46"
(519.68mm)
-1.23"
(-31.24mm)
29th Driest
Driest since:
1917
99th Wettest
Wettest since:
2015
Ties: 1925
Apr–Dec 1938
9-Month
21.92"
(556.77mm)
22.98"
(583.69mm)
-1.06"
(-26.92mm)
35th Driest
Driest since:
1956
93rd Wettest
Wettest since:
2015
Mar–Dec 1938
10-Month
25.22"
(640.59mm)
25.49"
(647.45mm)
-0.27"
(-6.86mm)
49th Driest
Driest since:
1956
79th Wettest
Wettest since:
2015
Feb–Dec 1938
11-Month
27.63"
(701.80mm)
27.62"
(701.55mm)
0.01"
(0.25mm)
61st Driest
Driest since:
1910
67th Wettest
Wettest since:
2018
Jan–Dec 1938
12-Month
29.74"
(755.40mm)
29.94"
(760.48mm)
-0.20"
(-5.08mm)
49th Driest
Driest since:
1910
79th Wettest
Wettest since:
1973
Jul 1937–Dec 1938
18-Month
44.11"
(1,120.39mm)
44.58"
(1,132.33mm)
-0.47"
(-11.94mm)
46th Driest
Driest since:
1954
81st Wettest
Wettest since:
2019
Jan 1937–Dec 1938
24-Month
60.25"
(1,530.35mm)
59.90"
(1,521.46mm)
0.35"
(8.89mm)
64th Driest
Driest since:
1931
63rd Wettest
Wettest since:
2019
Jan 1936–Dec 1938
36-Month
87.53"
(2,223.26mm)
89.86"
(2,282.44mm)
-2.33"
(-59.18mm)
37th Driest
Driest since:
1956
89th Wettest
Wettest since:
2019
Jan 1935–Dec 1938
48-Month
117.01"
(2,972.05mm)
119.78"
(3,042.41mm)
-2.77"
(-70.36mm)
38th Driest
Driest since:
1956
87th Wettest
Wettest since:
2019
Jan 1934–Dec 1938
60-Month
142.80"
(3,627.12mm)
149.68"
(3,801.87mm)
-6.88"
(-174.75mm)
10th Driest
Driest since:
1956
114th Wettest
Wettest since:
2019

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