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, January 1939

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
January 1939
1-Month
2.49"
(63.25mm)
2.31"
(58.67mm)
0.18"
(4.58mm)
90th Driest
Driest since:
1981
39th Wettest
Wettest since:
1916
Dec 1938–Jan 1939
2-Month
4.20"
(106.68mm)
4.66"
(118.36mm)
-0.46"
(-11.68mm)
38th Driest
Driest since:
1981
90th Wettest
Wettest since:
1932
Ties: 1994
Nov 1938–Jan 1939
3-Month
6.21"
(157.73mm)
6.89"
(175.01mm)
-0.68"
(-17.28mm)
31st Driest
Driest since:
1977
97th Wettest
Wettest since:
2016
Oct 1938–Jan 1939
4-Month
7.51"
(190.75mm)
9.06"
(230.12mm)
-1.55"
(-39.37mm)
14th Driest
Driest since:
1981
114th Wettest
Wettest since:
2016
Sep 1938–Jan 1939
5-Month
9.96"
(252.98mm)
11.55"
(293.37mm)
-1.59"
(-40.39mm)
19th Driest
Driest since:
1940
109th Wettest
Wettest since:
2019
Ties: 1917
Aug 1938–Jan 1939
6-Month
12.02"
(305.31mm)
14.17"
(359.92mm)
-2.15"
(-54.61mm)
11th Driest
Driest since:
1940
117th Wettest
Wettest since:
2019
Jul 1938–Jan 1939
7-Month
15.36"
(390.14mm)
16.96"
(430.78mm)
-1.60"
(-40.64mm)
22nd Driest
Driest since:
1940
106th Wettest
Wettest since:
2019
Jun 1938–Jan 1939
8-Month
18.48"
(469.39mm)
19.88"
(504.95mm)
-1.40"
(-35.56mm)
27th Driest
Driest since:
1981
101st Wettest
Wettest since:
2019
May 1938–Jan 1939
9-Month
21.72"
(551.69mm)
22.79"
(578.87mm)
-1.07"
(-27.18mm)
35th Driest
Driest since:
1918
93rd Wettest
Wettest since:
2016
Apr 1938–Jan 1939
10-Month
24.41"
(620.01mm)
25.32"
(643.13mm)
-0.91"
(-23.12mm)
37th Driest
Driest since:
1940
91st Wettest
Wettest since:
2016
Ties: 1922
Mar 1938–Jan 1939
11-Month
27.71"
(703.83mm)
27.83"
(706.88mm)
-0.12"
(-3.05mm)
51st Driest
Driest since:
1957
77th Wettest
Wettest since:
1974
Ties: 1897
Feb 1938–Jan 1939
12-Month
30.12"
(765.05mm)
29.96"
(760.98mm)
0.16"
(4.07mm)
63rd Driest
Driest since:
1931
65th Wettest
Wettest since:
1974
Aug 1937–Jan 1939
18-Month
43.98"
(1,117.09mm)
44.14"
(1,121.16mm)
-0.16"
(-4.07mm)
57th Driest
Driest since:
1955
70th Wettest
Wettest since:
2020
Feb 1937–Jan 1939
24-Month
59.09"
(1,500.89mm)
59.93"
(1,522.22mm)
-0.84"
(-21.33mm)
50th Driest
Driest since:
1918
77th Wettest
Wettest since:
2020
Feb 1936–Jan 1939
36-Month
87.14"
(2,213.36mm)
89.86"
(2,282.44mm)
-2.72"
(-69.08mm)
32nd Driest
Driest since:
1957
94th Wettest
Wettest since:
2020
Feb 1935–Jan 1939
48-Month
117.10"
(2,974.34mm)
119.76"
(3,041.90mm)
-2.66"
(-67.56mm)
41st Driest
Driest since:
1957
84th Wettest
Wettest since:
2020
Feb 1934–Jan 1939
60-Month
143.47"
(3,644.14mm)
149.63"
(3,800.60mm)
-6.16"
(-156.46mm)
14th Driest
Driest since:
1957
110th Wettest
Wettest since:
2020
Ties: 1941

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