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 2020

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 2020
1-Month
2.76"
(70.10mm)
2.31"
(58.67mm)
0.45"
(11.43mm)
107th Driest
Driest since:
1981
22nd Wettest
Wettest since:
1916
Dec 2019–Jan 2020
2-Month
5.33"
(135.38mm)
4.66"
(118.36mm)
0.67"
(17.02mm)
104th Driest
Driest since:
1981
24th Wettest
Wettest since:
1932
Nov 2019–Jan 2020
3-Month
7.27"
(184.66mm)
6.89"
(175.01mm)
0.38"
(9.65mm)
88th Driest
Driest since:
1977
40th Wettest
Wettest since:
2016
Oct 2019–Jan 2020
4-Month
10.46"
(265.68mm)
9.06"
(230.12mm)
1.40"
(35.56mm)
109th Driest
Driest since:
1981
19th Wettest
Wettest since:
2016
Sep 2019–Jan 2020
5-Month
12.91"
(327.91mm)
11.55"
(293.37mm)
1.36"
(34.54mm)
102nd Driest
Driest since:
1940
26th Wettest
Wettest since:
2019
Aug 2019–Jan 2020
6-Month
15.69"
(398.53mm)
14.17"
(359.92mm)
1.52"
(38.61mm)
103rd Driest
Driest since:
1940
25th Wettest
Wettest since:
2019
Jul 2019–Jan 2020
7-Month
18.45"
(468.63mm)
16.96"
(430.78mm)
1.49"
(37.85mm)
105th Driest
Driest since:
1940
23rd Wettest
Wettest since:
2019
Jun 2019–Jan 2020
8-Month
21.82"
(554.23mm)
19.88"
(504.95mm)
1.94"
(49.28mm)
111th Driest
Driest since:
1981
17th Wettest
Wettest since:
2019
May 2019–Jan 2020
9-Month
26.29"
(667.77mm)
22.79"
(578.87mm)
3.50"
(88.90mm)
121st Driest
Driest since:
1918
7th Wettest
Wettest since:
2016
Apr 2019–Jan 2020
10-Month
29.50"
(749.30mm)
25.32"
(643.13mm)
4.18"
(106.17mm)
121st Driest
Driest since:
1940
7th Wettest
Wettest since:
2016
Mar 2019–Jan 2020
11-Month
31.74"
(806.20mm)
27.83"
(706.88mm)
3.91"
(99.32mm)
121st Driest
Driest since:
1957
7th Wettest
Wettest since:
1974
Feb 2019–Jan 2020
12-Month
35.02"
(889.51mm)
29.96"
(760.98mm)
5.06"
(128.53mm)
125th Driest
Driest since:
1931
3rd Wettest
Wettest since:
1974
Aug 2018–Jan 2020
18-Month
53.52"
(1,359.41mm)
44.14"
(1,121.16mm)
9.38"
(238.25mm)
126th Driest
Driest since:
1955
1st Wettest
Wettest to Date
2020
Feb 2018–Jan 2020
24-Month
70.38"
(1,787.65mm)
59.93"
(1,522.22mm)
10.45"
(265.43mm)
126th Driest
Driest since:
1918
1st Wettest
Wettest to Date
2020
Feb 2017–Jan 2020
36-Month
101.30"
(2,573.02mm)
89.86"
(2,282.44mm)
11.44"
(290.58mm)
125th Driest
Driest since:
1957
1st Wettest
Wettest to Date
2020
Feb 2016–Jan 2020
48-Month
133.92"
(3,401.57mm)
119.76"
(3,041.90mm)
14.16"
(359.67mm)
124th Driest
Driest since:
1957
1st Wettest
Wettest to Date
2020
Feb 2015–Jan 2020
60-Month
168.72"
(4,285.49mm)
149.63"
(3,800.60mm)
19.09"
(484.89mm)
123rd Driest
Driest since:
1957
1st Wettest
Wettest to Date
2020

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