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

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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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