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 2021

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 2021
1-Month 		2.09"
(53.09mm)		 2.31"
(58.67mm)		 -0.22"
(-5.58mm)		 45th Driest
Driest since:
 1981
84th Wettest
Wettest since:
 1916
Ties: 1970, 2012
Dec 2020–Jan 2021
2-Month 		4.14"
(105.16mm)		 4.66"
(118.36mm)		 -0.52"
(-13.20mm)		 36th Driest
Driest since:
 1981
92nd Wettest
Wettest since:
 1932
Nov 2020–Jan 2021
3-Month 		6.08"
(154.43mm)		 6.89"
(175.01mm)		 -0.81"
(-20.58mm)		 24th Driest
Driest since:
 1977
104th Wettest
Wettest since:
 2016
Oct 2020–Jan 2021
4-Month 		8.26"
(209.80mm)		 9.06"
(230.12mm)		 -0.80"
(-20.32mm)		 30th Driest
Driest since:
 1981
98th Wettest
Wettest since:
 2016
Sep 2020–Jan 2021
5-Month 		10.70"
(271.78mm)		 11.55"
(293.37mm)		 -0.85"
(-21.59mm)		 33rd Driest
Driest since:
 1940
95th Wettest
Wettest since:
 2019
Aug 2020–Jan 2021
6-Month 		13.12"
(333.25mm)		 14.17"
(359.92mm)		 -1.05"
(-26.67mm)		 30th Driest
Driest since:
 1940
98th Wettest
Wettest since:
 2019
Jul 2020–Jan 2021
7-Month 		16.06"
(407.92mm)		 16.96"
(430.78mm)		 -0.90"
(-22.86mm)		 33rd Driest
Driest since:
 1940
95th Wettest
Wettest since:
 2019
Jun 2020–Jan 2021
8-Month 		18.79"
(477.27mm)		 19.88"
(504.95mm)		 -1.09"
(-27.68mm)		 31st Driest
Driest since:
 1981
97th Wettest
Wettest since:
 2019
Ties: 1898
May 2020–Jan 2021
9-Month 		21.88"
(555.75mm)		 22.79"
(578.87mm)		 -0.91"
(-23.12mm)		 37th Driest
Driest since:
 1918
91st Wettest
Wettest since:
 2016
Apr 2020–Jan 2021
10-Month 		24.40"
(619.76mm)		 25.32"
(643.13mm)		 -0.92"
(-23.37mm)		 34th Driest
Driest since:
 1940
94th Wettest
Wettest since:
 2016
Ties: 1923, 2002
Mar 2020–Jan 2021
11-Month 		27.26"
(692.40mm)		 27.83"
(706.88mm)		 -0.57"
(-14.48mm)		 42nd Driest
Driest since:
 1957
86th Wettest
Wettest since:
 1974
Feb 2020–Jan 2021
12-Month 		29.71"
(754.63mm)		 29.96"
(760.98mm)		 -0.25"
(-6.35mm)		 48th Driest
Driest since:
 1931
80th Wettest
Wettest since:
 1974
Ties: 1970
Aug 2019–Jan 2021
18-Month 		45.40"
(1,153.16mm)		 44.14"
(1,121.16mm)		 1.26"
(32.00mm)		 83rd Driest
Driest since:
 1955
44th Wettest
Wettest since:
 2020
Feb 2019–Jan 2021
24-Month 		64.73"
(1,644.14mm)		 59.93"
(1,522.22mm)		 4.80"
(121.92mm)		 111th Driest
Driest since:
 1918
16th Wettest
Wettest since:
 2020
Feb 2018–Jan 2021
36-Month 		100.09"
(2,542.29mm)		 89.86"
(2,282.44mm)		 10.23"
(259.85mm)		 124th Driest
Driest since:
 1957
2nd Wettest
Wettest since:
 2020
Feb 2017–Jan 2021
48-Month 		131.01"
(3,327.65mm)		 119.76"
(3,041.90mm)		 11.25"
(285.75mm)		 121st Driest
Driest since:
 1957
4th Wettest
Wettest since:
 2020
Feb 2016–Jan 2021
60-Month 		163.63"
(4,156.20mm)		 149.63"
(3,800.60mm)		 14.00"
(355.60mm)		 120th Driest
Driest since:
 1957
4th Wettest
Wettest since:
 2020

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