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

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		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
85th 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
93rd 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
105th 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
99th 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
96th 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
99th 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
96th 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
98th 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
92nd 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
95th 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
87th 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
81st 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)		84th 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)		112th 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)		125th 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)		122nd 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)		121st Driest
Driest since:
1957
4th Wettest
Wettest since:
2020

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