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 2015

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Wettest/Driest
Since		Record
January 2015
1-Month		1.83"
(46.48mm)		2.31"
(58.67mm)		-0.48"
(-12.19mm)		25th Driest
Driest since:
1981
105th Wettest
Wettest since:
1916
Dec 2014–Jan 2015
2-Month		4.41"
(112.01mm)		4.66"
(118.36mm)		-0.25"
(-6.35mm)		53rd Driest
Driest since:
1981
76th Wettest
Wettest since:
1932
Nov 2014–Jan 2015
3-Month		6.54"
(166.12mm)		6.89"
(175.01mm)		-0.35"
(-8.89mm)		45th Driest
Driest since:
1977
84th Wettest
Wettest since:
2016
Ties: 1945
Oct 2014–Jan 2015
4-Month		8.96"
(227.58mm)		9.06"
(230.12mm)		-0.10"
(-2.54mm)		54th Driest
Driest since:
1981
75th Wettest
Wettest since:
2016
Ties: 2012
Sep 2014–Jan 2015
5-Month		11.60"
(294.64mm)		11.55"
(293.37mm)		0.05"
(1.27mm)		65th Driest
Driest since:
1940
64th Wettest
Wettest since:
2019
Ties: 1941
Aug 2014–Jan 2015
6-Month		14.73"
(374.14mm)		14.17"
(359.92mm)		0.56"
(14.22mm)		81st Driest
Driest since:
1940
48th Wettest
Wettest since:
2019
Ties: 1949
Jul 2014–Jan 2015
7-Month		17.33"
(440.18mm)		16.96"
(430.78mm)		0.37"
(9.40mm)		75th Driest
Driest since:
1940
54th Wettest
Wettest since:
2019
Jun 2014–Jan 2015
8-Month		21.00"
(533.40mm)		19.88"
(504.95mm)		1.12"
(28.45mm)		96th Driest
Driest since:
1981
33rd Wettest
Wettest since:
2019
May 2014–Jan 2015
9-Month		23.81"
(604.77mm)		22.79"
(578.87mm)		1.02"
(25.90mm)		92nd Driest
Driest since:
1918
37th Wettest
Wettest since:
2016
Ties: 1927
Apr 2014–Jan 2015
10-Month		26.69"
(677.93mm)		25.32"
(643.13mm)		1.37"
(34.80mm)		97th Driest
Driest since:
1940
32nd Wettest
Wettest since:
2016
Ties: 1980
Mar 2014–Jan 2015
11-Month		29.06"
(738.12mm)		27.83"
(706.88mm)		1.23"
(31.24mm)		88th Driest
Driest since:
1957
41st Wettest
Wettest since:
1974
Feb 2014–Jan 2015
12-Month		31.31"
(795.27mm)		29.96"
(760.98mm)		1.35"
(34.29mm)		89th Driest
Driest since:
1931
40th Wettest
Wettest since:
1974
Aug 2013–Jan 2015
18-Month		44.70"
(1,135.38mm)		44.14"
(1,121.16mm)		0.56"
(14.22mm)		71st Driest
Driest since:
1955
57th Wettest
Wettest since:
2020
Ties: 2009
Feb 2013–Jan 2015
24-Month		61.37"
(1,558.80mm)		59.93"
(1,522.22mm)		1.44"
(36.58mm)		83rd Driest
Driest since:
1918
45th Wettest
Wettest since:
2020
Feb 2012–Jan 2015
36-Month		89.18"
(2,265.17mm)		89.86"
(2,282.44mm)		-0.68"
(-17.27mm)		57th Driest
Driest since:
1957
70th Wettest
Wettest since:
2020
Feb 2011–Jan 2015
48-Month		119.72"
(3,040.89mm)		119.76"
(3,041.90mm)		-0.04"
(-1.01mm)		58th Driest
Driest since:
1957
68th Wettest
Wettest since:
2020
Feb 2010–Jan 2015
60-Month		150.12"
(3,813.05mm)		149.63"
(3,800.60mm)		0.49"
(12.45mm)		62nd Driest
Driest since:
1957
63rd Wettest
Wettest since:
2020

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