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, November 2020

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
November 2020
1-Month 		1.94"
(49.28mm)		 2.23"
(56.64mm)		 -0.29"
(-7.36mm)		 35th Driest
Driest since:
 1917
94th Wettest
Wettest since:
 1983
Ties: 2002, 2019
Oct–Nov 2020
2-Month 		4.12"
(104.65mm)		 4.40"
(111.76mm)		 -0.28"
(-7.11mm)		 42nd Driest
Driest since:
 1917
87th Wettest
Wettest since:
 1985
Ties: 1897, 2007, 2022
Sep–Nov 2020
3-Month 		6.56"
(166.62mm)		 6.88"
(174.75mm)		 -0.32"
(-8.13mm)		 46th Driest
Driest since:
 1939
83rd Wettest
Wettest since:
 1985
Ties: 1958
Aug–Nov 2020
4-Month 		8.98"
(228.09mm)		 9.50"
(241.30mm)		 -0.52"
(-13.21mm)		 36th Driest
Driest since:
 1952
93rd Wettest
Wettest since:
 2018
Ties: 1948
Jul–Nov 2020
5-Month 		11.92"
(302.77mm)		 12.28"
(311.91mm)		 -0.36"
(-9.14mm)		 47th Driest
Driest since:
 1952
82nd Wettest
Wettest since:
 2018
Jun–Nov 2020
6-Month 		14.65"
(372.11mm)		 15.20"
(386.08mm)		 -0.55"
(-13.97mm)		 40th Driest
Driest since:
 1952
89th Wettest
Wettest since:
 2004
May–Nov 2020
7-Month 		17.74"
(450.60mm)		 18.12"
(460.25mm)		 -0.38"
(-9.65mm)		 48th Driest
Driest since:
 1952
81st Wettest
Wettest since:
 2004
Apr–Nov 2020
8-Month 		20.26"
(514.60mm)		 20.63"
(524.00mm)		 -0.37"
(-9.40mm)		 49th Driest
Driest since:
 1952
80th Wettest
Wettest since:
 2015
Mar–Nov 2020
9-Month 		23.12"
(587.25mm)		 23.14"
(587.76mm)		 -0.02"
(-0.51mm)		 56th Driest
Driest since:
 1956
73rd Wettest
Wettest since:
 1973
Ties: 2006
Feb–Nov 2020
10-Month 		25.57"
(649.48mm)		 25.28"
(642.11mm)		 0.29"
(7.37mm)		 62nd Driest
Driest since:
 1910
67th Wettest
Wettest since:
 2019
Jan–Nov 2020
11-Month 		28.33"
(719.58mm)		 27.59"
(700.79mm)		 0.74"
(18.79mm)		 81st Driest
Driest since:
 1910
48th Wettest
Wettest since:
 2019
Ties: 1942
Dec 2019–Nov 2020
12-Month 		30.90"
(784.86mm)		 29.94"
(760.48mm)		 0.96"
(24.38mm)		 83rd Driest
Driest since:
 1931
45th Wettest
Wettest since:
 2019
Ties: 1932
Jun 2019–Nov 2020
18-Month 		47.39"
(1,203.71mm)		 45.16"
(1,147.06mm)		 2.23"
(56.65mm)		 95th Driest
Driest since:
 1931
33rd Wettest
Wettest since:
 2019
Dec 2018–Nov 2020
24-Month 		66.40"
(1,686.56mm)		 59.90"
(1,521.46mm)		 6.50"
(165.10mm)		 120th Driest
Driest since:
 1931
7th Wettest
Wettest since:
 2019
Dec 2017–Nov 2020
36-Month 		99.39"
(2,524.51mm)		 89.86"
(2,282.44mm)		 9.53"
(242.07mm)		 121st Driest
Driest since:
 1956
5th Wettest
Wettest since:
 2019
Dec 2016–Nov 2020
48-Month 		132.83"
(3,373.88mm)		 119.78"
(3,042.41mm)		 13.05"
(331.47mm)		 123rd Driest
Driest since:
 1956
2nd Wettest
Wettest since:
 2019
Dec 2015–Nov 2020
60-Month 		165.59"
(4,205.99mm)		 149.66"
(3,801.36mm)		 15.93"
(404.63mm)		 122nd Driest
Driest since:
 1956
2nd Wettest
Wettest since:
 2019

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