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, December 2019

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
December 2019
1-Month 		2.57"
(65.28mm)		 2.35"
(59.69mm)		 0.22"
(5.59mm)		 78th Driest
Driest since:
 1930
51st Wettest
Wettest since:
 2015
Ties: 2006
Nov–Dec 2019
2-Month 		4.51"
(114.55mm)		 4.58"
(116.33mm)		 -0.07"
(-1.78mm)		 54th Driest
Driest since:
 1976
75th Wettest
Wettest since:
 2015
Ties: 2005
Oct–Dec 2019
3-Month 		7.70"
(195.58mm)		 6.74"
(171.20mm)		 0.96"
(24.38mm)		 99th Driest
Driest since:
 1917
30th Wettest
Wettest since:
 2015
Sep–Dec 2019
4-Month 		10.15"
(257.81mm)		 9.23"
(234.44mm)		 0.92"
(23.37mm)		 96th Driest
Driest since:
 1939
33rd Wettest
Wettest since:
 2018
Ties: 1942
Aug–Dec 2019
5-Month 		12.93"
(328.42mm)		 11.85"
(300.99mm)		 1.08"
(27.43mm)		 97th Driest
Driest since:
 1917
32nd Wettest
Wettest since:
 2018
Jul–Dec 2019
6-Month 		15.69"
(398.53mm)		 14.62"
(371.35mm)		 1.07"
(27.18mm)		 95th Driest
Driest since:
 1917
34th Wettest
Wettest since:
 2018
Ties: 1923
Jun–Dec 2019
7-Month 		19.06"
(484.12mm)		 17.55"
(445.77mm)		 1.51"
(38.35mm)		 104th Driest
Driest since:
 1917
25th Wettest
Wettest since:
 2018
May–Dec 2019
8-Month 		23.53"
(597.66mm)		 20.46"
(519.68mm)		 3.07"
(77.98mm)		 121st Driest
Driest since:
 1917
8th Wettest
Wettest since:
 2015
Apr–Dec 2019
9-Month 		26.74"
(679.20mm)		 22.98"
(583.69mm)		 3.76"
(95.51mm)		 122nd Driest
Driest since:
 1956
7th Wettest
Wettest since:
 2015
Mar–Dec 2019
10-Month 		28.98"
(736.09mm)		 25.49"
(647.45mm)		 3.49"
(88.64mm)		 121st Driest
Driest since:
 1956
8th Wettest
Wettest since:
 2015
Feb–Dec 2019
11-Month 		32.26"
(819.40mm)		 27.62"
(701.55mm)		 4.64"
(117.85mm)		 124th Driest
Driest since:
 1910
5th Wettest
Wettest since:
 2018
Jan–Dec 2019
12-Month 		34.82"
(884.43mm)		 29.94"
(760.48mm)		 4.88"
(123.95mm)		 127th Driest
Driest since:
 1910
2nd Wettest
Wettest since:
 1973
Jul 2018–Dec 2019
18-Month 		53.62"
(1,361.95mm)		 44.58"
(1,132.33mm)		 9.04"
(229.62mm)		 127th Driest
Driest since:
 1954
1st Wettest
Wettest to Date
 2019
Jan 2018–Dec 2019
24-Month 		69.47"
(1,764.54mm)		 59.90"
(1,521.46mm)		 9.57"
(243.08mm)		 127th Driest
Driest since:
 1931
1st Wettest
Wettest to Date
 2019
Jan 2017–Dec 2019
36-Month 		101.78"
(2,585.21mm)		 89.86"
(2,282.44mm)		 11.92"
(302.77mm)		 126th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2019
Jan 2016–Dec 2019
48-Month 		133.20"
(3,383.28mm)		 119.78"
(3,042.41mm)		 13.42"
(340.87mm)		 125th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2019
Jan 2015–Dec 2019
60-Month 		167.79"
(4,261.87mm)		 149.68"
(3,801.87mm)		 18.11"
(460.00mm)		 124th Driest
Driest since:
 1956
1st Wettest
Wettest to Date
 2019

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