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 1998

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
December 1998
1-Month 		2.08"
(52.83mm)		 2.35"
(59.69mm)		 -0.27"
(-6.86mm)		 39th Driest
Driest since:
 1930
90th Wettest
Wettest since:
 2015
Nov–Dec 1998
2-Month 		4.71"
(119.63mm)		 4.58"
(116.33mm)		 0.13"
(3.30mm)		 73rd Driest
Driest since:
 1976
56th Wettest
Wettest since:
 2015
Ties: 1923, 2009, 2014
Oct–Dec 1998
3-Month 		7.68"
(195.07mm)		 6.74"
(171.20mm)		 0.94"
(23.87mm)		 98th Driest
Driest since:
 1917
31st Wettest
Wettest since:
 2015
Sep–Dec 1998
4-Month 		10.19"
(258.83mm)		 9.23"
(234.44mm)		 0.96"
(24.39mm)		 97th Driest
Driest since:
 1939
32nd Wettest
Wettest since:
 2018
Aug–Dec 1998
5-Month 		12.61"
(320.29mm)		 11.85"
(300.99mm)		 0.76"
(19.30mm)		 85th Driest
Driest since:
 1917
44th Wettest
Wettest since:
 2018
Jul–Dec 1998
6-Month 		15.47"
(392.94mm)		 14.62"
(371.35mm)		 0.85"
(21.59mm)		 87th Driest
Driest since:
 1917
42nd Wettest
Wettest since:
 2018
Jun–Dec 1998
7-Month 		18.79"
(477.27mm)		 17.55"
(445.77mm)		 1.24"
(31.50mm)		 98th Driest
Driest since:
 1917
31st Wettest
Wettest since:
 2018
Ties: 1968
May–Dec 1998
8-Month 		21.41"
(543.81mm)		 20.46"
(519.68mm)		 0.95"
(24.13mm)		 80th Driest
Driest since:
 1917
49th Wettest
Wettest since:
 2015
Apr–Dec 1998
9-Month 		23.98"
(609.09mm)		 22.98"
(583.69mm)		 1.00"
(25.40mm)		 82nd Driest
Driest since:
 1956
47th Wettest
Wettest since:
 2015
Mar–Dec 1998
10-Month 		27.21"
(691.13mm)		 25.49"
(647.45mm)		 1.72"
(43.68mm)		 100th Driest
Driest since:
 1956
29th Wettest
Wettest since:
 2015
Ties: 1919
Feb–Dec 1998
11-Month 		30.53"
(775.46mm)		 27.62"
(701.55mm)		 2.91"
(73.91mm)		 116th Driest
Driest since:
 1910
13th Wettest
Wettest since:
 2018
Jan–Dec 1998
12-Month 		33.89"
(860.81mm)		 29.94"
(760.48mm)		 3.95"
(100.33mm)		 123rd Driest
Driest since:
 1910
6th Wettest
Wettest since:
 1973
Jul 1997–Dec 1998
18-Month 		48.94"
(1,243.08mm)		 44.58"
(1,132.33mm)		 4.36"
(110.75mm)		 117th Driest
Driest since:
 1954
11th Wettest
Wettest since:
 2019
Jan 1997–Dec 1998
24-Month 		65.75"
(1,670.05mm)		 59.90"
(1,521.46mm)		 5.85"
(148.59mm)		 120th Driest
Driest since:
 1931
8th Wettest
Wettest since:
 2019
Jan 1996–Dec 1998
36-Month 		99.45"
(2,526.03mm)		 89.86"
(2,282.44mm)		 9.59"
(243.59mm)		 123rd Driest
Driest since:
 1956
4th Wettest
Wettest since:
 2019
Jan 1995–Dec 1998
48-Month 		132.14"
(3,356.36mm)		 119.78"
(3,042.41mm)		 12.36"
(313.95mm)		 122nd Driest
Driest since:
 1956
4th Wettest
Wettest to Date
 2019
Jan 1994–Dec 1998
60-Month 		162.76"
(4,134.10mm)		 149.68"
(3,801.87mm)		 13.08"
(332.23mm)		 121st Driest
Driest since:
 1956
4th Wettest
Wettest to Date
 2019

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