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 1909

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
December 1909
1-Month		2.60"
(66.04mm)		2.35"
(59.69mm)		0.25"
(6.35mm)		82nd Driest
Driest since:
1930
47th Wettest
Wettest since:
2015
Ties: 1901
Nov–Dec 1909
2-Month		5.55"
(140.97mm)		4.58"
(116.33mm)		0.97"
(24.64mm)		113th Driest
Driest since:
1976
16th Wettest
Wettest since:
2015
Ties: 1951
Oct–Dec 1909
3-Month		7.09"
(180.09mm)		6.74"
(171.20mm)		0.35"
(8.89mm)		78th Driest
Driest since:
1917
51st Wettest
Wettest since:
2015
Ties: 2007
Sep–Dec 1909
4-Month		9.37"
(238.00mm)		9.23"
(234.44mm)		0.14"
(3.56mm)		65th Driest
Driest since:
1939
64th Wettest
Wettest since:
2018
Aug–Dec 1909
5-Month		11.78"
(299.21mm)		11.85"
(300.99mm)		-0.07"
(-1.78mm)		58th Driest
Driest since:
1917
71st Wettest
Wettest since:
2018
Jul–Dec 1909
6-Month		14.81"
(376.17mm)		14.62"
(371.35mm)		0.19"
(4.82mm)		63rd Driest
Driest since:
1917
66th Wettest
Wettest since:
2018
Ties: 1913
Jun–Dec 1909
7-Month		18.04"
(458.22mm)		17.55"
(445.77mm)		0.49"
(12.45mm)		72nd Driest
Driest since:
1917
57th Wettest
Wettest since:
2018
May–Dec 1909
8-Month		21.08"
(535.43mm)		20.46"
(519.68mm)		0.62"
(15.75mm)		77th Driest
Driest since:
1917
52nd Wettest
Wettest since:
2015
Apr–Dec 1909
9-Month		23.36"
(593.34mm)		22.98"
(583.69mm)		0.38"
(9.65mm)		67th Driest
Driest since:
1956
62nd Wettest
Wettest since:
2015
Mar–Dec 1909
10-Month		25.57"
(649.48mm)		25.49"
(647.45mm)		0.08"
(2.03mm)		61st Driest
Driest since:
1956
68th Wettest
Wettest since:
2015
Feb–Dec 1909
11-Month		28.45"
(722.63mm)		27.62"
(701.55mm)		0.83"
(21.08mm)		76th Driest
Driest since:
1910
53rd Wettest
Wettest since:
2018
Ties: 2011
Jan–Dec 1909
12-Month		31.19"
(792.23mm)		29.94"
(760.48mm)		1.25"
(31.75mm)		90th Driest
Driest since:
1910
39th Wettest
Wettest since:
1973
Jul 1908–Dec 1909
18-Month		44.34"
(1,126.24mm)		44.58"
(1,132.33mm)		-0.24"
(-6.09mm)		53rd Driest
Driest since:
1954
75th Wettest
Wettest since:
2019
Jan 1908–Dec 1909
24-Month		60.99"
(1,549.15mm)		59.90"
(1,521.46mm)		1.09"
(27.69mm)		78th Driest
Driest since:
1931
50th Wettest
Wettest since:
2019
Ties: 1949
Jan 1907–Dec 1909
36-Month		91.93"
(2,335.02mm)		89.86"
(2,282.44mm)		2.07"
(52.58mm)		86th Driest
Driest since:
1956
41st Wettest
Wettest since:
2019
Jan 1906–Dec 1909
48-Month		124.77"
(3,169.16mm)		119.78"
(3,042.41mm)		4.99"
(126.75mm)		100th Driest
Driest since:
1956
26th Wettest
Wettest since:
2019
Jan 1905–Dec 1909
60-Month		157.37"
(3,997.20mm)		149.68"
(3,801.87mm)		7.69"
(195.33mm)		106th Driest
Driest since:
1956
19th Wettest
Wettest to Date
2019

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