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, August 1920

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
August 1920
1-Month		3.40"
(86.36mm)		2.62"
(66.55mm)		0.78"
(19.81mm)		123rd Driest
Driest since:
1929
6th Wettest
Wettest since:
1977
Jul–Aug 1920
2-Month		6.10"
(154.94mm)		5.40"
(137.16mm)		0.70"
(17.78mm)		117th Driest
Driest since:
1930
12th Wettest
Wettest since:
1915
Jun–Aug 1920
3-Month		8.99"
(228.35mm)		8.32"
(211.33mm)		0.67"
(17.02mm)		106th Driest
Driest since:
1930
23rd Wettest
Wettest since:
1928
Ties: 1916, 2018
May–Aug 1920
4-Month		11.78"
(299.21mm)		11.23"
(285.24mm)		0.55"
(13.97mm)		85th Driest
Driest since:
1936
44th Wettest
Wettest since:
1915
Ties: 1946
Apr–Aug 1920
5-Month		15.08"
(383.03mm)		13.75"
(349.25mm)		1.33"
(33.78mm)		111th Driest
Driest since:
1934
18th Wettest
Wettest since:
2019
Mar–Aug 1920
6-Month		17.86"
(453.64mm)		16.26"
(413.00mm)		1.60"
(40.64mm)		111th Driest
Driest since:
1936
18th Wettest
Wettest since:
1905
Ties: 2016
Feb–Aug 1920
7-Month		19.47"
(494.54mm)		18.40"
(467.36mm)		1.07"
(27.18mm)		94th Driest
Driest since:
1934
35th Wettest
Wettest since:
2019
Jan–Aug 1920
8-Month		21.68"
(550.67mm)		20.71"
(526.03mm)		0.97"
(24.64mm)		93rd Driest
Driest since:
1934
36th Wettest
Wettest since:
2019
Dec 1919–Aug 1920
9-Month		23.49"
(596.65mm)		23.05"
(585.47mm)		0.44"
(11.18mm)		72nd Driest
Driest since:
1931
56th Wettest
Wettest since:
2019
Nov 1919–Aug 1920
10-Month		26.29"
(667.77mm)		25.28"
(642.11mm)		1.01"
(25.66mm)		84th Driest
Driest since:
1934
44th Wettest
Wettest since:
2019
Oct 1919–Aug 1920
11-Month		29.74"
(755.40mm)		27.45"
(697.23mm)		2.29"
(58.17mm)		106th Driest
Driest since:
1934
22nd Wettest
Wettest since:
2019
Sep 1919–Aug 1920
12-Month		32.08"
(814.83mm)		29.94"
(760.48mm)		2.14"
(54.35mm)		104th Driest
Driest since:
1934
24th Wettest
Wettest since:
2019
Mar 1919–Aug 1920
18-Month		48.89"
(1,241.81mm)		46.22"
(1,173.99mm)		2.67"
(67.82mm)		98th Driest
Driest since:
1931
30th Wettest
Wettest since:
2019
Sep 1918–Aug 1920
24-Month		63.78"
(1,620.01mm)		59.92"
(1,521.97mm)		3.86"
(98.04mm)		107th Driest
Driest since:
1918
20th Wettest
Wettest since:
2020
Sep 1917–Aug 1920
36-Month		88.38"
(2,244.85mm)		89.86"
(2,282.44mm)		-1.48"
(-37.59mm)		45th Driest
Driest since:
1956
81st Wettest
Wettest since:
2019
Sep 1916–Aug 1920
48-Month		115.34"
(2,929.64mm)		119.77"
(3,042.16mm)		-4.43"
(-112.52mm)		25th Driest
Driest since:
1956
100th Wettest
Wettest since:
2019
Sep 1915–Aug 1920
60-Month		146.34"
(3,717.04mm)		149.64"
(3,800.86mm)		-3.30"
(-83.82mm)		33rd Driest
Driest since:
1934
91st Wettest
Wettest since:
2019

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