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, October 1920

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
October 1920
1-Month
2.17"
(55.12mm)
2.16"
(54.86mm)
0.01"
(0.26mm)
59th Driest
Driest since:
1952
70th Wettest
Wettest since:
2009
Ties: 1905
Sep–Oct 1920
2-Month
4.61"
(117.09mm)
4.65"
(118.11mm)
-0.04"
(-1.02mm)
50th Driest
Driest since:
1952
79th Wettest
Wettest since:
2018
Ties: 1937, 1960
Aug–Oct 1920
3-Month
8.01"
(203.45mm)
7.27"
(184.66mm)
0.74"
(18.79mm)
100th Driest
Driest since:
1952
29th Wettest
Wettest since:
2018
Jul–Oct 1920
4-Month
10.71"
(272.03mm)
10.05"
(255.27mm)
0.66"
(16.76mm)
90th Driest
Driest since:
1952
39th Wettest
Wettest since:
1941
Ties: 2008
Jun–Oct 1920
5-Month
13.60"
(345.44mm)
12.97"
(329.44mm)
0.63"
(16.00mm)
80th Driest
Driest since:
1952
49th Wettest
Wettest since:
1941
May–Oct 1920
6-Month
16.39"
(416.31mm)
15.88"
(403.35mm)
0.51"
(12.96mm)
73rd Driest
Driest since:
1952
56th Wettest
Wettest since:
1941
Apr–Oct 1920
7-Month
19.69"
(500.13mm)
18.40"
(467.36mm)
1.29"
(32.77mm)
95th Driest
Driest since:
1952
34th Wettest
Wettest since:
1941
Mar–Oct 1920
8-Month
22.47"
(570.74mm)
20.91"
(531.11mm)
1.56"
(39.63mm)
99th Driest
Driest since:
1956
30th Wettest
Wettest since:
2019
Feb–Oct 1920
9-Month
24.08"
(611.63mm)
23.04"
(585.22mm)
1.04"
(26.41mm)
84th Driest
Driest since:
1934
45th Wettest
Wettest since:
2019
Ties: 2010
Jan–Oct 1920
10-Month
26.29"
(667.77mm)
25.36"
(644.14mm)
0.93"
(23.63mm)
87th Driest
Driest since:
1934
42nd Wettest
Wettest since:
2019
Dec 1919–Oct 1920
11-Month
28.10"
(713.74mm)
27.70"
(703.58mm)
0.40"
(10.16mm)
70th Driest
Driest since:
1931
58th Wettest
Wettest since:
2019
Nov 1919–Oct 1920
12-Month
30.90"
(784.86mm)
29.93"
(760.22mm)
0.97"
(24.64mm)
82nd Driest
Driest since:
1934
46th Wettest
Wettest since:
2019
Ties: 2020
May 1919–Oct 1920
18-Month
48.38"
(1,228.85mm)
45.83"
(1,164.08mm)
2.55"
(64.77mm)
96th Driest
Driest since:
1931
32nd Wettest
Wettest since:
2019
Ties: 1946
Nov 1918–Oct 1920
24-Month
63.03"
(1,600.96mm)
59.90"
(1,521.46mm)
3.13"
(79.50mm)
97th Driest
Driest since:
1931
30th Wettest
Wettest since:
2019
Nov 1917–Oct 1920
36-Month
89.44"
(2,271.78mm)
89.86"
(2,282.44mm)
-0.42"
(-10.66mm)
54th Driest
Driest since:
1956
72nd Wettest
Wettest since:
2019
Nov 1916–Oct 1920
48-Month
115.87"
(2,943.10mm)
119.78"
(3,042.41mm)
-3.91"
(-99.31mm)
27th Driest
Driest since:
1956
98th Wettest
Wettest since:
2019
Nov 1915–Oct 1920
60-Month
146.33"
(3,716.78mm)
149.66"
(3,801.36mm)
-3.33"
(-84.58mm)
30th Driest
Driest since:
1934
94th Wettest
Wettest since:
2019

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