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 1921

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
December 1921
1-Month
2.24"
(56.90mm)
2.35"
(59.69mm)
-0.11"
(-2.79mm)
52nd Driest
Driest since:
1930
77th Wettest
Wettest since:
2015
Ties: 1955
Nov–Dec 1921
2-Month
4.65"
(118.11mm)
4.58"
(116.33mm)
0.07"
(1.78mm)
67th Driest
Driest since:
1976
62nd Wettest
Wettest since:
2015
Oct–Dec 1921
3-Month
6.11"
(155.19mm)
6.74"
(171.20mm)
-0.63"
(-16.01mm)
33rd Driest
Driest since:
1917
96th Wettest
Wettest since:
2015
Sep–Dec 1921
4-Month
8.68"
(220.47mm)
9.23"
(234.44mm)
-0.55"
(-13.97mm)
39th Driest
Driest since:
1939
90th Wettest
Wettest since:
2018
Ties: 1978
Aug–Dec 1921
5-Month
11.28"
(286.51mm)
11.85"
(300.99mm)
-0.57"
(-14.48mm)
37th Driest
Driest since:
1917
92nd Wettest
Wettest since:
2018
Jul–Dec 1921
6-Month
14.14"
(359.16mm)
14.62"
(371.35mm)
-0.48"
(-12.19mm)
41st Driest
Driest since:
1917
88th Wettest
Wettest since:
2018
Ties: 1958
Jun–Dec 1921
7-Month
17.04"
(432.82mm)
17.55"
(445.77mm)
-0.51"
(-12.95mm)
44th Driest
Driest since:
1917
85th Wettest
Wettest since:
2018
May–Dec 1921
8-Month
19.59"
(497.59mm)
20.46"
(519.68mm)
-0.87"
(-22.09mm)
32nd Driest
Driest since:
1917
97th Wettest
Wettest since:
2015
Ties: 1962
Apr–Dec 1921
9-Month
22.38"
(568.45mm)
22.98"
(583.69mm)
-0.60"
(-15.24mm)
41st Driest
Driest since:
1956
88th Wettest
Wettest since:
2015
Ties: 1914
Mar–Dec 1921
10-Month
24.90"
(632.46mm)
25.49"
(647.45mm)
-0.59"
(-14.99mm)
39th Driest
Driest since:
1956
90th Wettest
Wettest since:
2015
Feb–Dec 1921
11-Month
26.67"
(677.42mm)
27.62"
(701.55mm)
-0.95"
(-24.13mm)
34th Driest
Driest since:
1910
95th Wettest
Wettest since:
2018
Jan–Dec 1921
12-Month
28.78"
(731.01mm)
29.94"
(760.48mm)
-1.16"
(-29.47mm)
32nd Driest
Driest since:
1910
97th Wettest
Wettest since:
1973
Ties: 1918
Jul 1920–Dec 1921
18-Month
44.50"
(1,130.30mm)
44.58"
(1,132.33mm)
-0.08"
(-2.03mm)
56th Driest
Driest since:
1954
72nd Wettest
Wettest since:
2019
Jan 1920–Dec 1921
24-Month
60.08"
(1,526.03mm)
59.90"
(1,521.46mm)
0.18"
(4.57mm)
64th Driest
Driest since:
1931
64th Wettest
Wettest since:
2019
Jan 1919–Dec 1921
36-Month
91.84"
(2,332.74mm)
89.86"
(2,282.44mm)
1.98"
(50.30mm)
84th Driest
Driest since:
1956
43rd Wettest
Wettest since:
2019
Ties: 1920
Jan 1918–Dec 1921
48-Month
120.62"
(3,063.75mm)
119.78"
(3,042.41mm)
0.84"
(21.34mm)
65th Driest
Driest since:
1956
61st Wettest
Wettest since:
2019
Jan 1917–Dec 1921
60-Month
145.97"
(3,707.64mm)
149.68"
(3,801.87mm)
-3.71"
(-94.23mm)
29th Driest
Driest since:
1956
96th Wettest
Wettest since:
2019

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