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, April 1957

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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
April 1957
1-Month
3.65"
(92.71mm)
2.52"
(64.01mm)
1.13"
(28.70mm)
128th Driest
Driest since:
1987
1st Wettest
Wettest to Date
1957
Mar–Apr 1957
2-Month
6.16"
(156.46mm)
5.03"
(127.76mm)
1.13"
(28.70mm)
120th Driest
Driest since:
1910
9th Wettest
Wettest since:
1973
Feb–Apr 1957
3-Month
8.24"
(209.30mm)
7.16"
(181.86mm)
1.08"
(27.44mm)
111th Driest
Driest since:
1910
18th Wettest
Wettest since:
1983
Ties: 1961
Jan–Apr 1957
4-Month
10.37"
(263.40mm)
9.47"
(240.54mm)
0.90"
(22.86mm)
107th Driest
Driest since:
1910
22nd Wettest
Wettest since:
1998
Dec 1956–Apr 1957
5-Month
12.37"
(314.20mm)
11.82"
(300.23mm)
0.55"
(13.97mm)
88th Driest
Driest since:
1931
40th Wettest
Wettest since:
1983
Nov 1956–Apr 1957
6-Month
13.73"
(348.74mm)
14.05"
(356.87mm)
-0.32"
(-8.13mm)
58th Driest
Driest since:
1977
70th Wettest
Wettest since:
1983
Oct 1956–Apr 1957
7-Month
15.73"
(399.54mm)
16.22"
(411.99mm)
-0.49"
(-12.45mm)
51st Driest
Driest since:
1981
77th Wettest
Wettest since:
1983
Sep 1956–Apr 1957
8-Month
17.17"
(436.12mm)
18.71"
(475.23mm)
-1.54"
(-39.11mm)
25th Driest
Driest since:
1918
103rd Wettest
Wettest since:
2019
Aug 1956–Apr 1957
9-Month
19.38"
(492.25mm)
21.33"
(541.78mm)
-1.95"
(-49.53mm)
18th Driest
Driest since:
1918
110th Wettest
Wettest since:
2019
Jul 1956–Apr 1957
10-Month
22.16"
(562.86mm)
24.12"
(612.65mm)
-1.96"
(-49.79mm)
18th Driest
Driest since:
1931
110th Wettest
Wettest since:
2019
Jun 1956–Apr 1957
11-Month
24.37"
(619.00mm)
27.04"
(686.82mm)
-2.67"
(-67.82mm)
11th Driest
Driest since:
1931
117th Wettest
Wettest since:
2019
May 1956–Apr 1957
12-Month
26.97"
(685.04mm)
29.95"
(760.73mm)
-2.98"
(-75.69mm)
14th Driest
Driest since:
1918
114th Wettest
Wettest since:
2019
Nov 1955–Apr 1957
18-Month
39.91"
(1,013.71mm)
44.02"
(1,118.11mm)
-4.11"
(-104.40mm)
11th Driest
Driest since:
1931
116th Wettest
Wettest since:
2020
May 1955–Apr 1957
24-Month
55.11"
(1,399.79mm)
59.92"
(1,521.97mm)
-4.81"
(-122.18mm)
11th Driest
Driest since:
1955
116th Wettest
Wettest since:
2020
May 1954–Apr 1957
36-Month
81.05"
(2,058.67mm)
89.88"
(2,282.95mm)
-8.83"
(-224.28mm)
3rd Driest
Driest since:
1955
123rd Wettest
Wettest since:
2020
May 1953–Apr 1957
48-Month
107.68"
(2,735.07mm)
119.77"
(3,042.16mm)
-12.09"
(-307.09mm)
2nd Driest
Driest since:
1956
123rd Wettest
Wettest since:
2019
May 1952–Apr 1957
60-Month
134.52"
(3,416.81mm)
149.63"
(3,800.60mm)
-15.11"
(-383.79mm)
1st Driest
Driest since:
1957
123rd Wettest
Wettest since:
2020

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