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 1956

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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 1956
1-Month
2.07"
(52.58mm)
2.52"
(64.01mm)
-0.45"
(-11.43mm)
18th Driest
Driest since:
1987
111th Wettest
Wettest since:
1957
Ties: 1931
Mar–Apr 1956
2-Month
3.89"
(98.81mm)
5.03"
(127.76mm)
-1.14"
(-28.95mm)
5th Driest
Driest since:
1910
124th Wettest
Wettest since:
1973
Feb–Apr 1956
3-Month
6.51"
(165.35mm)
7.16"
(181.86mm)
-0.65"
(-16.51mm)
25th Driest
Driest since:
1910
104th Wettest
Wettest since:
1983
Jan–Apr 1956
4-Month
8.78"
(223.01mm)
9.48"
(240.79mm)
-0.70"
(-17.78mm)
34th Driest
Driest since:
1910
95th Wettest
Wettest since:
1998
Ties: 2007
Dec 1955–Apr 1956
5-Month
11.02"
(279.91mm)
11.82"
(300.23mm)
-0.80"
(-20.32mm)
31st Driest
Driest since:
1931
97th Wettest
Wettest since:
1983
Nov 1955–Apr 1956
6-Month
12.94"
(328.68mm)
14.05"
(356.87mm)
-1.11"
(-28.19mm)
26th Driest
Driest since:
1977
102nd Wettest
Wettest since:
1983
Ties: 1968
Oct 1955–Apr 1956
7-Month
14.98"
(380.49mm)
16.22"
(411.99mm)
-1.24"
(-31.50mm)
24th Driest
Driest since:
1981
104th Wettest
Wettest since:
1983
Sep 1955–Apr 1956
8-Month
17.09"
(434.09mm)
18.71"
(475.23mm)
-1.62"
(-41.14mm)
23rd Driest
Driest since:
1918
105th Wettest
Wettest since:
2019
Aug 1955–Apr 1956
9-Month
19.83"
(503.68mm)
21.33"
(541.78mm)
-1.50"
(-38.10mm)
28th Driest
Driest since:
1918
100th Wettest
Wettest since:
2019
Jul 1955–Apr 1956
10-Month
22.75"
(577.85mm)
24.12"
(612.65mm)
-1.37"
(-34.80mm)
32nd Driest
Driest since:
1931
96th Wettest
Wettest since:
2019
Jun 1955–Apr 1956
11-Month
25.22"
(640.59mm)
27.04"
(686.82mm)
-1.82"
(-46.23mm)
22nd Driest
Driest since:
1931
106th Wettest
Wettest since:
2019
May 1955–Apr 1956
12-Month
28.14"
(714.76mm)
29.95"
(760.73mm)
-1.81"
(-45.97mm)
24th Driest
Driest since:
1918
104th Wettest
Wettest since:
2019
Nov 1954–Apr 1956
18-Month
40.06"
(1,017.52mm)
44.02"
(1,118.11mm)
-3.96"
(-100.59mm)
14th Driest
Driest since:
1931
113th Wettest
Wettest since:
2020
May 1954–Apr 1956
24-Month
54.08"
(1,373.63mm)
59.92"
(1,521.97mm)
-5.84"
(-148.34mm)
7th Driest
Driest since:
1955
120th Wettest
Wettest since:
2020
May 1953–Apr 1956
36-Month
80.71"
(2,050.03mm)
89.88"
(2,282.95mm)
-9.17"
(-232.92mm)
2nd Driest
Driest since:
1955
124th Wettest
Wettest since:
2020
May 1952–Apr 1956
48-Month
107.55"
(2,731.77mm)
119.77"
(3,042.16mm)
-12.22"
(-310.39mm)
1st Driest
Driest since:
1956
124th Wettest
Wettest since:
2019
May 1951–Apr 1956
60-Month
139.01"
(3,530.85mm)
149.63"
(3,800.60mm)
-10.62"
(-269.75mm)
4th Driest
Driest since:
1957
120th Wettest
Wettest since:
2020

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